title: [Migratory erythema (Lyme borreliosis). Clinicoepidemiologic features of 50 patients].
abstract: OBJECTIVE
  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.
  
  
  METHODS
  Retrospective collection of clinicoepidemiological features of the first fifty patients diagnosed of EM at La Rioja Hospital (March 1989-September 1998).
  
  
  RESULTS
  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.
  
  
  CONCLUSIONS
  EM is common in the studied environment and presents with a marked polymorphism.
authors.affiliation: Servicio de Medicina Interna y Enfermedades Infecciosas, Hospital de La Rioja, Logroño.
authors.forename: J A
authors.initials: JA
authors.lastname: Oteo Revuelta
authors.forename: J R
authors.initials: JR
authors.lastname: Blanco Ramos
authors.forename: V
authors.initials: V
authors.lastname: Martínez de Artola
authors.forename: R
authors.initials: R
authors.lastname: Grandival García
authors.forename: V
authors.initials: V
authors.lastname: Ibarra Cucalón
authors.forename: R
authors.initials: R
authors.lastname: Dopereiro Gómez
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008193:Lyme Disease / Q000175:diagnosis* / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies