Description of malaria vectors (Diptera: Culicidae) in two agricultural settlements in the Western Brazilian Amazon
| Autor: | Jansen Fernandes Medeiros, Alessandra da Silva Bastos, Najara Akira Costa dos Santos, Felipe Neves Magi, Maisa da Silva Araujo, Raphael Brum Castro, Dhelio Batista Pereira, Moreno S. Rodrigues, Alice Oliveira Andrade, Isabelle Sousa de Araujo |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Plasmodium
RC955-962 Disease transmission Zoology Mosquito Vectors law.invention law Arctic medicine. Tropical medicine Human settlement parasitic diseases Anopheles medicine Animals Humans Colonization biology Amazon rainforest biology.organism_classification medicine.disease Rural communities Malaria Geography Transmission (mechanics) Original Article Species richness Rural area Brazil |
| Zdroj: | Revista do Instituto de Medicina Tropical de São Paulo Revista do Instituto de Medicina Tropical de São Paulo, Volume: 63, Article number: e60, Published: 30 JUL 2021 Revista do Instituto de Medicina Tropical de São Paulo; Vol. 63 (2021); e60 Revista do Instituto de Medicina Tropical de São Paulo; v. 63 (2021); e60 Instituto de Medicina Tropical (IMT) instacron:IMT Revista do Instituto de Medicina Tropical de São Paulo, Vol 63 (2021) |
| ISSN: | 1678-9946 0036-4665 |
| Popis: | The majority of malaria cases in South America occur in rural areas of the Amazon region. Although these areas have a significant impact on malaria cases, few entomological studies have been carried out there. This study aimed to describe entomological parameters in settlements in Rondonia State, Brazil. Collections of anopheles were carried out using the Protected Human Attraction Technique (PHAT). The risk and the potential for malaria transmission were assessed using the human biting rate (HBR), the sporozoite rate (SR) and the entomological inoculation rate (EIR). The results confirmed that Nyssorhynchus darlingi is the predominant species in the two studied locations. Although settlement in the two study sites has occurred at different times, the species richness found was low, showing that environmental changes caused by anthropological actions have probably favor the adaptation of Ny. darlingi species. From the total of 615 anopheline mosquitoes assessed, seven (1.1%) were positive for Plasmodium sp. infections. The EIR revealed that Ny. darlingi contributes to malaria transmission in both locations, as it was responsible for 0.05 infectious bites in humans at night in the old settlement and 0.02 in the recent occupation. In the two study sites, the biting occurred more frequently at dusk. Nyssorhynchus darlingi was prevalent in areas of recent colonization but, even when present in a low density, this species could maintain the transmission of malaria in the older settlement. The entomological information obtained in this study is important and may aid the selection of vector control actions in these locations. |
| Databáze: | OpenAIRE |
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