Circulation of Eastern equine encephalitis, Western equine encephalitis, Ilhéus, Maguari and Tacaiuma viruses in equines of the Brazilian Pantanal, South America

Revista do Instituto de Medicina Tropical de São Paulo

Lygia Busch Iversson²  Roberto Aguilar M.s. Silva¹  Amélia P.a. Travassos Da Rosa¹  Vera Lúcia R.s. Barros¹ 

[1] ,University of São Paulo Public Health School Department of EpidemiologySão Paulo S. P. ,Brazil

关键词: Arboviruses;    Pantanal region;    Equine encephalitis;    Serological survey in equines;   

DOI  :  10.1590/S0036-46651993000400009

来源: SciELO

【 摘 要 】

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.

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