Circulation of Eastern equine encephalitis, Western equine encephalitis, Ilhéus, Maguari and Tacaiuma viruses in equines of the Brazilian Pantanal, South America Circulação dos virus das encefalites equina do Leste e Oeste, Ilhéus, Maguari e Tacaiuma em equinos da região do Pantanal brasileiro, América do Sul

Neutralizing antibodies to EEE (6.7%), WEE (1.2%), ILH (26.6%), MAG (28.2%) and TCM (15.7%) viruses were found in sera of 432 equines of the Brazilian Pantanal, area where undiagnosed horse deaths are frequently observed. A 4-fold rise in CF titer to EEE virus was detected in acute and convalescent...

Full description

Bibliographic Details
Published in:Revista do Instituto de Medicina Tropical de São Paulo
Main Authors: Lygia Busch Iversson, Roberto Aguilar M.S. Silva, Amélia P.A. Travassos da Rosa, Vera Lúcia R.S. Barros
Format: Article in Journal/Newspaper
Language:English
Published: Universidade de São Paulo (USP) 1993
Subjects:
Arboviruses
Pantanal region
Equine encephalitis
Serological survey in equines
Arctic medicine. Tropical medicine
RC955-962
Infectious and parasitic diseases
RC109-216
Aguda
Arctic
Online Access:https://doi.org/10.1590/S0036-46651993000400009
https://doaj.org/article/6eaa5ce87811458ebb09a889095d10ef
Description
Summary:Neutralizing antibodies to EEE (6.7%), WEE (1.2%), ILH (26.6%), MAG (28.2%) and TCM (15.7%) viruses were found in sera of 432 equines of the Brazilian Pantanal, area where undiagnosed horse deaths are frequently observed. A 4-fold rise in CF titer to EEE virus was detected in acute and convalescent sera of an encephalitis horse sacrified in 1992. Antibodies to EEE, ILH, MAG and TCM viruses were detected in horses less than 2 years old indicating recent circulation of these viruses in the Pantanal. The evidence of recent equine encephalitis associated with rising CF titer to EEE warrants a more intensive study with attempts to isolate virus from horses with clinical manifestations of encephalitis. Em um inquérito sorológico realizado em 432 equinos da região do Pantanal, território brasileiro, foram detectados anticorpos neutralizantes para os vírus EEE (6,7%), WEE (1,2%), ILH (26,6%), MAG (28,2%) e TCM (15,7%). Detectou-se também em um cavalo com um quadro clínico de encefalite um aumento de 4 vezes no título de anticorpos fixadores de complemento para EEE em soros coletados nas fases aguda e convalescente da doença. Cavalos com menos de 2 anos de idade apresentaram anticorpos neutralizantes para EEE, ILH, MAG e TCM, indicando circulação recente desses vírus no Pantanal. Os achados justificam intensificar esses estudos na região com tentativas de isolamento de vírus de animais apresentando manifestações clínicas de encefalite.

Similar Items