Keywords
jungle Yellow Fever
human cases
eco-epidemiological survey
How to Cite
Abstract
The authors relate the occurrence and the results of the investigations of human cases of jungle yellow fever (YF) in São Paulo State. In 2000, 7 suspect cases of YF were confirmed; 5 of them were imported from other States and 2 probably autochthonous, from areas located at the banks of the Grande river, at Northwest of the São Paulo State. Four of them evolved into death. Serological survey was done among 630 inhabitants of 13 riverside Counties and entomological research was performed in the areas in which there was suspicion of autochthonous transmission. The confirmation of these cases was done by serological tests, virus isolation and molecular techniques. The 7 samples resulted positive for YF in at least one of the tests. All the 7 samples were reacted to YF in MAC-ELISA test. The virus was isolated in serum samples of 4 patients and no virus isolation was obtained from mosquitoes. The serological survey showed 5,23% of prevalence of YF antibodies. The detection of two cases of jungle YF in São Paulo State confirm the tendency that the transmission has migrated to the South of Brazil. The presence of antibodies for YF among population in areas where earlier transmission...
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