AJTMH Transactions of the Royal Society of Tropical Medicine and Hygiene
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Am. J. Trop. Med. Hyg., 30(1), 1981, pp. 145-148
Copyright © 1981 by The American Society of Tropical Medicine and Hygiene

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Isolation of St. Louis Encephalitis Virus from a Patient in Belém, Brazil*

Francisco P. Pinheiro, James W. LeDuc{dagger}, Amelia P. A. Travassos da Rosa AND Octavio F. Leite
Instituto Evandro Chagas, FSESP, Belém, Pará, Brazil, United States Army Medical Research Unit, Belém, Brazil, APO Miami 34030, and Hospital Servidores do Estado, Belém, Pará, Brazil

St. Louis encephalitis (SLE) virus was isolated from a 21-year-old female hospitalized on 4 October 1978 in Belém, Brazil. Symptomatology on admission included fever, chills, severe headache, abdominal pain, myalgia, arthralgia and jaundice. SLE virus was isolated from her blood drawn on the 8th day of illness and subsequent seroconversion was documented. Serological tests showed the isolate to be closely related to the Belém prototype of SLE virus but distinct from other flaviviruses tested. The patient was discharged without sequelae after 16 days of hospitalization. Epidemiological investigations where the patient worked and lived revealed no evidence of extensive transmission of SLE virus.

Accepted for publication May 31, 1980.


* This study was conducted under the auspices of the Ministerio da Saude Publica do Brasil. The research was conducted at the Instituto Evandro Chagas, Belém, Pará, Brazil under PAHO Project BRA 4311 and supported by Programa de Polos Agropecuarios e Agrominerais da Amazônia (Polamazônia), SUDAM, MINTER and Research Contract number DAMD 17-74-G-9378 from the U.S. Army Medical Research and Development Command, Office of the Surgeon General, Washington, D.C. The opinions contained herein are those of the authors and should not be construed as official or reflecting the views of the Department of the Army.

Address reprint requests to: Academic Operations, Walter Reed Army Institute of Research, Walter Reed Army Medical Center, Washington, D.C. 20012.


{dagger} Present address: Gorgas Memorial Laboratory, P.O. Box 935, APO Miami 34002.






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Copyright © 1981 by the American Society of Tropical Medicine and Hygiene.