Estimation du taux de survie, de la densité relative et du taux d'infection d'une population d'Haemagogus janthinomys Dyar (Diptera, Culicidae) ayant fourni des souches de fièvre jaune en Amazonie Brésilienne.

Translated title of the contribution: Estimation of the survival rate, the relative density and the infection rate of a population of Haemagogus janthinomys Dyar (Diptera, Culicidae) from which strains of yellow fever were isolated in Brazilian Amazon

N. Dégallier, A. P. Travassos da Rosa, P. F. Vasconcelos, S. C. Guerreiro, J. F. Travassos da Rosa, J. P. Hervé

Research output: Contribution to journalArticle

8 Scopus citations


The conditions of maintenance of YF virus in brazilian Amazonia are not yet elucidated. Generally, the presence of the virus is attested by human cases of sylvatic origin. During a survey done at the exact place where a man have probably been contaminated, it was possible for the first time in South America, to estimate the mean parity rate of a population of the potential vector Haemagogus janthinomys, from which the YF virus was actually isolated. The survival rate (Ts = 0.96), the biting rate (0.60 mosquitoes/man x hour), and the infection rate (1.71%) were also determinated for the same mosquitoes and have values compatible with the probable conditions of the human contamination. However, more data are needed, in particular in relation with other possible human contaminations and/or circulation of the YF virus in the monkey population (extension and duration of the epizootic episode), in order to know what maintenance cycle is prevalent in this region: a low level transmission, with the mosquito being a "vector-reservoir", or a "constantly moving epizootic wave".

Original languageFrench
Pages (from-to)386-397
Number of pages12
JournalBulletin de la Société de pathologie exotique (1990)
Issue number4
StatePublished - 1991


ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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