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American Journal of Epidemiology Vol. 107, No. 5: 444-449
Copyright © 1978 by The Johns Hopkins University School of Hygiene and Public Health

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EMERGENCE OF A NEW ARBOVIRUS DISEASE IN BRAZIL

I. ISOLATION AND CHARACTERIZATION OF THE ETIOLOGIC AGENT, ROCIO VIRUS

OSCAR DE SOUZA LOPES1,, TEREZINHA L. M. COIMBRA1, LIA DE ABREU SACCHETTA1 and CHARLES H. CALISHER2

1 Seçao de Virus Transmitidos por Artropodos, Instituto Adolfo Lutz Av. Dr. Arnaldo 355, Cx. Postal 7027, Sao Paulo, S. P., Brazil
2 Vector-Borne Diseases Division CDC, Fort Collins, CO

1 Send reprint requests to Dr. Lopes at this address.

In April, 1975, an epidemic of human encephalitis was detected In several counties in the State of Sao Paulo, Brazil; the epidemic continued into 1976. A virus was Isolated from central nervous system (CNS) tissues of a 39-year-old male who died on December 8, 1975; the virus was found to be a new flavlvlrus for which the name Rocio virus is proposed. Nine further isolations of Rocio virus were obtained from CNS tissues of 17 patients who died with clinical symptoms of encephalitis. Isolations of virus and serologic evidence of Rocio virus infection In a significant proportion of the encephalitis patients suggested that Rocio virus was the etiologic agent of the epidemic. Rocio virus was Isolated only from patients who died within 5 days of onset of Illness. The virus was Isolated from two sentinel mice exposed In the epidemic zone and from a rufous collared sparrow (Zonotrichia capensis) collected in the area.

arboviruses; birds; disease outbreaks; encephalitis; Rocio virus


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 J. Gen. Virol.Home page
D. B. A. Medeiros, M. R. T. Nunes, P. F. C. Vasconcelos, G.-J. J. Chang, and G. Kuno
Complete genome characterization of Rocio virus (Flavivirus: Flaviviridae), a Brazilian flavivirus isolated from a fatal case of encephalitis during an epidemic in Sao Paulo state
J. Gen. Virol., August 1, 2007; 88(8): 2237 - 2246.
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