Dinâmica de transmissão natural de Mansonella ozzardi (Manson, 1897) (Nematoda: Onchocercidae) na comunidade de Pedras Negras, município de São Francisco do Guaporé, Estado de Rondônia, Brasil
Mansonelliasis is a tropical filarial disease caused by M. ozzardi transmitted by black flies and midges. Only the black flies are vectors for this filariasis in Brazil, where the disease is more expressive in Amazonian riverside communities. This gives to Rondônia State a real risk of occurrence...
| Autor principal: | Velasques, Suzane Neves |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12523 http://lattes.cnpq.br/4030004569821785 |
| Resumo: |
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Mansonelliasis is a tropical filarial disease caused by M. ozzardi transmitted by black
flies and midges. Only the black flies are vectors for this filariasis in Brazil, where the
disease is more expressive in Amazonian riverside communities. This gives to
Rondônia State a real risk of occurrence of this filariasis. This study investigated the
natural occurrence of M. ozzardi in anthropophilic blackflies species collected and the
epidemiological risk factors for mansonelliasis at the Remaining Community of
Quilombo Pedras Negras, in the Guapore Valley, Rondônia State. Collections of four
days per month between November 2011 and October 2012 were held from 6:00 to
18:30, with 30 minutes interval during which we analyzed the parity of females
captured. A two species were collected biting: Cerqueirellum pydanieli and
Coscaroniellum quadrifidum. There was a higher abundance of parous females. The M.
ozzardi larvae were found in all stages of development. A larger sample of black flies
occurred during the rainy season, which were restricted collections of C. quadrifidum.
The biting activity was higher in the afternoon for both species of black flies. The
climatic parameters temperature and humidity were considered influential in the C.
pydanieli activity. There were no significant correlations with the other variables, nor
between these and C. quadrifidum. The parasitic infection rates were considered low
and the potential annual transmission was considered high compared to other studies.
Until now, no case records of mansonelliasis in Rondônia, however, both C. pydanieli
as C. quadrifidum were positive for infection by M. ozzardi with specimens containing
metacyclic larvae, indicating that both species are probable carries of this filaria in the
Guapore Valley, Rondônia State, Brazil. |