THE NEUROPSYCHIATRIC MANIFESTATION
OF LYME BORRELIOSIS
Brian A. Fallon, M.D. (1)
Jennifer A. Nields, M.D.
Joseph J. Burrascano, M.D.(2)
Kenneth Liegner, M.D. (3)
Donato DelBene, B.A. (1)
Michaell R. Liebowitz, M.D. (1)
PSYCHIATRIC QUARTERLY, Vol 63, No. 1 Spring 1992
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(1)Department of Psychiatry, College of Physicians and Surgeons of
Columbia University, and Division of Therapeutics, New York State
Psychiatric Institute, New York, N.Y.
(2)Southampton Hospital, Southampton, New York
(3)Northern Westchester Hospital Center, Mt. Kisco, New York
Address correspondence to Brian A. Fallon, M.D. New York Psychiatric
Institute, 722 West 168th Street, Box 13, New York, New York 10032
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Since the identification of the cause of syphilis in the early
1900s, psychiatrists have been aware that: (1) severe psychiatric
disorders may be caused by a central nervous system infection; and
(2) early antibiotic treatment may prevent permanent neurological
damage. Syphilis was known as the "great imitator" because its
multiple manifestations mimicked other known diseases. Today a new
epidemic has emerged that has multiple manifestations and has been
dubbed "the new great imitator" - Lyme borreliosis (Lyme
disease)(1). Because Lyme borreliosis, like syphilis, has
neuropsychiatric manifestations, psychiatrists are being asked to
see these patients-often before they are diagnosed. Incorrectly
labeling these patients as having a functional psychiatric disorder
may result in a delay in initiating antibiotic treatment. Such
delay can lead to severe disability and, possibly, irreversible
neurologic damage(2). Because of the epidemic of Lyme borreliosis
in areas of New York State and its rapid spread nationwide (3), it
behooves mental health professionals to be aware of its multiple
typical and atypical presentations.
Part 1 of this paper consists of a general overview of Lyme
disease and a review of its neuropsychiatric manifestations. Part 2
provides more detailed clinical descriptions of the neuropsychiatric
aspects of Lyme borreliosis and suggests ways in which psychiatrists
can be of help. The clinical vignettes will be based on data
collected from approximately 200 patients with sero-negative Lyme
disease.
PART 1.OVERVIEW (BRIAN A. FALLON)
Diagnosis
Lyme borreliosis, caused by the spirochette Borrelia burgdorferi,
is an infection commonly transmitted by the bite of an infected
arthropod - primarily ticks. A tick feeding may take up to 3 days
and disease transmission appears to take 12-24 hours. The clinical
spectrum of the disease includes dermatologic, neurologic,
opthalmologic, cardiac, rheumatologic, and psychiatriac
manifestations (4).
The criteria for diagnosising Lyme disease vary depending upon
the purpose. For surveillance studies (3), the diagnosis requires a
history of exposure in an endemic area and either : (1) a
physician-diagnose erythema chromicum migrans rash, or, (2) se
rologic evidence of exposure to Borrelia burgdorferi and one of the
following: (a) arthritic symptoms-recurrent brief attacks of joint
swelling or joint pain; (b) neurologic symptoms - such as
lymphocytic meningitis, cranial neuritis, radiculoneuropathy, and/or
encephalomyelitis; or (c) cardiac conduction defects-second or third
degree -----.
This definition, while for research purposes, is unduly
restrictive because about one-third of patients do not recall a rash
and because current serologic testing is generally considered
inadequate, producing false negatives and false positives (5).
Thus, the diagnosis of Lyme disease at this point remains clinical
not serologic.
Because Lyme borreliosis is multisystemic, the differential
diagnosis had to be broad, including viral infections, aseptic
meningitis, disseminated gonococcal infection, rheumatoid arthritis,
late stage syphilis, mutlipule sclerosis, Guillian-Barre, AIDS,
systemic lupus, subacute bacterial endocarditis, thyroiditis,
Reiter's syndrome, fibromyaligia, chronic fatigue symdrome, and
psychiatric disorders. If treated early, the disease may be limited
to an asymptomatic rash or only a few days to a week of flu-like
symptoms. In its later stages, patients may have multisystemic
disease, leading to an inability to work for months or years. The
simplest tasks may become insurmountable.
Distribution
Ticks infected with borrelia burgdorferi have been found across the
United States and around the world (6). The number of United States
cases has increased dramatically since record keeping started in
1980. Between 1985 and 1988, the number of states with reported
cases of Lyme borreliosis rose from 8 to 46 (3). Although
distributed nationwide, certain states carry the heaviest burden of
illness. In 1988, for example, New York State accounted for more
reports than any other state, contributing 56% of the national Lyme
case reports (3). Between 1986 and 1989, the annual incidence of
Lyme disease in NYS (based on reported cases which met the
surveillance definition) increased 7-fold. Many additional cases
were reported which did not meet the surveillance case definition.
These data indicate that Lyme disease is a steadily increasing
national public health problem.
History
Although many people believe that Lyme disease was discovered in
Lyme Connecticut in 1975, an illness very much like Lyme disease has
been recognized in Europe for over 100 years. In 1883, a German
physician described the rash common in the later forms of
Lyme disease-acrodermatitis atrophicans(7). In 1909 a Swedish
physician described the classic Lyme rash, known as erythema
chronicum migrans (ECM), and linked it to a tick-borne infection
(8). In 1922, Dr. Garin-Bujadoux described what is now recognized
as a disseminated form of Lyme disease. His patient developed ECM
after a tick bite, followed by radiculopathy, peripheral paralysis
of one arm, and meninigitis (9). In 1941, Dr. Bannwarth described a
similar neurologic syndrome and callled it "chronic lymphocytic
meningitis" (10). Principal signs were radicular pains, lymphocytic
meningitis without meningeal signs, and involvement of the
peripheral nervous system, particularly facial palsy. In Europe,
Lyme disease with neurological manifestations has been described
under many labels, including neuroborreliosis, the Garin-Bujadoux
syndrome, and Bannwarth's syndrome. Lab studies often demonstrate
an elevated ESR, an elevated spinal fluid IgM level, and pleocytosis
in the spinal fluid, often with lymphocytic predominance. As will
be discussed later, these abnormal lab findings are not always
present in the American form of neuroborreliosos.
Although the first report of a tick-induced ECM rash was from
Wisconsin in 1970 (11), Lyme disease first came to critical
attention in the United States in 1975 when Dr. Alan Steere
described what seemed to be a illness after investigating an
unusually high prevelance of presumed juvenile rheumatoid arthritis
in Old Lyme Connecticut. Naming this outbreak after the town in
which it occurred, he called this illness Lyme Arthritis (12). By
the late 1970's it was recognized tha the illness had systemic
manifestations including neurologic, rheumatologic, dermatologic,
cardiac components and so the name of the illness was changed from
Lyme arthritis to Lyme disease. In 1982, the infectious agent
Borrelia burgdorferi was identified (4). Soon thereafter, reports
indicated that the European neuroborreliosis was caused by a similar
if not identical organism (13). In acknowledgement of this
infectious agent, Lyme diseas is now referred to as Lyme
borreliosis.
Clinical Profile
There are a wide variety of symptoms associated with Lyme
borreliosis. Symptoms vary greatly, one or more systems may be
involved, and new manifestations continue to be described. The
progression of illness has generally been separated into early and
late borreliosis.
The most identifiable early symptom of Lyme disease is the rash,
erthema chronicum migrans, which may appear days to weeks after the
bite. The rash typically is a bull's eye rash that may enlarge from
its site of origin to 10cm or greater. Commonly the patient may
experience flu like symptoms-fatigue and malaise, arthralgias,
myalgias (backaches, stiff neck), fever, headaches. These symptoms
however may be mild and therefore unremarkable.
The patient may not notice any symptoms until weeks or months
after the original tick bite when late stage infection has already
set in. Such late stage symptoms include neurologic, arthritic,
opthalmologic, psychiatric, dermatologic and/or cardiac symptoms.
If untreated, the symptoms may last for months and years, sometimes
punctuated by spontaneous remissions and recurrences. About 15
percent of infected patients develop objective neurologic
abnormalities, most commonly displaying part of the triad of
aseptic meningitis, cranial neuritis, and motoror sensory
radiculitis. ASEPTIC MENINGITIS may begin with recurrent attacks of
headaches, stiff neck, photophobia, nausea, and vomiting. The
headaches may fluctuate from mild to severe. Spinal fluid abnorma
lities may include a pleocytosis or lymphocytosis, and increase in
the IgG synthesis rate, an elevated CSF protein, and oligoclonal
immuoglobulins. The opening pressure may not be elevated (15).
CRANIAL NEURITIS, such as Bell's palsy, may be unilateral or
bilateral and may be seen in 5-10% of patients with neuroborreliosis
(16). Other cranial nerves may be involved as well, especially the
3rd, 4th, and 6th. The RADICULOPATHIC SYNDROMES may also be
unilateral or bilateral, with a predominance of motor over sensory
symptoms. The most common dermatomes involved are the fifth
cervical dermatome and T8 through T12 (14). Formal pain testing may
show diminished or absent pain sensation in affected dermatome. In
Europe, the syndrome of meningitis and radiculitis was known as
Bannwarth's syndrome.
The most common CARDIAC PROBLEM is an atrioventricular block
(second or third degree) (17). Other cardiac problems may include
acute myopericarditis, left ventricular dysfunction, and
cardiomegaly. Although most cardiac symptoms tend to be brief,
lasting from 3 days to 6 weeks, and rarely lead to residual
dysfunction, increasing evidence suggests that Lyme disease carditis
may be of long duration and lead to permanent heart damage(18).
Later into the disseminated phase of the illness, patients may
develop arthritic, other neurologic, opthalmolgic, and other
dermatologic symptoms. The timing may be variable, occurring within
weeks of the early symptoms or after a gap of several years. The
ARTHRITIC SYMPTOMS may begin as a migratory musculoskeletal
discomfort (similar to fibromyalgia). In 60% of untreated patients,
an inflammatory arthritis develops, typically affecting large
joints, such as the knee. Subsequently a small portion of patients
with arthritis develop chronic synovitis. Arthritis attacks,
lasting days to weeks, amy recur for several years. OPTHALMOLOGIC
manifestations in the early stage may include conjunctivitis,
iritis, and uveitis while in late stage illness optic neuritis and
optic atrophy may occur (4). The late DERMATOLOGIC entity, known as
acrodermatitis chronica atrophicans, is more common in Europe than
in the United States (13).
The LATE NEUROLOGIC SYMPTOMS consist primarily of mild to severe
ENCEPHALOPATHY, A POLYNEUROPATHY, AND PROFOUND FATIGUE. This
encephalopathy which is thought to occur in 9 of 10 patients with
chronic neuroborreliosis is often characterized by subtle
disturbances in mood, memory and sleep (2). It is in ruling out
subacute encephalopathy that psychiatrists will have their greatest
diagnostic challenge, for these patients may be irritable, tearful,
depressed, and have poor concentration and sleep. A diagnostic tip
in favor of Lyme disease as the cause of the depression and
irritability might be concomitant memory loss, word finding
problems, or a concomitant polyneuropathy. The POLYNEUROPATHIES,
often demonstrable on electrophysiologic testing, include spinal or
radicular pain, paresthesias, sensory loss, and/or lower motor
neuron weakness.
A recent study (2) indicated that chronic neurologic
abnormalities may emerge anywhere from 1 month to 14 years after
infection. Like syphilis, therefore, Lyme borreliosis may remain
latent and asymptomatic for a long period of time. Patients may
have chronic neurologic symptoms for more than one year, with some
patients suffering for 10 years or more despite having received
antibiotic therapy.
Cognitive impairmants among patients with late Lyme disease may
be subtle. Some patients may demonstrate initial abnormalities on
neuropsychological testing, while others may not (2,19). Serial
neuropsychological testing before and after antibiotic treatment may
reveal significant improvement after treatment. In on study (19),
improvement was noted on tests of memory (California Verbal Learning
Test, Wechsler Memory Scale), attention and concentration (Symbol
Digit Modalities), conceptual ability (Booklet Categories Test), and
psychomotor and perceptual motor function (Block Design Subtest of
the WAIS and Purdue Pegboard). Initial scores fell within normal
range on some of these tests (eg. Wechsler Memory Scale) but
nevertheless improved after treatment; this demonstrated that some
patients with subjective memory loss that is not apparent on initial
neuropsychological testing may nevertheless benefit from antibiotic
treatment. Noteworthy is that many patients with cognitive deficits
did not have clinical evidence of focal CNS disease. EEG's CSF
studies, and most other laboratory investigations were often normal.
MRI scans were abnormal in many of the patients with moderate to
severe memory impairment. The MRI abnormalities, which may be
indistinguishable from those seen among patients with multiple
sclerosis, indicated edema or inflammation suggesting the the Lyme
disease patients may be suffering from a mild inflammatory
encephalomyelitis. Finally, it should be noted that some patients
even after a course of intravenous antibiotic treatment continue to
have memory impairments demonstrable on neuropsychological testing
(Selective Reminding Test) (20).
The course and severity of illness can vary. In most cases,
Lyme disease if treated early is a transient illness with mild
symptoms and no long term sequelae. In a smaller portion of
patients, the course may be chronic and severe. Case reports have
linked a variety of neurologic syndromes to late Lyme disease,
including blindness (21), progressive demyelinating-like syndromes
(mimicking Multiple sclerosis) (2) or Amyotrophic lateral sclerosis
(22), Guillain-barre (23), progressive dementias (24), seizure
disorders (25), strokes (26), and extrapyramidal disorders (27).
Encephalomyelitis can be caused by borrelia burgdorferi and is
characterized by spastic paraparesis, ataxia, cognitive impairment,
bladder dysfunction, and cranial neuropathy (28). Finally, although
transplacental transmission of borrelia burgdorferi does occur and
only rarely leads to fetal injury, neonatal death has been linked
with Lyme borreliosis based on culture positive frontal cortex
specimens (29).
Laboratory Tests
Because borrelia burgdorferi is difficult to culture, physicians are
using indirect methods to detect the spirochetes. Antibody tests,
such as indirect immunofluorescence and the enzyme-linked
immunosorbent assay (ELISA), were initally thought to be dependable
lab tests for the diagnosis of Lyme borreliosis. Now it is
recognized that these tests give both false negative and false
positive results (5). In addition, results from different
laboratories on the same specimen may be highly variable, with one
indicating no reactivity and another reporting significant antibody
titers. Seronegative Lyme borreliosis, once a source of
controversy, is now recognized as a diagnostic problem (30).
Patients may have no detectable antibodies to Borreia burgdorferi in
either their serum or their CSF, but still have clinical disease. A
recent report described 6 patients who were seronegative and
CSF-antibody negative who were subsequently shown to have evidence
of the spirochetes in the CSF based on a positive polymerase chain
reaction assay (31).
The Western blot is often used to confirm positive results from
an ELISA or IFA, although it too may be falsely negative or falsely
positive. When meningopolyneuritis or encephalomyelitis is
suspected, intrathecal antibody determinations should be attempted.
The spinal fluid may reveal a mononuclear pleocytosis and/or an
elevated CSF IgG or IgM for borrelia burgdorferi. CT and MRI
findings may occur in the encephalitis cases, as well as EEG slowing
and epileptic discharges. However, as previously noted, serologic
and other objective abnormalities are not always found. Silver
staining has been used for detecting spirochetes in tissues, but the
yield is low. The polymerase chain reaction (31), which amplifies a
target DNA sequence specific for Lyme disease, has promise as a
sensitive and potentially specific means for identifying Borrelia
burgdorferi. This test's commercial usefulness, given marked
difficulties in avoiding contamination which cause false positives,
remains to be determined.
Treatment
Lyme disease is treatable with antibiotics, however treatment may be
less effective in the late stage of illness (32). Oral antibiotics,
such as amoxacillin and doxycline, are considered effective for the
early stage of the illness. When the central nervous system is
involved, intravenous antibiotic treatment with third generation
cephalosporins, such as ceftriaxone sodium and cefotaxime, is
indicated for at least 10 days to 3 weeks. Recent reports now
suggest that longer courses of treatment may be needed, as well as
repeated courses if symptoms recur (2,33,42). Early during the
antibiotic tratment patients may experience a sudden worsening of
symptoms. This Jarisch-Herxheimer-like reaction is thought to be an
inflammatory response to spirochetal lysis (33).
Patients given antibiotics early in illness tend not to have
major late complications, although an unknown percentage of patients
treated early still develop late complications. It is now thought
that relapse is due to continued presence of spirochetes (2,42).
Although most patients do improve with treatment, a subgroup of
patients with late Lyme disease may not improve after a course of
intravenous antibiotics (2).
Psychiatric Manifestations
A review of the world literature on the psychiatric manifestations
of Lyme borreliosis suggests that psychiatric problems may be a
prominent feature of Lyme borreliosis. The literature consists
largely of case reports and small series and thus must be regarded
as suggestive rather that definitive.
In 1930 a patient was described who three months after an ECM
rash developed an encephalitis with psychotic symptoms and marked
CSF abnormalities (34). More recently, a patient with Lyme
borreliosis was described whose clinical picture was indistingui
shable from an endogenous schizophrenia (35). The
patient's paranoia and hallucianations remitted after one week of
antibiotic treatment with ceftriazone, but aftrwards the patient
showed a mild organic brain syndrome.
In Europe, two recent review articles have stated that
psychiatric symptoms can be a prominent feature of Lyme borreliosis,
including agitated depression and psychosis (36,37). Kohler
described a staging of psychiatric symptoms which parallel the
neurologic ones. In stage I, fibromyalgia, painful muscular
fasciculations, and mild depression may dominate the clinical
picture. In stage II, a lymphocytic meningopolyneuritis may occur
along with an organic psychiatric disorder, such as organic
affective syndrome or an organic personality syndrome. In stage
III, chromic encephalitides and myelitides may be accompanied by
severe psychiatric syndromes, such as organic psychoses, dementia,
and anorexia nervosa. This staging was based on clinical
observation not systematic studies.
In the United States, Pachner (38) presented two patients whose
symptoms were largely psychiatic. A 12 year old boy with confirmed
Lyme arthritis treated with oral antibiotics subsequently became
depressed an anorectic. After being admitted to a psychiatric
hospital with the diagnosis of anorexia nervosa, he was noted to
have positive serologic tests for Borrelia burgdorferi. Treatment
with a 14 day course if intravenous antibiotics led to a resolution
of his depression and anorexia; this improvement was sustained on 3
year follow-up. A 21 year old man seropositive for Borrelia
burgdorferi developed progressive confusion, agitation,
disorientation, inapproppriate laughter, and violent outbursts; a
temporal lobe biopsy revealed spirochetes. Treatment with IV
penicillin resulted in a return to normality within 3 months.
In one U.S. study of 27 patients with late neuroborreliosis, 33%
were depressed based on their scores on the Minnesota Multiphasic
Personality Inventory (2). 89% of these 27 patients also had
evidence of mild encephalopathy, characterized by memory loss (81%),
excessive daytime sleepiness (30%), extreme irritability (26%), and
word finding difficulties (19%). Controlled studies indicate
significantly more depression among patients with late Lyme
borreliosis than among normal controls (20) and other chronically
ill patients (39).
Confounding accurate diagnosis is the fact that many of the
prominent symptoms of Lyme disease share features with depressive
illness, including irritability, fatigue, emotional lability, poor
concentration, memory problems, and impaired sleep (2). Ruling out
Lyme disease as a cause of these depressive symptoms can be
difficult because currently available serological tests are
inadequate, a third of all patients do not recall a rash or tick
bite, and a long quiescent period may precede the late symptoms.
Even when the diagnosis of Lyme disease is clear, optimal treatment
of these depressive symptoms is uncertain because in many patients
the symptoms persist even after the standard 3 week course of
antibiotics. While some doctors feel that depressive syptoms in the
context of Lyme disease are evidence of continued disseminated
infection, others believe that these represent a secondary emotional
response to having a serious illness. Appropriate treatment if the
former is true would consist of further antibiotics, which if the
latter is true psychotherapy and/or anti depressant therapy would be
the treatment of choice. Delayed additional antibiotic treatment
due to an incorrect assessment of the disease process may enable an
acute illness to develop into a chronic one (2).
In conclusion, further systematic study is clearly needed to
better understand the prevalence and pathophysiology of psychiatric
problems among patients with Lyme borreliosis and to identify
optimal treatment. A critical review of the literature indicates
that disturbances of mood, memory, and sleep are prominent features
of this illness. Whether borrelia burgdorferi also causes psychotic
disorders and eating disorders remains an open question.
Neurosyphilis, also caused by a spirochete, is known to be
associated with memory problems, depression, mania, psychosis, and
personality changes, such as irritability, emotional lability, and
apathy (40). Given the remarkable similarities between syphilis and
Lyme borreliosis, it is possible that the full range of psychiatric
symptoms seen in neurosyphilis may also soon be recogmized as
features of Lyme borreliosis.
THE NEUROPSYCHIATRIC MANIFESTATIONS
OF LYME BORRELIOSIS
Brian A. Fallon, M.D. (1)
Jennifer A. Nields, M.D.
Joseph J. Burrascano, M.D.(2)
Kenneth Liegner, M.D. (3)
Donato DelBene, B.A. (1)
Michaell R. Liebowitz, M.D. (1)
PSYCHIATRIC QUARTERLY, Vol 63, No. 1 Spring 1992
PART II. THE CLINICAL EXPERIENCE OF LYME
DISEASE: PATIENTS' PERSPECTIVES AND THE
PSYCHIATRIST'S ROLE (JENNIFER A. NIELDS)
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The purpose of this section is to better acquaint the clinician with
some of the typical, often bizarre, neuropsychiatric symptoms seen
in late-stage Lyme disease as well as with some of the psychological
stresses that specific aspects of this illness and its treatment
place on patients and their families. Psychiatrists should be alert
to these clinical aspects of the disease in order not to miss the
diagnosis of Lyme disease in patients who present with primarily
psychiatric complaints and in order to render more effective care to
patients with known disease. Accordingly, this section is
descriptive; it is based on clinical interviews with adult and
pediatric patients and their families as well as written
descriptions from among 200 seropositive patients who responded to a
questionnaire regarding neuropsychiatric symptoms. Symptom
frequencies drawn from an initial sample of 85 seropositive patients
with clinical symptoms of late stage Lyme disease will be presented.
A full description of this questionnaire and detailed results will
be published elsewhere. The frequencies should not be considered
representative Lyme disease patients in general but rather of a
subgroup with severe, longstanding and/or chronic disease.
PHENOMENOLOGY
Among the respondents to the questionnaire, some described syndromes
indistinguishable from major depression, generalized anxiety diorder
or panic attacks. Patients also described a variety of other
neuropsychiatric symptoms, and the most prevalent and distinctive
among such symptoms will be detailed here. (The arthritic,
dermatologic, and cardiac symptoms will not be discussed.) Not all
of the neuropsychiatric symptoms that follow are specific to Lyme
borreliosis nor is the list comprehensive, but taken together they
provide a clincial pattern typical of the cases in our study.
FATIGUE AND MEMORY LOSS
Some of the most commonly reported symptoms in our sample were
fatigue (94%) and memory problems (83%). Sometimes the fatigue is
relatively mild, allowing the patient to continue working, perhaps
in a diminished capacity. Sometimes, however, the symptoms may be
quite severe, such that the patient may be bedridden due to
intractable fatigue. Memory problems, too, can be mild or quite
severe. One woman in our sample who had been a telephone
switchboard operator for 20 years reported suddenly being unable to
remember how to transfer calls. In this woman's case, the memory
problems resolved completely following antibiotic treatment.
The differential diagnosis between fatigue and memory problems
due to active Borrelial infection versus as part of another
disorder, such as fuctional depression or chronic fatigue syndrome,
is an important one. Patients with active borrelial infection who
have prominent fatigue and memory problems may respond well to
antibiotic treatment whereas for patients with a non-Lyme related
syndrome such treatment would be of no benefit. A history of tick
exposure, positive serologies, erthema migrans, and other associated
neurologic or arthritic symptoms may alert the clinician to the
diagnosis of Lyme disease. If Lyme disease has been diagnosed and
the patient has persistent symptoms despite having receivec a prior
"adequate" course of antibiotics, some clinicians will recommend no
further antibiotic treatment (based on the post infectious
autoimmune hypothesis) while others may recommend continued
treatment until all symptoms remit (based on the persistent
sequestered infection hypothesis). Treatment responses may be
difficult to gauge both because fluctuations in symptomatology occur
even in untreated Lyme disease, and because the clinical response to
effective antibiotic treatment may be delayed in some cases.
PHOTOPHOBIA
As in various other infections and or CNS disturbances (e.g.
menigitis, migraine, psittacosis, typhus, Rocky Mountain Spotted
Fever), photophobia may be a prominent feature. In our sample, 70%
of respondents reported photophobia. The severity of this symptom
can be quite striking, and there may be variants, including
idiosyncratic reponses to particular kinds of light. Patients may
need to wear sunglasses or glacier glasses, even indoors, even at
night. Several patients reported feeling "faint" or "dizzy" in
particular when exposed to fluorescent lights, making it difficult
to go to supermarkets or other public places. Of note: such a
patient might be referred to a psychiatrist because of what seemed
like agoraphobia. Some patients have developed panic-attacks that
seemed to be triggered by sound or light stimulation-especially
bright lights that flicker, such as fluorescent lights - and which
resolved following atnibiotic treatment. Others have developed
nausea in response, again, to lights that flicker:fluorescent
lights, TV or computer screens, strobe lights during EEG testing or
headlights of cars moving in the opposite line of traffic. The
hypersensitivity to light can be incapacitating or merely
uncomfortable. It may preclude driving at night or going outdoors
during the day or it may make what are normally routine or even
pleasurable activities seem noxious.
SOUND SENSITIVITY
A more distinctive, somewhat less common but often very intense
symptom, reported in 48% of our sample , is hypersensitivity to
and/or idiosyncratic responses to sound stimulation. One boy
developed sound sensitivity so severe that ordinary conversation was
deafening to him; he wore head phones and put pillows over his head
to block out the sound. To one woman even the sound of another
person's breathing seemed unbearably loud. In her case, the sound
sensitivity also included vertigo, nausea and nystagmus in response
to sounds. Any sudden sound, like the phone ringing, and certain
household sounds, like the running of tap water, could cause her to
fall or retch. This peculiar short-circuiting of the inner ear's
auditory and vestibular functions is known as the Tullio phenomenon.
This phenomenon has been deemed pathognomonic for syphilis (43) but,
as it appears, can occur in Lyme disease as well(41), and thus
provides one more example of the "new great imitator," Lyme disease,
imitating the old "great imiatator," syphilis(1).
SENSORY HYPERACUSIS
As previously reported in illnesses caused by other species of
borrelia (44), hypersensitivity can occur in other sensory
modalities as well: touch, taste and smell. Abnormalities of taste
and smell occured in 30% and 25% of our sample, respectively. Foods
may taste abnormally sour or bitter; smells may seem overly intense
and noxious. Alterations in the perception or processing of other
kinds of sensory stimulation occur also. One patient, before she
realized she was ill with Lyme disease, noticed one day that her car
was vibrating with unusual violence. She took the car emergently in
to a mechanic, thinking that the shock absorbers were shot or the
ball bearings loose and that it would be dangerous to continue to
drive the car in that condition. As it turned out, there was
nothing wrong with the car. The problem was in the patient who had
suddenly and unwittingly developed a heightened sensitivity to
vibrations. She subsequently became alert to this heightened
vibration sense in other contexts as well. When the diagnosis of
Lyme disease was finally made, this symptom, along withother, more
common symptoms of Lyme disease, resolved with antibiotic treatment.
EXTREME IRRITABILITY AND/OR EMOTIONAL LABILITY
Many patients reported mood and behavioral changes during the course
of their illness. In our sample, 84% of patients reported increased
irritability and/or emotional lability in association with symptoms
suggestive of meningeal irritation: neck stiffness and headache.
The mood and behavior changes are often so severe and pervasive as
to constitute a personality change. Sudden, intense irritability is
most often triggered by sensory stimulation in patients who are
acutely sensitive to sound, touch or light but may also occur
unprovoked and seemingly inexplicably. One man, acutely senstive to
sound, was so intensely bothered by the noise his three year old son
was making that he picked him up and shook him in a sudden and
unprecedented fit of violence. His wife was shocked and alarmed by
this behavior, as was the patient himself. A woman, typically
reserved and eager to please, became
uncontrollably irritable one day at work and found herself yelling
at her boss in a most uncharacteristic fashion. Others have found
themselves bursting into tears, sometimes several times a day, on
what seems like very little provocation.
WORD REVERSALS WHEN SPEAKING AND/OR LETTER REVERSALS WHEN WRITING
These odd, idiosyncratic but quite common symptoms were reported in
69% of our sample. Patients with no prior history of dyslexia have
found themselves writing letters backwards, reversing numbers or
routinely reversing the first and second letters of a word. One
patient recalls also switching her shoes: putting the left shoe on
the right foot and the right shoe on the left foot before she
realized her mistake. This patient also experienced what might be
understood as reversals in temporal sequencing: for instance, saying
the work "tomorrow" when she meant "yesterday" and vice versa.
SPATIAL DISORIENTATION
Reported in 57% of our sample. A not uncommon scenario is of a
patient who, recalling no rash or flu-like symptoms, had experienced
some aches and pains and/or memory problems but had not paid much
attention to these symptoms until he found himself, on two
consecutives days, lost in his own neighborhood, on his way home
from work. Such a scenario suggests a disorder of topographic
orientation and geographic memory such as may be seen among patients
with parietal lobe dysfunction (45). Patients have reported other
behaviors as well which seem to relate to disturbances of the
body-environmental schemata. A young woman described repeatedly
bumping into things on the left side of her body, dropping things
from her left hand despite having no weakness in that hand and
occasionally placing objects, such as a milk carton, several inches
short of a table edge with the result that they would fall to the
floor. These difficulties remitted completely following adequate
antibiotic treatment.
FLUCTUATIONS IN SYMPTOMS
This can be one of the most frustrating and perplexing aspects of
the illness. A patient with late-stage Lyme disease might feel
totally drained one day, the next day be able to function almost
normally and and day after experience such mental confusion as to be
unable to focua on even the simplest of tasks. Sometimes the
fluctuations may be brought on by exertion or stress or exposure to
sensory stimuli or by the initation of antibiotic treatment, but
sometimes no explanation can be found. The fluctuations make it
impossible for patients to make plans, and may make it seem to
friends, teachers, family members or even the patients themselves as
if the symptoms were somehow under voluntary control or as if they
were hysterical in origin. Of course psychological factors, too,
can influence symptomatology, but fluctuations are typical
regardless of mental state.
Such vicissitudes raise a particular problem in children who may
experience fluctuating cognitive impairments: short-term memory
problems, word finding difficulties, dyslexia, problems with
calculations or inability to concentrate. School systems are by and
large unaware of the cognitive aspects of late-stage Lyme
disease and, in particular, of the ways in which cognitive
impairments may fluctuate from day to day in a given child.
Teachers may assume the child is just moody or uncooperative.
Family dynamics, too, may be complicated by confused expectations of
the sick member, and resentments may build when a person's
functional status, mood and ability to participate in family life
seem inexplicably erratic. Patients and family members alike find
it difficult to have their hopes raised repeatedly by a transient
clinical improvement, only to be slapped down again by a
recrudescence of debilitating symptoms. Even with treatment,
recovery from late-stage Lyme disease is most often a lengthy
process involving significant fluctuations in symptoms even in the
context of overall improvement.
WORSENING OF SYMPTOMS DURING ANTIBIOTIC TREATMENT
Nearly half of the patients in our sample reported a transient
worsening of neuropsychiatric symptoms during the first few days of
antibiotic treatment. The worsening of syymptoms during initiation
of antibiotic treatment is thought to be a variant of Herxheimer
reaction as seen in the treatment of syphilis (33). In Lyme
disease, however, this Herxheimer-like reaction can be quite
prolonged - lasting a few days or longer - and can be frightening to
patients who are expecting a resolution, not worsening, of their
symptoms. The reaction can sometimes be difficult to distinguish
from an allergic reaction to the medicine, a distinction with
obvious and crucial treatment implications.
This Herxheimer-like reaction may be experienced as a worsening
of psychiatric symptoms:some patients in our sample experienced
panic attacks for the first and only time when starting on
antibiotics. Others have reported an intensification of depressive
symptoms, suicidality or anxiety. Many reported an increased
startle response and photophobia during the first few days of
antibiotic treatment.
UNCERTAINTY AS TO DIAGNOSIS AND TREATMENT
A great deal is unknown about Lyme disease at this point in time,
and experts disagree regarding its diagnosis and management. Some
patients remain seronegative, for a variety of reasons (some known,
some unknown) (30) and therefore remain undiagnosed and untreated
for long periods of time. The medical literature now documents that
some patients, even following what has been presumed to adequate
treatmen, go on to develop late-stage symptoms, sometimes months or
years later (2). Even now, some doctors think that so-called
seronegative Lyme disease is fairly common and others that it is
virtually nonexistent. Some doctors believe that prolonged
antibiotic treatment may be necessary in late Lyme disease (33,46),
and others, emphasizing the less specific symptoms of late Lyme
disease (similar to fibromyalgia or chromic fatigue syndrom),
consider such treatment in many cases to be excessive and
unreasonable (47). Patients may be told that Lyme disease is easily
curable with antibiotics and that further concern about it is a
matter "Lyme anxiety"(48); from other sources, they may learn that
Lyme infection in some cases may lead to a chronic, severly
debilitating, perhaps irreversible disease (2).
Such manifold uncertainties as to diagnosis, treatment and
prognosis at this state in the history of Lyme disease put the
patient in a difficult position. The patient may get conflicting
advice from reputable sources and not know what to do. He may be
told that his symptoms are not related to Lyme disease. He may be
told there is no medical cause for his complaints and be referred to
a psychiatris. And, especially since Lyme disease may in fact
involve the brain and manifest as depression or confusion or
irritability, it may be hard not only for the clinician, but also
for the patient himself to recognize the effects of the disease as
against his emotional reactions to it. Some patients, who have
subsequently been effectively treated, have said that, prior to
being diagnosed, they had feared they were just going crazy.
HOW CAN THE PSYCHIATRIST BE OF HELP?
It is important to make a clear diagnostic assessment of the range
of problems a patient brings. In cases where the diagnosis is
unknown or uncertain or where the psychiatric picture is atypical,
aspects of the medical history, such as living in an endemic area,
hiking, tick exposure, neck pain or past history of a swollen knee
might alert the clinician to the possibility of Lyme disease. If
Lyme disease is suspected, a thorough medical evaluation is
essential.
Among patients presenting to a psychiatrist with a known
diagnosis of Lyme disease, some complaints, such as irritability or
depression with sleep disturbances or hypersensitivity to sensory
stimuli, may be directly related to the disease process. Other
problems, such as depressed mood, feelings of inadequacy, bitterness
or guilt may be secondary effects of having a severe chronic
illness. Such problems may result from alterations in functional
status, loss of social relationships or problematic family dynamics
precipitated by the illness. The psychiatrist may help patients to
address these problems, for instance, by a process of mourning and
acceptance, by cognitive reframing responsibilities. Psychotropic
medications may be helpful as an adjunct to medical treatments for
Lyme disease. Most commonly used are anxiolytics, low-dose
antidepressants for pain and sleep and higher dose antidepressants
for major depression. Given that Lyme disease can cause conduction
abnormalities, it is of particular importance to obtain an EKG
before starting treatment with tricyclic antidepressants.
When patients suffer from irritability related to sensory
hyperacusis, as described earlier, it may be useful to help such
patients identify the triggers and avoid them if possible. It may
also be quite helpful just to explain to patients and/or to family
members that such irritability and the resultant behavior changes
can indeed be a function of the disease. One man developed extreme
irritability related to audirory hyperacusis. His wife recalls
thinking: "This is not the man I married." She doubted that she
could continue to live with him if this personality change were to
persist. Even after he had been treated and returned to normal,
both husband and wife remained uneasy until they found an
explanation for the change: that it had to do with the illness, and
was not some inexplicable, inextricable newly emergent part of the
man himself.
Family therapy may be indicated especially where a sick child is
concerned. Siblings may feel short-changed because of a relative
lack of attention while the sick child may envy - and
resent - his or her siblings for their capabilities and lack of
physical suffering.
Couples therapy may be indicated is some cases. Most patients
report a significant loss of libido. This can lead to frustration,
alienatiion and anger in the spouse, and may in any case make it
difficult for some couples to maintain intimacy. There may be a
diffuse sense of loss on both sides which is then displaced and
experienced as anger or resentment against the spouse. Defenses
that have served the partners well throughout most of their marriage
may be overwhelmed by the manifold adjustments the illness demands;
couples may need help in finding alternative ways of coping and
interacting.
Many patients have felt abandoned by their medical doctors when
the diagnosis was uncertain or the treatment not fully curative.
Others have had to see many different doctors before one was able to
put together the diversity of their symptoms and come up with a
diagnosis. Several patients have said tha the hardest thing to bear
- even more than the pain and disability - had been the feeling that
they were somehow inexplicably altered, in their emotional and
personality and ability to function, without hope of finding a cause
or cure, and without a doctor who could honor their difficulty,
whether or not he or she could solve it. For some patients, then,
the ambiguities surrounding diagnosis and treatment and the
consequent sense of abandonment by medical professionals were among
the most distressing aspects of the illness experience. The
psychiatrist can be of help by lending respectful support to such
patients: by listening and by helping them to clarify their options.
CONCLUSION
In most cases, Lyme disease, when treated early, is a mild illness
with no long-term sequelae. When first identified in its late
stages, however, some of the symptoms of the illness may be less
responsive to antibiotic treatment, resulting in a disabling,
chronic disorder. From the foregoing clinical vignettes, it should
be clear that Lyme disease, particularly when it involves the
central nervous system, can is some patients be an extremely
debilitating, bizarre, terrifying and perplexing disease. It can
present in a great variety of ways, and the symptoms can fluctuate
dramatically and unpredictably. At the same time, there are
patterns to its emergence that can suggest the diagnosis in cases
where laboratory indices are inconclusive. Much uncertainty
surrounds the diagnosis and treatment of Lyme disease at this stage
in its history, and such uncertainty adds to the distress that the
illness causes fo patients. Lyme disease is aptly called the "new
great imitator," and it can imitate psychiatric disorders no less
that medical ones. Psychiatrists working in endemic areas are well
advised, then, to keep Lyme disease in mind as part of their
differential diagnosis for a broad range of disorders including, for
instance, panic attacks, somatization disorder, depression, and
dementia, especially in cases that are atypical or otherwise
suggestive of systemic disease. It should be borne in mind also
that new clincial manifestations of Lyme disease are sill being
discovered and described. In cases of known Lyme disease, it is
important for psychiatrists to take a comprehensive approach to
treatment as so many aspects of the patient's life - physical,
emotional, cognitive, familia, sexual, social and occupational - may
be significantly affected by the illness.
ACKNOWLEDGEMENT
Supported in part by NIMH Research Fellowship to Dr. Fallon
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