As with a vast majority of the total studies done on Morgellons, Lyme Disease is a key clue to the disorder.
***********************
Clin Cosmet Investig Dermatol. 2011; 4: 167–177.
Published online 2011 November 14. doi: 10.2147/CCID.S26183
PMCID: PMC3257881
Filament formation associated with spirochetal infection: a comparative approach to Morgellons disease
This article has been cited by other articles in PMC.
Abstract
Bovine
digital dermatitis is an emerging infectious disease that causes
lameness, decreased milk production, and weight loss in livestock.
Proliferative stages of bovine digital dermatitis demonstrate keratin
filament formation in skin above the hooves in affected animals. The
multifactorial etiology of digital dermatitis is not well understood,
but spirochetes and other coinfecting microorganisms have been
implicated in the pathogenesis of this veterinary illness. Morgellons
disease is an emerging human dermopathy characterized by the presence of
filamentous fibers of undetermined composition, both in lesions and
subdermally. While the etiology of Morgellons disease is unknown, there
is serological and clinical evidence linking this phenomenon to Lyme
borreliosis and coinfecting tick-borne agents. Although the microscopy
of Morgellons filaments has been described in the medical literature,
the structure and pathogenesis of these fibers is poorly understood. In
contrast, most microscopy of digital dermatitis has focused on
associated pathogens and histology rather than the morphology of
late-stage filamentous fibers. Clinical, laboratory, and microscopic
characteristics of these two diseases are compared.
Keywords: Digital dermatitis, Morgellons disease, Lyme disease, Borrelia burgdorferi, spirochetes
Introduction
First
described in 1974, bovine digital dermatitis (BDD), also known as
papillomatous digital dermatitis, is an emerging infectious disease that
causes lameness, decreased milk production, and weight loss in cattle.1,2
Since 1993, BDD has spread rapidly throughout the US, Europe, and
Australia, becoming a significant cause of morbidity in dairy
operations.3–5
The disease causes dermatitis and papillomatous lesions of the skin
bordering the coronary band in the hooves of livestock, primarily cattle
(Figure 1).3–5
Bovine
digital dermatitis. Note painful ulcerating lesion above the
interdigital cleft of the hoof with multiple grayish fibers (top) and
closer view of fibers (bottom). Photographs courtesy of GEA Farm
Technologies, reprinted with permission.
Histologically, the lesions resemble those of yaws, which suggests spirochetal involvement,5,6 and cattle with BDD are reported to be serologically reactive to Borrelia burgdoferi antigens.7,8
Consistent detection of spirochetes in the lower dermal layers adds
further weight to the etiological involvement of these bacterial agents.9–16 Proliferative or late-stage lesions demonstrate hyperkeratosis and proliferation of keratin filaments4 as well as elongated keratinocytes.17
The proliferation of keratin filaments that may reach several
centimeters in length has led to the disease receiving descriptive
common names, such as “hairy heel warts” (Figure 1).18
Morgellons disease is an emerging human dermatological disorder that parallels BDD in many aspects (Tables 1 and and2).2).
In addition to a spirochetal association, Morgellons disease is
characterized by dermatological lesions associated with filament
formation (Figure 2). Symptoms such as fatigue, neurological disorders, and joint pain suggest systemic involvement as well as dermopathy.19–22
Peripheral neuropathy, delayed capillary refill, abnormal Romberg’s
sign, decreased body temperature, tachycardia, elevated proinflammatory
markers, and elevated insulin levels are reported to be objective
clinical evidence of the disease.23
Morgellons
disease. Note painful ulcerating lesions on hand (top) and subcutaneous
white and blue fibers (bottom, 60× magnification). Photographs courtesy
of the Charles E Holman Foundation, reprinted with permission.
The
hallmark of Morgellons disease is “mysterious” fibers of unknown
etiology, easily visualized with the aid of a 60× hand-held digital
microscope, that appear both in nonhealing or slow-healing skin lesions
and beneath unbroken skin (Figure 2).
The fibers resist extraction, and attempts to remove them may cause
shooting pain. Patients with the affliction may experience crawling and
stinging sensations from under their skin.19–21
Immune deficiency and the presence of inflammatory markers indicating
cytokine release suggest that an infectious process is involved,24 and Morgellons disease has been associated with spirochetal infection.25 These patients often have positive B. burgdorferi Western blots or Lyme-like symptoms, suggesting a high likelihood of Lyme borreliosis.20,25
A
key difference between BDD and Morgellons disease is the veterinary
community’s response to BDD versus the medical community’s response to
Morgellons disease. While digital dermatitis has been the subject of
extensive scientific investigation, unravelling the “mystery” of
Morgellons disease has been hampered by claims that it results from
delusions of parasitosis,26–28 and meaningful scientific studies have been carried out by only a handful of investigators.20,22,24,29,30
This report compares the clinical and laboratory features of the veterinary and human diseases.
Morgellons disease
History
Morgellons
disease is a name given to an emerging, unusual dermopathy by Mary
Leitao, a housewife who had previously worked as a laboratory
technician. In 2001, her two-year old son suffered from lesions that,
upon microscopic examination, revealed red, blue, white, and black
fibers.
The name came from a monograph entitled “A Letter to a Friend”
by Sir Thomas Brown in 1690 describing an illness characterized by
“outbreaks of harsh hairs” on the backs of children in Languedoc,
France. In 2004, after apathy and dismissal by numerous doctors
(including Dr Fred Heldrich from Johns Hopkins University, who suggested
that Leitao might suffer from Munchausen by proxy syndrome), she
founded the nonprofit Morgellons Research Foundation to raise awareness
and funding for research into this disfiguring and disabling condition.20,21,31–33
Many physicians continue to equate Morgellons disease with delusions of parasitosis.34–37
It is unknown when this disease first appeared, but descriptions of
delusions of parasitosis date back to the 1950s and 1960s. Some of these
early cases mention “threads” or other debris coming from skin and
failure of psychotherapy, and thus may have been cases of Morgellons
disease.38
The 2006 report by Savely et al of a patient who had Morgellons disease
for 20 years provides evidence that the disease dates to the mid 1980s.20
Morgellons
disease has been debated publicly through extensive media coverage,
including television segments on major networks, and it was the cover
story of the Washington Post magazine on January 26, 2008.39–43 The disease was also featured in the popular science magazine “New Scientist”.27
This media coverage has led some physicians to blame the Internet for
spreading beliefs of parasitosis and causing the increase in
self-diagnosed Morgellons disease sufferers.44–46 Studies attempting to elucidate the disease process and its etiology appear to be hampered by the ongoing heated debate.
In
2006, pressure from the Morgellons Research Foundation prompted the US
Centers for Disease Control and Prevention (CDC) to announce that it had
launched an investigation. In May 2007, Dan Rutz, a CDC communication
specialist, was quoted as saying in a television interview, “There is
nothing to imply there is an infectious process, but our mind is open to
everything, including that remote possibility”.26
After issuing a preliminary report in 2009, the CDC declared in 2011
that data analysis was complete and had been submitted for publication
in a peer-reviewed journal. To date, the results have not been publicly
disclosed.25,47
Clinical aspects
Patients
with Morgellons disease frequently describe crawling, stinging,
insect-like sensations, or sensations of “something trying to penetrate
the skin from the inside out”.20,25
These sensations are accompanied by slow-healing skin lesions that
appear spontaneously. Skin lesions can be minor to disfiguring and
associated with fibrous material either in strands or balls of wound-up
fibers.20,25
Granules have been observed that may demonstrate attached fibers.
“Black specks” or “black oil” associated with lesions have been
reported. Fibers may be present under unbroken skin as well as in
lesions and scabs.20,25 Microangiomas found upon examination are reported.24 Healed lesions demonstrate hyperpigmented scar tissue.25 Patients report changes to their hair48 and changes to finger and toenails.49
The nail changes in Morgellons disease resemble those associated with
syphilis. In that condition, the nail wall becomes raised, with
inflammation and suppuration of tissue surrounding the nail resulting in
nail plate destruction, separation of the nail, and defective growth at
the nail matrix.50 Nail changes in Morgellons disease provide further evidence of spirochetal involvement, as noted above.
Patients
with Morgellons disease experience symptoms consistent with systemic
pathology, including fatigue, cognitive disability (described as “brain
fog”), fibromyalgia, joint pain, vision decline, neurological disorders,
hair loss, disintegration of teeth, intermittent fever, low body
temperature, and sleep disturbances.20,24,48
Frequent physical findings include reduced exercise capacity,
peripheral neuropathy, delayed capillary refill, abnormal Romberg’s
sign, decreased body temperature, cardiac arrhythmias, and tachycardia.23
Many patients with Morgellons disease report inability or impaired
ability to work. Most patients have been diagnosed with psychiatric or
psychosomatic illness, and report that physicians are dismissive and
attribute lesions to delusional parasitosis and self-mutilation.20,24,48
While some patients with Morgellons disease do demonstrate behavioral
aberrancies including a delusional component, many do not, and
psychiatric manifestations are possibly from an underlying pathogenic
process.22
Symptoms in some patients such as headaches, visual abnormalities,
short-term memory loss, and emotional lability are consistent with
central nervous system involvement.24
Patients
with Morgellons disease regularly demonstrate abnormal laboratory
findings, including occasional low-grade anemia, test results indicating
endocrine dysfunction such as diabetes and thyroid dysfunction, test
results indicative of immune dysfunction such as low CD57+ natural
killer cells and inflammatory markers, such as elevated C-reactive
protein, complement C4a, tumor necrosis factor-alpha, interferon-gamma,
and interleukin-6.23,25
Distribution and predisposing factors
According
to the Morgellons Research Foundation, there are over 15,000
self-identified sufferers from 15 countries including the US (all 50
states), Canada, the UK, Australia, South Africa, and the Netherlands.
In the US, most cases are reported from California, followed by Texas
and Florida.25,48
The prevalence of Morgellons disease in southern coastal areas of the
US suggests that the incidence is greater in moist humid climates. The
disease appears to be more prevalent in the northern hemisphere.48
Some family members of patients with Morgellons disease experience the
above symptoms with or without associated dermal lesions, and have also
reported similar symptoms in family pets.20,24
This implies that the disease may be infectious in nature and
transmitted from person to person or transmitted from an inciting agent
during familial environmental exposure.
Contact with soil or unsanitary
environmental conditions appears to be a contributing factor.20,24 Onset has been associated with rural residence or recent rural travel.24
Although findings by the Morgellons Research Foundation indicate that
Morgellons disease affects equal numbers of males and females, other
studies have indicated that this disease is more prevalent among
middle-aged Caucasian women.25
Pathophysiology
Skin biopsies typically reveal nonspecific pathology or inflammatory processes with no observable pathogens,20 although hyperplasia has been reported,49 and histology may therefore resemble that of yaws lesions.6
A forensic scientist from the Tulsa Police Crime Laboratory in
Oklahoma, US, could not find a match with known fibers in the national
data base for the Federal Bureau of Investigation.26
Spectroscopic analysis could not match the fibers with any of 880
compounds commonly used in manufactured commercial fibers, and
dye-extracting solvents failed to release coloration.27
The fibers have been shown to be very strong and heat-resistant, so
much so that attempts to analyze contents by gas chromatography were not
possible.27,30
Microscopy of fibers reveals a white, blue, red, purple or black
coloring and a “metallic-looking” sheen. They may also appear to be
coated with minerals, and do not demonstrate a cellular structure.29,30
Fibers associated with skin have been shown to emerge or stab through
skin and skin lesions, and some appear to have grown from hair
follicles.29,30 These fibers also fluoresce under ultraviolet light.30
There is a suggestion that the fibers may contain cellulose. 20
A cellulose-protein complex was identified as a minor constituent of
mammalian connective tissue, with increased amounts of such material
noted in tissues from scleroderma patients and patients with other
pathological skin conditions.51 The cellulose-producing plant pathogen Agrobacterium
has been shown to infect nonplant species including humans, and
polymerase chain reaction screening of tissue samples from five patients
with Morgellons disease indicates the presence of Agrobacterium genes, implying a possible etiological involvement.29,52
However, further polymerase chain reaction testing has yet to reveal a
link between tissue samples and pathogens, showing no significant
statistical difference between negative controls and patients with
Morgellons disease.30
There
is a connection between Morgellons disease and Lyme disease, because
the majority of patients with Morgellons disease demonstrate serological
reactivity with B. burgdorferi proteins in Western blots20,25 or have a high probability of a Lyme disease diagnosis based on meeting defined criteria for the diagnosis.25 In addition, Morgellons disease is associated with positive serological evidence of coinfecting tick-borne pathogens, such as Babesia spp, Anaplasma phagocytophilum, Ehrlichia chaffeensis, and Bartonella henselae.25 Further evidence of a bacterial etiology is the fact that patients with Morgellons disease respond to antibiotic therapy.20,23
Bovine digital dermatitis
History
Evidence
that spirochetes are associated with livestock lameness was first
described by Breveridge in 1936 when he isolated spirochetes from sheep
footrot in Australia.53
In 1966, an outbreak of foot infection associated with spirochetes in
Australian dairy cattle was described by Egerton and Parsonson.54
However, BDD was first reported as an emerging disease in the early
1970s when an outbreak of ulcerative proliferative lesions was reported
in Italy.1 The disease has since spread throughout Europe and the UK.9,55–57 It was first identified in the US in New York State in 1974 and has since spread throughout the US and Canada.2,17 The incidence and prevalence continue to rise rapidly.15,16
In a 1998 incidence study in the US, BDD was reported in 43% of US
dairy herds. Of infected herds, 78% had reported that the infection
first occurred in 1993 or later.2
It is hypothesized that spirochetes occurring naturally in the farming
environment without causing significant pathology for many decades
suddenly appeared as an emerging disease entity through some triggering
event or process, causing a pathogenic upshift in the Treponema spp associated with BDD.15,16
Clinical aspects
BDD is a major cause of lameness in dairy cattle and causes decreased milk production, loss of body condition, and weight loss.1,3
The pathology of the disease may be mild, with no obvious lameness,
moderate, with afflicted cattle walking on their toes, or
incapacitating.58 Atrophy of heel bulbs and clubbed hooves may result from infection.58 Sheep with digital dermatitis may suffer undercutting of the hoof wall and complete shedding of the hoof.59 BDD is described as superficial digital dermatitis at the coronary margin3. It is most often seen on the posterior border of the interdigital space midway between the heel bulbs.60,61 Most lesions appear on the hind feet62 but may affect all four feet.58
The diagnostic criteria of BDD are parakeratotic hyperkeratosis,
epidermal acanthotic hyperplasia, ulcerated dermal papillae tips, and
invasion of the stratum spinosum and dermal papillae by spirochetes
identified as Treponema spp.63 Lesions are said to bear a resemblance to those of yaws,58 and cattle with BDD are serologically reactive to B. burgdoferi antigens,7,8 suggesting a spirochetal association.
Early
erosive lesions are characterized by wet eczema with matting of
superficial hairs, hyperemia, and swelling that develops into erosive
dermatitis. At this stage, the surface level is flat or lower than the
epithelial level (concave). Lesions are painful and bleed easily.64,65
As the disease progresses, granulomatous lesions develop, marked by
ingrowth of keratin pins on the erosion surface and progressive
keratinization. Lesions may rise above the epithelial level as their
diameter increases and are less prone to bleeding.13
In late chronic infection, proliferative lesions are characterized by
pronounced rete ridge formation with broad-based tips at the
dermoepidermal border, hyperplasic stratum corneum, acanthotic stratum
spinosum, scarce keratohyaline granules, and horny columns in
hemorrhagic cell detritus, with empty vacuoles in the stratum
granulosum, neutrophils in the epidermis, and plasma cells in the
dermis.13 Projections consisting of elongated, ballooned, necrotic, or keratinized keratinocytes can be seen,17 with proliferation of keratin filaments reaching up to several centimeters in length.18
Diagnosis of BDD remains clinical, because serological tests lack sensitivity and specificity.17,18
After treatment, lesions may regress and form dark, rubbery, firm scabs
that eventually fall off. Healing can vary depending on the severity of
the lesion prior to treatment. Skin may be smooth, have remnant scar
tissue, or may remain hyperkeratotic. Reactivation may occur if
regression is incomplete.4 Treatment includes cleaning, antibiotic sprays, and antibiotic and formalin foot baths.18 Parenteral antibiotics are of limited effectiveness, costly, and involve milk-withdraw time, so are seldom used.9,17,18
Etiology and pathophysiology
The
etiology of BDD is thought to be multifactorial, involving spirochetal
infection, coinfection with other bacteria, and environmental conditions
that favor the establishment of infection. Treponeme spirochetes are
associated with BDD and have been repeatedly characterized and isolated
from BDD lesions,9,11–16,65–67
and involvement with multiple treponeme species has been reported,
including some species that are phylogenetically related to human
isolates.15–17,68
Spirochetes within necrotic and outer proliferating epidermal cells
appear to be invasive. Healthy tissue is not associated with
spirochetes, and other bacteria are limited to necrotic layers.13,17 This suggests a primarily spirochetal infection, and the significance of coinfection with other bacteria is debated.15–17
Bacteria that have been isolated from BDD lesions and may be cofactors in establishing infection include Bacteroides spp,9,69 Campylobacter spp,13,61 Dichelobacter nodosus,11 Fusobacterium necrophorum, Fusobacterium nucleatum, Porphyromonas levii, and Prevotella spp.70,71 Early attempts at experimental infection with injected tissue homogenates failed.17,60,72
Subsequently successful experimental infection using a BDD tissue
homogenate was achieved in calves. Continual wetting and wrapping of the
epidermis created a hydropic and relatively anaerobic environment
favorable for establishing treponeme infection.58
Experimental induction of BDD lesions was recently achieved using pure
cultured treponemes free of other bacteria, an observation that supports
a primary role for spirochetes in this disease.73
Treponeme
phylotypes involved with BDD are more closely related to human oral and
genital treponemes than to those identified in the bovine
gastrointestinal tract. Spirochetes that resemble Treponema phagedenis are most commonly associated with BDD globally and are most similar to the human genital strain T. phagedenis. Studies involving phylogenetic clustering of BDD spirochetes have revealed other strains related to Treponema denticola, Treponema vincentii, Treponema putidum, Treponema medium, and Treponema pedis.74–79
Distribution and predisposing factors
All ages and breeds are susceptible to BDD.80 Holstein and Friesian cows are the most susceptible, especially lactating heifers and three-year-old cows.5,55,56,80,81 This suggests that hormones may play a role in susceptibility to infection.5
Although many beef cattle end up in feedlots that are unsanitary, which
would be expected to provide favorable conditions for infection, these
animals are rarely affected.82
Infection
is associated with wet environments, muddy corrals, and poor animal
husbandry. In Californian herds, an increased rate of infection is seen
in late spring to early summer, 1–3 months after the start of the rainy
season when most affected cows have been standing in manure-rich slurry.5
After a farm has become infected, BDD cannot be eradicated and
recurring infection is likely, especially in newly introduced heifers.83
Spirochetes have been detected by polymerase chain reaction in all
stages of healing and they are not completely eradicated by treatment.84
It is hypothesized that environmental conditions related to poor
hygiene (contact with wet slurry and fecal ammonium and microtrauma)
favor spirochetal infection and an increased incidence of disease.15,16
Discussion
The
fact that unusual fiber or filament production is associated with
spirochetal infection in BDD might suggest that a similar process is
involved in Morgellons disease. Patients with Morgellons disease have
evidence of spirochetal infection demonstrated by serological reactivity
to B. burgdorferi antigens, clinical Lyme diagnosis, and
symptoms consistent with Lyme disease. Both BDD and Morgellons disease
appear to have a multifactorial etiology involving spirochetes and
coinfecting pathogens. They are both emerging, rapidly spreading
diseases. Both BDD and Morgellons disease are predominantly found in
females, and a female predominance in patients with persistent Lyme
symptoms has likewise been demonstrated.25
BDD
is recognized by veterinarians to be an important cause of morbidity in
dairy cattle, causing a significant financial loss for the dairy
industry and justifying the degree of research attention it has
received. In the case of Morgellons disease, mainstream medicine has
written off people with unexplained dermopathy as delusional. Media and
the Internet are said to be factors contributing to its increasing
incidence and geographical spread. The Internet through its ability to
instantly disperse information, reliable or not, is blamed for
misinforming patients and causing support of disease beliefs that are
said to lack scientific evidence.44–46
The lack of a universally accepted clinical definition for Morgellons
disease has resulted in patients with various diseases, some psychiatric
and others not, being categorized together in many studies.85
On the other hand, the few researchers who have examined patients
exhibiting dermopathy with fibers that are subcutaneous or imbedded in
lesions have provided convincing evidence that the disease is not
self-inflicted and that a pathogen may be involved.20,25
Some patients with itchy dermopathy can be expected to scratch lesions,
but that does not mean that an underlying pathology does not exist.
Both
BDD and Morgellons disease demonstrate unusual dermal filaments or
fibers, and both appear to be associated with spirochetal infection. In
the case of BDD, spirochetal infection is the primary etiological agent
for the disease, but other factors and coinfection with other pathogens
are required before pathology can occur. In human periodontal disease,
spirochetal infection is preceded by infection with proteolytic Gram
negative bacteria, and the resulting inflammation creates anaerobic
conditions favorable for spirochetal invasion.74–76
This also appears to be the case in BDD. Large numbers of environmental
organisms, anaerobic conditions, and microtrauma allow treponemes to
penetrate into deep epithelial strata.15,16
The link between Morgellons disease and onset associated with
unsanitary or dirty conditions and increased incidence in wet
geographical areas suggests that environmental organisms from that type
of habitat may play a role in Morgellons disease.20,25 B. burgdorferi
infection has been linked to Morgellons disease, and spirochetes have
been linked to fiber formation in BDD. Therefore, it is reasonable to
hypothesize that spirochetes are involved with fiber formation in
Morgellons disease.
In BDD, keratinocytes have been shown to activate cytokine production and influence inflammatory markers.8 Morgellons patients also demonstrate inflammatory markers that indicate cytokine release.23,24
In
chronic BDD infection, there is evidence that spirochetes damage
keratinocytes, resulting in the formation of unusual keratin fibers.15,16 Spirochetes have been shown to activate cytokines and other inflammatory markers.86 Keratinocytes influence inflammatory cell movement and retention in the epidermis via cytokine release.87,88 Tissue damage is aggravated by neutrophil infiltration, inflammatory mediators, and cytokines.15,16
Epidermal proliferation, hyperplasia, and influx of neutrophils,
monocytes, and lymphocytes result in damage to keratinocytes and
production of abnormal keratin filaments. The production of
keratinolytic toxins by treponemes has been proposed8 and B. burgdorferi has been shown to stimulate inflammatory chemokine secretion.89,90
Of note, treponemes cannot be detected in tissue from tertiary syphilis
lesions, even though it is an undisputed fact that infection with
treponemes is the cause of the dermopathy. Damage to keratinized
tissues, hair, toenails, fingernails, and skin has been demonstrated in
tertiary syphilis in the absence of detectable spirochetes.50,91–94
There is strong evidence that Morgellons is not a delusional disease.20,25
Fibers are found under unbroken skin, indicating that they are not
self-inflicted. Because they are not self-implanted textile fibers, they
must be produced within the skin. The lack of detectible pathogens in
lesions suggests also that fibers are human cell products.20,25
Keratinocytes are the cells most likely to produce these fibers. They
are the predominant cells found in skin, and they are found in hair
follicles. Fibers have been found embedded in and piercing skin, and
they have been observed growing out of hair follicles. Recently we
examined patterns of fiber formation in patients with Morgellons
disease, and we found that these fibers possess physical and microscopic
characteristics of keratin, often with elaborate shapes and reflected
colors (Figure 3). The results of our investigation will be described in a forthcoming paper.
Morgellons
fibers at 100× magnification. Note floral-shaped fibers on external
surface (top) and pavement epithelium on internal surface (bottom) of
epidermal section.
In view of the
above discussion, there is evolving evidence that Morgellons fibers have
physical properties consistent with keratin. Keratin and chitin are the
strongest known biofibers, and keratin shows no cellular structure.
Likewise Morgellons fibers are very strong and show no cellular
structure, consistent with keratin filaments. They are colored blue,
red, purple, and black, which are all colors found naturally in keratin.
Solvents have not been able to extract pigments. Keratin can
demonstrate different colors including blue, red, and purple, not from
pigment production but from microscopic refractive structures that
produce constructive interference of light diffracting from structural
layers.95 Bacteria have been shown to influence and enhance color intensity in keratin.96
The fibers demonstrate a “metallic-looking” sheen, consistent with
keratin and iridescent coloring. Morgellons fibers fluoresce under
ultraviolet light, a property that has been observed to occur with
keratin fibers.97,98
Thus keratin composition may explain the “mysterious” fibers in
Morgellons disease. The etiopathogenesis of these fibers remains to be
determined.
Conclusion
BDD
and Morgellons disease demonstrate complex multifactorial etiologies.
In the case of BDD, the etiology is primarily spirochetal with
coinvolvement of other bacteria, while in patients with Morgellons
disease, clinical Lyme diagnosis and serological detection of B. burgdorferi
points to spirochetal infection, and laboratory evidence suggests
coinfection with other tick-borne pathogens. Microscopic studies and
physical evidence suggest that Morgellons disease might have a similar
pathology to BDD.
Proliferative BDD lesions demonstrate
keratinocytes producing abnormal keratin fibers that may reach several
centimeters in length. Morgellons disease likewise demonstrates unusual
fiber formation in skin and hair follicles where keratinocytes are the
predominant cells. Evidence indicates that keratinocytes are the most
likely source of the “mysterious” Morgellons fibers, and that these
fibers are likely composed of keratin. Keratin is consistent with the
microscopic, chemical, and physical properties demonstrated by
Morgellons fibers. The lack of obvious spirochetal infection in
Morgellons lesions does not preclude their involvement in the disease
process; spirochetes are not easily detectable in secondary syphilis
lesions and are rarely if ever detected in tertiary syphilis lesions.
Spirochetes do not have to be identifiable in lesions to cause
dermopathy.
BDD and Morgellons disease are evolving pathologies that share a remarkable number of similarities (Tables 1 and and2).2).
While scientific research has elucidated many clinical and laboratory
features of BDD, much of the mystery surrounding Morgellons disease has
yet to be resolved. The belief held by mainstream medicine that
Morgellons disease is a delusional psychiatric illness deters scientific
investigation concerning this phenomenon. Morgellons disease does not
appear to be a delusional disease, as demonstrated by fibers occurring
under unbroken skin, and patients with Morgellons disease have clinical
and laboratory evidence indicating an infectious inflammatory disease
process similar to BDD. Comparison between these emerging pathologies
may reveal the secrets behind the human dermopathy.
Acknowledgments
The
authors thank Gordon Atkins, Robert Bransfield, Dorte Dopfer, Doug
Kahn, Alan MacDonald, Peter Mayne, Deryck Read, Janet Sperling, Michael
Sweeney, and Randy Wymore for their helpful discussions. We are grateful
to Harriet Bishop and Cindy Casey for providing first-hand information
about Morgellons disease, and Lorraine Johnson for manuscript review.
Footnotes
Disclosures
RBS
serves without monetary compensation on the medical advisory panel for
QMedRx Inc. He has no financial ties to the company. MJM has no
conflicts of interest to report.
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