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CULEX SALTANENSIS DYAR, 1928: NATURAL VECTOR OF PLASMODIUM JUXTANUCLEARE IN RIO DE JANEIRO, BRAZIL
Plasmodium juxtanucleare
Vetor de malária aviária
Mosquitos ornitofílicos
Malária de frango
Plasmodium juxtanucleare
Avian malaria vector
Ornithophilic mosquitoes
Chicken malaria
Affilliation
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ, Brasil.
Abstract
Searching for the natural vector of Plasmodium juxtanucleare in an enzootic locality: Granjas Calábria (33% of the chickens infected), Jacarepaguá, in Rio de Janeiro, Brazil, 13 comparative captures of mosquitoes were carried out, simultaneously on man (out-doors) and on chiken (in a poultry-yard), between 6 and 9 p.m., from September to March 1989. Culex saltanensis was the most frequent species in captures on chicken, accounting for 41.7% of the mosquitoes collected on this bait, showing to be highly ornithophilic (90% captured on chicken versus 10% on man). Seven specimens of Cx. saltanensis were found naturally infected in granjas Calábria: five with mature pedunculate oocysts and two with sporozoites (on in the haemocoele and one in the salivary glands). These sporozoites porudced an infection by P. juxtanucleare in a chick, which had parasitemia on day 41 after inoculation. One Cx. coronator was found with mature pedunculate oocysts. Culex saltanensis was regarded as primary vector of P. juxtanucleare in Rio de Janeiro for being highly ornithophilic and in enough density to maintain the transmission, having been found with infective sporozoites in its salivary glands, and being susceptible to the parasite and able to transmit experimentally it by the bite.
Keywords in Portuguese
Culex saltanensisPlasmodium juxtanucleare
Vetor de malária aviária
Mosquitos ornitofílicos
Malária de frango
Keywords
Culex saltanensisPlasmodium juxtanucleare
Avian malaria vector
Ornithophilic mosquitoes
Chicken malaria
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