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

Authors

  • Lygia Busch Iversson University of São Paulo; Public Health School; Department of Epidemiology
  • Roberto Aguilar M.S. Silva EMBRAPA; Department of Agriculture
  • Amélia P.A. Travassos da Rosa Evandro Chagas Institute
  • Vera Lúcia R.S. Barros Evandro Chagas Institute

Keywords:

Arboviruses, Pantanal region, Equine encephalitis, Serological survey in equines

Abstract

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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Published

1993-08-01

Issue

Vol. 35 No. 4 (1993)

Section

Epidemiology

How to Cite

Iversson, L. B., Silva, R. A. M., Rosa, A. P. T. da, & Barros, V. L. R. (1993). 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, 35(4), 355-359. https://www.revistas.usp.br/rimtsp/article/view/29058