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Migratory erythema (Lyme borreliosis). Clinicoepidemiologic features of 50 patients.

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Erythema migrans (EM) is the earliest and most common manifestation of the infection caused by B. burgdorferi (
Lyme borreliosis). The objective of the present work was to report the clinicoepidemiological features in a series of patients.


Retrospective collection of clinicoepidemiological features of the first fifty patients diagnosed of EM at La Rioja Hospital (March 1989-September 1998).


In our series, no differences were observed regarding sex or living in a rural or urban area. Mean age was 41 years (range 9 to 78). In 70% of patients the antecedent of a tick bite was obtained and the incubation period was 6.48 days (1 to 15 days). The mean size of the lesions was 14.3 cm (5 to 40) and in 16% of patients satellite cutaneous lesions were observed. The areas where EM appeared were lower limbs and the perineal region (60%), chest (24%), head and neck (10%) and upper limbs (6%). Forty-eight percent of patients reported extra-cutaneous manifestations. All cases occurred during the spring, summer and autumn months, with a peak in June. The most common referred antecedent was walking in forest areas. All patients responded to antibiotic therapy.


EM is common in the studied environment and presents with a marked polymorphism.

Rev Clin Esp. 2000 Feb;200(2):60-3. English Abstract

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