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Longterm survey (7 years) in a population at risk for Lyme borreliosis: what happens to the seropositive individuals?

In 1986, a 26% seroprevalence of IgG- anti-Borrelia burgdorferi antibodies was observed among 950 orienteers and the incidence of new clinical infections was 0.8%. In 1993, a total of 305 seropositive orienteers were reexamined. During that time, 15 cases (4.9%) of definite/probable Lyme disease occurred in this seropositive group (12 skin manifestations and 3 monoarticular joint manifestations). Among the 12 definite cases, 9 showed new clinical infections (7 EM, 1 acrodermatitis chronica atrophicans, 1 arthritis), and 3 were recurrent (2 EM, 1 arthritis). The annual incidence (0.8%) in this seropositive group was identical to the incidence observed among the whole population in 1986. The individual antibody titer decreased slightly but the seroreversion rate was low (7%). Serology was not very helpful in identifying clinical cases and evolutions, and it can be stated, that a positive serology is much more frequent in this risk group than clinical disease.

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Heterogeneity of Borrelia burgdorferi in the skin.

The reliability of various in vitro techniques to identify Borrelia burgdorferi infection is still unsatisfactory. Using a high-power resolution videomicroscope and staining with the borrelia genus-specific monoclonal flagellar antibody H9724, we identified borrelial structures in skin biopsies of erythema chronicum migrans (from which borrelia later was cultured), of acrodermatitis chronica atrophicans, and of morphea. In addition to typical borreliae, we noted stained structures of varying shapes identical to borreliae found in a "borrelia-injected skin" model; identical to agar-embedded borreliae; and identical to cultured borreliae following exposure to hyperimmune sera and/or antibiotics. We conclude that the H9724-reactive structures represent various forms of B. burgdorferi rather than staining artifacts. These "atypical" forms of B. burgdorferi may represent in vivo morphologic variants of this bacterium.

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[Livedo racemosa: an unusual late manifestation of borreliosis?].

Classic variants of cutaneous borreliosis are erythema chronicum migrans (ECM), lymphadenosis benigna cutis (LBC) and acrodermatitis chronica atrophicans (ACA). Other dermatoses have been reported in the literature as possibly linked to borreliosis. A 59-year old female patient was seen in the late phases of cutaneous borreliosis with histologically confirmed ACA. In addition, prominent livedo racemosa was seen on the legs, also showing tissue changes similar to those of ACA. Borrelia burgdorferi infection was serologically confirmed by the presence of anti-IgM and anti-IgG antibodies. The clinical spectrum of late cutaneous borreliosis should be enlarged to include livedo racemosa.

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Polyneuropathy in late Lyme borreliosis - a clinical, neurophysiological and morphological description.

In a prospective study, detailed clinical and neurophysiological examinations were performed in 17 patients with polyneuropathy associated with the late borrelial manifestation acrodermatitis chronica atrophicans (ACA). Similar clinical and neurophysiological signs were found in most of the patients. The findings were those of a sensory polyneuropathy, mainly affecting large nerve fibres. Marked abnormality of vibration threshold was a common finding and in 4 patients this raised a suspicion of spinal cord engagement, in addition to a polyneuropathy. Sural nerve biopsy, performed in 3 of the patients, showed a mainly axonal neuropathy. Biopsy findings did not confirm earlier reports of vasculitis of epineural vessels in ACA-associated polyneuropathy.

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[Late manifestations of Lyme borreliosis].

Month to years after an early local or an early disseminated infection some patients develop late manifestations of lyme borreliosis. Most frequently involved organs are the skin (acrodermatitis chronica atrophicans), joints (Lyme arthritis) and the nervous system. A history of exposure and the clinical picture may suggest Lyme borreliosis, however, confirmation by serological and other tests is needed. Antibiotic treatment during early stages normally prevents development of late manifestations. Late stages persist if not treated. By adequate antimicrobial therapy they are treatable and usually show a good prognosis. Recovery may be delayed, some patients suffer from residual difficulties. Currently there is no accepted case definition for a "post lyme syndrome". The term "chronic Lyme disease" suggests (a never proven) persistent infection by viable bacteria. Repeated and prolonged antibiotic treatments are not indicated.

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Ultrastructural differences among spirochetes isolated from patients with Lyme disease and related disorders, and from Ixodes ricinus.

Previous studies on cells of strains B31 isolated in the U.S.A. from Ixodes dammini and strain G25 isolated in Sweden from Ixodes ricinus, showed that their ultrastructure was similar, but not identical. For this reason the studies were extended to spirochetes isolated directly from patients with Lyme disease and related disorders. Included in the present study were three strains isolated from skin, blood and spinal fluid, respectively, from patients with Lyme disease, two strains from patients with erythema chronicum migrans and one strain from a patient with acrodermatitis chronica atrophicans. Three additional strains isolated in Sweden from Ixodes ricinus were also studied. All spirochetes were examined after negative straining with 1% ammonium molybdate. The cells of each individual strain were identical except for one strain isolated from a tick. This isolate was found to consist of two morphologically different spirochetes. Comparison of morphological features of cells from various isolates revealed certain differences. The cells of the different strains could be divided into at least four groups for which cell size and shape as well as number of flagella varied. By morphological criteria, all cells were found to belong to the genus Borrelia.

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Spirochetes in atrophic skin lesions accompanied by minimal host response in a child with Lyme disease.

Acrodermatitis chronica atrophicans, which has rarely been observed in the United States, is a late skin manifestation of Lyme borreliosis. A 12-year-old girl who spent summers on Cape Cod presented with a 2-year history of hyperpigmentation and atrophy of the skin on the hands, wrists, and ankles. The skin biopsy specimen of an affected area showed mild dermal fibrosis, a few inflammatory cells, and spirochetes morphologically compatible with Borrelia burgdorferi. An IgG antibody response to B. burgdorferi could be elicited by immunoblotting, but not by enzyme-linked immunosorbent assay. We conclude that this patient had chronic Lyme borreliosis manifested only by indolent infection of the skin.

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[Chronic atrophic acrodermatitis].

All the 18 patients with acrodermatitis chronica atrophicans (ACA) showed the specific borrelia antibody at the indirect immunofluorescence assay. The patients exhibited a large spectrum of arthritic and neurologic complaints besides the typical cutaneous symptoms. Changes of proteins, of liver-typical parameters and of the electrocardiogram are also assigned to the Lyme-borreliosis. The penicillin therapy - three times accompanied by a Jarisch-Herxheimer-reaction - led to regression of the clinical changes. The secessions of borrelia-antibody-titers happens only very delayed. That is why it can not be used for the direct therapy control. The increased documented polysymptomatic of Lyme-borreliosis requires a wider knowledge and the country-wide possibility of specific diagnostic.

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[Stage-oriented treatment of Lyme borreliosis].

Every manifestation of Lyme borreliosis needs to be treated with antibiotics. The type of antibiotic applied and duration of treatment will depend on the stage and severity of the disease. Erythema migrans, Borrelia lymphocytoma, Lyme arthritis and acrodermatitis chronica atrophicans are primarily treated orally. If neurological symptoms, severe Lyme carditis or eye manifestations are present, intravenous treatment is initially recommended. For oral therapy, doxycycline, amoxicillin, cefuroxime and, if intolerance is shown, azithromycin, are available. For intravenous treatment ceftriaxone, cefotaxime or penicillin G is employed. The overall prognosis for treated Lyme borreliosis is good. However, in particular when manifestations with substantial organic injury have persisted, incomplete healing must be expected. With the exception of erythema migrans, every manifestation should be subjected to a careful diagnostic work-up prior to the start of treatment, because premature antibiotic administration is not only associated with an elevated risk for the patient, but can also mask important diagnostic signs.

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Different genospecies of Borrelia burgdorferi are associated with distinct clinical manifestations of Lyme borreliosis.

Borrelia burgdorferi sensu lato has been subdivided into three genospecies: B. burgdorferi sensu stricto, B. garinii, and B. burgdorferi group VS461. Sixty-eight isolates cultured from patients and 26 strains from ticks were characterized with use of SDS-PAGE, western blotting, and rRNA gene restriction analysis. Fifty-seven of 58 strains obtained from the skin of 70 patients who had erythema migrams or acrodermatitis chronica atrophicans were of group VS461, whereas the genotype of the remaining strain was unidentifiable. Of 10 strains cultured from CSF (n = 3) and skin (n = 7) of 20 patients with extracutaneous symptoms of Lyme borreliosis, nine were B. garinii and one was B. burgdorferi sensu stricto. Of these 20 patients, 17 had neuroborreliosis, one had arthritis and carditis, one had myalgia, and one had erythema and arthralgia. All 26 isolates from ticks were of group VS461. In conclusion, infections due to group VS461 and B. garinii are associated with cutaneous and extracutaneous symptoms, respectively. Our findings suggest that B. burgdorferi genotypes have different pathogenic potentials.

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Joint and bone involvement in Swedish patients with Ixodes ricinus-borne Borrelia infection.

The presence of signs of joint involvement was investigated in 231 patients with erythema chronicum migrans Afzelius (ECMA), in 50 patients with acrodermatitis chronica atrophicans (ACA), in four patients with spirochete-induced facial palsy and in one patient with pericarditis and serologic evidence of Borrelia spirochetal infection. Only one of 16 untreated patients with ECMA developed arthritis. The patient with pericarditis had suffered from arthritis for 2 months when the cardiac symptoms developed. Thirteen of the patients with ACA had luxations/subluxations of small joints in the hands or feet and/or arthritis in large joints. In four of the patients with ACA, periosteal thickening of bones was found. The results indicate that joint abnormalities are not uncommon in patients with ACA. However, arthritis during the first year of tick-borne spirochetal infection was less common in Sweden than has been reported among patients with Lyme disease in the United States.

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Peripheral nerve disorders in Lyme-Borreliosis. Nerve biopsy studies from eight cases.

Clinical, cerebrospinal fluid and nerve biopsy findings from eight patients with peripheral nervous system complications of Lyme-Borreliosis are reported. Five cases showed the typical features of the Garin-Bujadoux-Bannwarth syndrome (meningoradiculoneuritis), one patient had a multiple mononeuritis associated with acrodermatitis chronica atrophicans Herxheimer. Two cases could not be classified under these diagnostic categories. In all patients we observed a prompt relief of signs and symptoms after antibiotic treatment. Nerve biopsy studies showed gross infiltrations of epineurial vasa nervorum and small infiltrations around endoneurial capillaries. The infiltrations consisted of lymphocytes, histiocytes and plasma cells. We did not find necrotizing changes of the vessel walls, but thrombosis and recanalization was observed in some epineurial vessels. Seven biopsies showed a significant loss of myelinated axons due to axonal degeneration. Only in one biopsy did we observe segmental demyelination next to axonal degeneration. We conclude that the PNS complications of Lyme-Borreliosis in early and late stages of the disease are angiopathic due to vasculitis of the vasa nervorum and primarily caused by axonal degeneration.

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Comparison of flagellum and sonicate antigens for serological diagnosis of Lyme borreliosis.

A sonicate antigen and two concentrations of a purified flagellum antigen of Borrelia burgdorferi were compared for serological diagnosis of Lyme borreliosis by an enzyme immunoassay (EIA). Generally, the higher concentration of flagellum antigen was found to be superior to the lower concentration, which was diluted eight times compared to the higher concentration. The diagnostic sensitivity for IgG antibody detection increased from 13% in the sonicate EIA to 31% in the best flagellum EIA assay (p = 0.01) in sera from patients with erythema migrans (n = 70), and from 34% to 55% (p = 0.01) in sera from patients with neuroborreliosis (n = 77). However, the sensitivity for IgG in sera from patients with acrodermatitis chronica atrophicans (n = 20) was high in both assays: 90% in the sonicate EIA compared to 95% in the flagellum EIA. Regarding IgM, there was no significant difference between the sensitivity of the assays in sera from any of the patient groups. The sensitivity values for IgM and IgG in cerebrospinal fluid (CSF) from patients with neuroborreliosis were also without significant differences. Sera and CSF from patients with meningitis/encephalitis of non-Borrelia etiology (n = 35), multiple sclerosis (n = 9) or syphilis (n = 24), served as controls. The flagellum EIA showed a significantly improved specificity for IgG in CSF from controls with syphilis (p less than 0.01). It is concluded that purified Borrelia burgdorferi flagellum antigen is superior to a sonicate antigen, especially for serodiagnosis of the early stages of Lyme borreliosis.

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Why is chronic Lyme borreliosis chronic?

Chronic Lyme borreliosis (CLB) can present not only in different organs but also in different patterns. Although many theories exist about the mechanisms leading to CLB, it is known that viable Borrelia burgdorferi can persist for decades and cause late skin manifestations of acrodermatitis chronica atrophicans (ACA). Thus, the immunopathogenetic findings in ACA can serve as a model for studying the chronic course of Lyme borreliosis. Recent findings indicate that the most important cell for antigen presentation, the epidermal Langerhans cell (LC), is invaded by B. burgdorferi in early Lyme borreliosis. Therefore, LCs were stained immunohistochemically with different markers to investigate their functional activity. Numbers of CD1a+ LCs were reduced in erythema migrans but normal or slightly elevated in ACA. In both diseases there was also a marked downregulation of major histocompatibility complex class II molecules on LCs, as measured by staining of human leukocyte antigen DR. This phenomenon might be a mechanism that protects against the presentation of autoantigens and may be the cause of the impaired capacity of LCs to eliminate B. burgdorferi antigens, thus explaining why CLB is chronic.

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[Serodiagnosis in dermatological diseases in Borrelia burgdorferi infections].

185 patients with dermatological symptoms of Borrelia burgdorferi infection (erythema migrans, lymphadenosis cutis benigna, acrodermatitis chronica atrophicans) and morphea were examined for Borrelia burgdorferi antibodies; in addition, sera from 173 patients were tested for exclusion of Borrelia infection. Commercially available immunofluorescence tests and enzyme immunoassays supplied by four different companies were evaluated. To investigate the specificity of these assays, sera of 34 patients with syphilis in different stages and sera from 98 control persons were examined. None of the assays evaluated was suitable for the diagnosis of early infection (sensitivity 4-35%). However, they are more reliable for the diagnosis of late infection (sensitivity 56-100%). The variation in specificity between the different assays was 82-100%. Crossreactions with Borrelia burgdorferi antibodies occurred frequently in patients with syphilis (3-47%). The reliability of serological assays should be improved by antigen purification and combination of screening and confirmatory assays. After treatment the decline in IgG and IgM antibodies is very slow.

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[Chronic atrophic acrodermatitis; a deceptive form of Lyme borreliosis].

Acrodermatitis chronica atrophicans (ACA) was diagnosed in 15 patients from the southern and eastern part of Friesland (the Netherlands). Twelve patients had one leg affected; three had more than one extremity involved. Frequent complaints were fatigue, paraesthesia, swelling and blue discoloration. The symptoms persisted for many years in most cases. The inflammatory stage was observed most frequently (13/15): violet-blue erythema, oedema, firm swelling and nodules. Atrophy (4/15) was observed once in the form of a scleroderma-like lesion. Neuropathy was found in five patients. Histological investigation showed infiltration with lymphocytes and plasma cells (13/15) and atrophy (2/15). Spirochaetes were demonstrated in biopsies of 13 patients. Specific antibodies against Borrelia burgdorferi were found in all patients. ACA appears to be not infrequent and must be distinguished from other inflammatory and vascular diseases, such as chronic venous insufficiency.

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[Serodiagnosis of Lyme borreliosis: antibody titer and specificity in the IFT and western blot].

Out of 334 sera from healthy persons from northern Bavaria 6% reacted positive in the indirect immunofluorescence test (IFT, titre greater than or equal to 1:64). The percentage of positive cases in patients with erythema chronicum migrans (ECM), meningoradiculitis (M. Bannwarth), or acrodermatitis chronica atrophicans (ACA) was 43, 83 and 78%, respectively. In other patients with less characteristic symptoms in which an infection with B. burgdorferi was suspected the number of positive cases was only about 20%. A positive IgM-IFT was most often associated with ECM and M. Bannwarth; however, even in these cases IgM was only found in 30%. The serodiagnosis of Lyme disease required simultaneous serum testing of T. pallidum antibodies (TPHA) to exclude a syphilis with cross-reacting antibodies. In cases with a positive B. burgdorferi-IFT and TPHA the final diagnosis of Lyme disease was possible on the basis of Western blot analysis. The prominent antigens detected by sera from patients with Lyme disease--but not with syphilis--had molecular weights of 18, 22, 41 and 60 K; IgM antibodies were mainly directed against the 22 K and 41 K antigens. The antigen pattern was not characteristic for different disease stages.

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[Borrelia infections from a dermatological viewpoint].

Erythema migrans (EM), Borrelia lymphocytoma (BL) and acrodermatitis chronica atrophicans (ACA) are the established dermatological manifestations of borrelia infection, a complex multiorganic disease. Analogous to syphilis Borrelia infection can be classified by three stages, at which stage I (localized infection) and II (disseminated infection) are manifestations of early infection and stage III (persistent infection) a symptom of late infection. At all stages skin manifestations can be present, the above mentioned as stage-marker as well as other non-specific polymorphous skin lesions which sometimes appear at stage II. Because of its frequent (60-80%) occurrence in all borrelia infections EM has a pathognomonic importance for borrelia infection. In diagnosis serology is currently the only practical laboratory aid. False negative and false positive results must be considered. Treatment of choice is ceftriaxone, penicillin G (or amoxycillin) or tetracycline. Prophylactic antibiotic therapy for tick bites is not recommended. Congenital borrelia infections seem to be unusual, but it is likely that they can occur and cause different adverse fetal outcome or abortion.

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