With the objective of isolating and identifying enteroviral serotypes, which are the most frequent etiologic agents of aseptic meningitis syndrome, cerebrospinal fluid samples were studied from patients referred to the health unit in the City of Belém (State of Pará, Brazil), from March 2002 to March 2003. The samples were inoculated in RD and HEp-2 cells line, and the positive were identified by neutralization test or indirect immunofluorescence. Out of 249 samples, 33 (13.2%) were positive 57.6% (n = 19) in patients under 11 years of age (p < 0.03) and predominantly (72.7%) in males (p < 0.008). The serotypes isolated were: Echovirus 30 (n = 31), Coxsackievirus B5 (n = 1) and Echovirus 30 and 4. In conclusion, this type of study also serves to determine the national picture, which is still little defined, regarding the most prevalent viral agents in AMS cases.
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