Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria · 2023
Dirofilaria immitis is endemic in rural areas of the Brazilian Amazonas state capital, Manaus.
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Barbosa Ulysses Carvalho, Nava Alessandra Ferreira Dales, Ferreira Neto José Vicente, Dias Cindy Alves, Silva Viviane Costa da, Mesquita Hugo Guimarães de, Sampaio Raquel Telles de Moreira, Barros Wanilze Gonçalves, Farias Emanuelle de Sousa, Silva Tullio Romão Ribeiro da, Crainey James Lee, Tadei Wanderli Pedro, Koolen Hector Henrique Ferreira, Pessoa Felipe Arley Costa
Аннотация
The canine filarial parasite Dirofilaria immitis has not been reported in Brazil´s Amazonas state capital, Manaus, for over a century. Here, we report one imported and 27 autochthonous D. immitis infections from a microfilarial survey of 766 domestic dog blood samples collected between 2017 and 2021 in Manaus. An Overall prevalence estimate of 15.44% (23/149) was calculated from our two rural collection sites; a prevalence of 1.22% (4/328) was estimated at our periurban collection site, and an overall prevalence of 0.35% (1/289) was calculated from our two urban clinic collections. Our data suggest that in the urban areas of Manaus, where the parasites are very likely vectored by the same species of mosquito that historically vectored Wuchereria bancrofti (Culex quinquefasciatus), prevalence levels are very low and possibly maintained by an influx from rural areas where sylvatic reservoirs and/or more favorable vector transmission dynamics maintain high prevalences.