Epidemiologia das encefalities por arbovírus na Amazônia brasileira.

Translated title of the contribution: Epidemiology of encephalitis caused by arbovirus in the Brazilian Amazonia

P. F. Vasconcelos, J. F. Da Rosa, A. P. Da Rosa, N. Dégallier, F. P. Pinheiro, G. C. Sá Filho

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

An overview of ecological, epidemiological and clinical findings of potential arthropod-borne encephalitis viruses circulating in the Amazon Region of Brazil are discussed. These viruses are the Eastern Equine Encephalitis (EEE), Western Equine Encephalitis (WEE), St. Louis Encephalitis (SLE), Mucambo (MUC) and Pixuna (PIX). These last two are subtypes (III and IV) of Venezuelan Equine Encephalitis virus. The areas of study were the highways and projects of development, as well as places where outbreaks of human diseases caused by arboviruses had been detected. These viruses are widespread in all Amazonia, and at least four of them, EEE, WEE, SLE and MUC are pathogenic to man. EEE and WEE infections were detected by serology, while SLE and MUC by either serology and virus isolation. The PIX virus has the lowest prevalence and, it was isolated in only a few cases, one being from a laboratory infection. Wild birds are the main hosts for all these viruses, except MUC, whose major hosts are rodents. The symptoms presented by infected people were generally a mild febrile illness. Although, jaundice was observed in two individuals from whom SLE was isolated. A comparison of the clinical symptoms presented by the patients in the Amazon Region and other areas of America, especially in the USA is made. In Brazilian Amazon region epidemics have not been detected although, at least, one EEE epizootic was recorded in Bragança, Para State, in 1960. At that time, of 500 horses that were examined 61% were positive to EEE by HI and of them 8.2% died. On the other hand, SLE has caused four epizootics in a forest near Belem. Wild birds and sentinel monkeys were infected, but no human cases were reported.

Original languagePortuguese
Pages (from-to)465-476
Number of pages12
JournalRevista do Instituto de Medicina Tropical de Sao Paulo
Volume33
Issue number6
StatePublished - Nov 1991
Externally publishedYes

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St. Louis Encephalitis
Arbovirus Encephalitis
Eastern Equine Encephalomyelitis
Western Equine Encephalomyelitis
Epidemiology
Viruses
Arboviruses
Serology
Birds
Eastern equine encephalitis virus
Encephalitis Viruses
Venezuelan Equine Encephalitis Viruses
Laboratory Infection
Jaundice
Horses
Haplorhini
Disease Outbreaks
Brazil
Rodentia
Fever

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

Cite this

Vasconcelos, P. F., Da Rosa, J. F., Da Rosa, A. P., Dégallier, N., Pinheiro, F. P., & Sá Filho, G. C. (1991). Epidemiologia das encefalities por arbovírus na Amazônia brasileira. Revista do Instituto de Medicina Tropical de Sao Paulo, 33(6), 465-476.

Epidemiologia das encefalities por arbovírus na Amazônia brasileira. / Vasconcelos, P. F.; Da Rosa, J. F.; Da Rosa, A. P.; Dégallier, N.; Pinheiro, F. P.; Sá Filho, G. C.

In: Revista do Instituto de Medicina Tropical de Sao Paulo, Vol. 33, No. 6, 11.1991, p. 465-476.

Research output: Contribution to journalArticle

Vasconcelos, PF, Da Rosa, JF, Da Rosa, AP, Dégallier, N, Pinheiro, FP & Sá Filho, GC 1991, 'Epidemiologia das encefalities por arbovírus na Amazônia brasileira.', Revista do Instituto de Medicina Tropical de Sao Paulo, vol. 33, no. 6, pp. 465-476.
Vasconcelos PF, Da Rosa JF, Da Rosa AP, Dégallier N, Pinheiro FP, Sá Filho GC. Epidemiologia das encefalities por arbovírus na Amazônia brasileira. Revista do Instituto de Medicina Tropical de Sao Paulo. 1991 Nov;33(6):465-476.
Vasconcelos, P. F. ; Da Rosa, J. F. ; Da Rosa, A. P. ; Dégallier, N. ; Pinheiro, F. P. ; Sá Filho, G. C. / Epidemiologia das encefalities por arbovírus na Amazônia brasileira. In: Revista do Instituto de Medicina Tropical de Sao Paulo. 1991 ; Vol. 33, No. 6. pp. 465-476.
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