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Memórias do Instituto Oswaldo Cruz

Print version ISSN 0074-0276On-line version ISSN 1678-8060

Mem. Inst. Oswaldo Cruz vol.38 no.1 Rio de Janeiro  1943

http://dx.doi.org/10.1590/S0074-02761943000100009 

Anticorpos neutralizantes para a amostra leste do virus de encefalomielite equina em equídeos no Brasil

Edwin H. Lennette

John P. Fox

RESUMO

Resume-se a literatura sobre encefalomielite equina no Brasil. Dos vários agentes infecciosos isolados de epizootias dessa doença somente um foi identificado com certeza e era o virus da raiva (Cunha). Exames feitos neste Laboratório com soros de equídeos que haviam passado por uma epizootia de encefalomielite no município de Peçanha, Minas Gerais, durante o fim de 1940 e princípio de 1941 revelaram que a maioria possuia anticorpos neutralizantes para o virus de encefalomielite equina de leste. Estes achados indicam que esse virus ocorre tambem no Brasil não sendo, portanto, restrito à América do Norte.

ABSTRACT

The literature on equine encephalomyelitis in Brazil is very briefly sumarized. It is shown that of the several infectious agents isolated from epizootics of this disease, only one has been identified with certainty and has been found to be rabies virus (Cunha). During late 1940 and early 1941 an epizootic of encephalomyelitis occurred in the Municipio (County) of Peçanha, which is located in the east central part of the State of Minas Gerais. Sera were collected from eighteen horses and mules which had passed through the epizootic, and tested for neutralizing antibodies to the St. Louis encephalitis virus and to the eastern and western strains of equine encephlomyelitis virus. None of the sera contained demonstrable antibodies to the St. Louis or western equine encephalomyelitis viruses; fourteen of the eighteen sera, however, possessed antibodies to the eastern strain. Only one of the twenty control sera, obtained from adjacent areas, was found to contain antibodies for the eastern strain, and this one also came from the Municipio of Peçanha. It is concluded that the eastern strain of equine encephlomyelitis virus occurs also in Brazil and is not confined to North America.

 

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