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MOSQUITO FREQUENCY AND FEEDING HABITS IN AN ENZOOTIC CANINE DIROFILARIASIS AREA IN NITERÓI, STATE OF RIO DE JANEIRO, BRAZIL
Verme cardíaco
Hábitos alimentares de mosquitos
Frequência de mosquitos
Canine
Felíno
Author
Affilliation
Universidade Federal Fluminense. Centro de Ciências Médicas. Faculdade de Veterinária. Niterói, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Coleção Entomológica. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Coleção Entomológica. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Coleção Entomológica. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Coleção Entomológica. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro, RJ, Brasil.
Abstract
Heartworm, a chronic fatal mosquito-borne canine disease, is frequently diagnosed in dogs from the
State of Rio de Janeiro, where its prevalence is 29.7% in the city of Niterói. Nevertheless it is rarely
detected in cats (0.8%) from the same state. Dogs are the primary source of infection to mosquitoes,
because cats either do not demonstrate microfilaremia or it is too low and transient for transmission. A
mosquito survey was conducted in Itacoatiara, Niterói, from March 1995 to February 1996, using canine, feline and human baits. A total of 21 mosquito species (3,888 females) was collected and biting
frequency was highest at dusk. The four species collected most frequently (88.9%) were: Aedes
taeniorhynchus (30% of the total catch; with the peak in May/June); Culex quinquefasciatus (22.5%;
August/October); Aedes scapularis (19.4%; August, October/November and January) and Culex declarator (17%; November/January). Human baits were attractive to these species and dogs were significantly more attractive to them than cats. Ae. taeniorhynchus, Cx. quinquefasciatus, Ae. scapularis, Cx.
declarator and Cx. nigripalpus are the most likely mosquito species to transmit Dirofilaria immitis parasites to dogs and may transmit the parasite to humans. It is also suggested that the vector to cats belongs
to the genus Culex.
Keywords in Portuguese
Dirofilaria immitisVerme cardíaco
Hábitos alimentares de mosquitos
Frequência de mosquitos
Canine
Felíno
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