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High malaria transmission in a forested malaria focus in French Guiana: How can exophagic Anopheles darlingi thwart vector control and prevention measures?
Vezenegho, Samuel B; Adde, Antoine; Santi, Vincent Pommier de; Issaly, Jean; Carinci, Romuald; Gaborit, Pascal; Dusfour, Isabelle; Girod, Romain; Briolant, Sébastien.
  • Vezenegho, Samuel B; Institut Pasteur de la Guyane. Cayenne. FR
  • Adde, Antoine; Institut Pasteur de la Guyane. Cayenne. FR
  • Santi, Vincent Pommier de; Institut Pasteur de la Guyane. Cayenne. FR
  • Issaly, Jean; Institut Pasteur de la Guyane. Cayenne. FR
  • Carinci, Romuald; Institut Pasteur de la Guyane. Cayenne. FR
  • Gaborit, Pascal; Institut Pasteur de la Guyane. Cayenne. FR
  • Dusfour, Isabelle; Institut Pasteur de la Guyane. Cayenne. FR
  • Girod, Romain; Institut Pasteur de la Guyane. Cayenne. FR
  • Briolant, Sébastien; Institut Pasteur de la Guyane. Cayenne. FR
Mem. Inst. Oswaldo Cruz ; 111(9): 561-569, Sept. 2016. tab, graf
Article in English | LILACS | ID: lil-794724
Responsible library: BR1.1
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.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Insect Bites and Stings / Insect Vectors / Anopheles Limits: Animals / Female / Humans Country/Region as subject: South America / English Caribbean / Guyana / French Guiana Language: English Journal: Mem. Inst. Oswaldo Cruz Journal subject: Tropical Medicine / Parasitology Year: 2016 Type: Article / Project document Affiliation country: France Institution/Affiliation country: Institut Pasteur de la Guyane/FR

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Full text: Available Index: LILACS (Americas) Main subject: Insect Bites and Stings / Insect Vectors / Anopheles Limits: Animals / Female / Humans Country/Region as subject: South America / English Caribbean / Guyana / French Guiana Language: English Journal: Mem. Inst. Oswaldo Cruz Journal subject: Tropical Medicine / Parasitology Year: 2016 Type: Article / Project document Affiliation country: France Institution/Affiliation country: Institut Pasteur de la Guyane/FR