High malaria transmission in a forested malaria focus in French Guiana: How can exophagic Anopheles darlingi thwart vector control and prevention measures?
Mem Inst Oswaldo Cruz
; 111(9): 561-9, 2016 Sep.
Article
en En
| MEDLINE
| ID: mdl-27653361
ABSTRACT
In French Guiana, malaria vector control and prevention relies on indoor residual spraying and distribution of long lasting insecticidal nets. These measures are based on solid epidemiological evidence but reveal a poor understanding of the vector. The current study investigated the behaviour of both vectors and humans in relation to the ongoing prevention strategies. In 2012 and 2013, Anopheles mosquitoes were sampled outdoors at different seasons and in various time slots. The collected mosquitoes were identified and screened for Plasmodium infection. Data on human behaviour and malaria episodes were obtained from an interview. A total of 3,135 Anopheles mosquitoes were collected, of which Anopheles darlingi was the predominant species (96.2%). For the December 2012-February 2013 period, the Plasmodium vivax infection rate for An. darlingi was 7.8%, and the entomological inoculation rate was 35.7 infective bites per person per three-month span. In spite of high bednet usage (95.7%) in 2012 and 2013, 52.2% and 37.0% of the participants, respectively, had at least one malaria episode. An. darlingi displayed heterogeneous biting behaviour that peaked between 2030 and 2230; however, 27.6% of the inhabitants were not yet protected by bednets by 2130. The use of additional individual and collective protective measures is required to limit exposure to infective mosquito bites and reduce vector densities.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Mordeduras y Picaduras de Insectos
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Insectos Vectores
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Anopheles
Tipo de estudio:
Qualitative_research
Límite:
Animals
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Female
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Humans
País como asunto:
America do sul
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Caribe ingles
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Guyana
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Guyana francesa
Idioma:
En
Año:
2016
Tipo del documento:
Article