Anophelines species and the receptivity and vulnerability to malaria transmission in the Pantanal wetlands, Central Brazil
BACKGROUND Studies on malaria vectors in the Pantanal biome, Central Brazil, were conducted more than half a century ago. OBJECTIVES To update anopheline records and assess receptivity and vulnerability to malaria transmission. METHODS Five-day anopheline collections were conducted bimonthly in Sa...
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Fundação Oswaldo Cruz (FIOCRUZ)
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| Series: | Memorias do Instituto Oswaldo Cruz |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762018000200087&lng=en&tlng=en |
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| author | Mariana Marinho-e-Silva Maria Anice Mureb Sallum Maria Goreti Rosa-Freitas Ricardo Lourenço-de-Oliveira Teresa Fernandes Silva-do-Nascimento |
| author_facet | Mariana Marinho-e-Silva Maria Anice Mureb Sallum Maria Goreti Rosa-Freitas Ricardo Lourenço-de-Oliveira Teresa Fernandes Silva-do-Nascimento |
| author_sort | Mariana Marinho-e-Silva |
| collection | DOAJ |
| description | BACKGROUND Studies on malaria vectors in the Pantanal biome, Central Brazil, were conducted more than half a century ago. OBJECTIVES To update anopheline records and assess receptivity and vulnerability to malaria transmission. METHODS Five-day anopheline collections were conducted bimonthly in Salobra, Mato Grosso do Sul state, for one year. Indoors, mosquitoes were collected from their resting places, while in open fields, they were captured using protected human-baited and horse-baited traps near the house and at the Miranda River margin, respectively. Hourly biting activity outdoors was also assessed. Secondary data were collected on the arrival of tourists, economic projects, and malaria cases. FINDINGS A total of 24,894 anophelines belonging to 13 species were caught. The main Brazilian malaria vector Anopheles darlingi was the predominant species, followed by An. triannulatus s.l. Hourly variation in anopheline biting showed three main peaks occurring at sunset, around midnight, and at sunrise, the first and last being the most prominent. The highest density of all species was recorded near the river margin and during the transition period between the rainy and early dry seasons. This coincides with the time of main influx of outsider workers and tourists, whose activities mostly occur in the open fields and frequently start before sunrise and last until sunset. Some of these individuals originate from neighbouring malaria-endemic countries and states, and are likely responsible for the recorded imported and introduced malaria cases. MAIN CONCLUSION Pantanal is a malaria-prone area in Brazil. Surveillance and anopheline control measures must be applied to avoid malaria re-emergence in the region. |
| first_indexed | 2024-03-12T08:47:58Z |
| format | Article |
| id | doaj.art-960a41f781e6431eb5999be21b1d4b74 |
| institution | Directory Open Access Journal |
| issn | 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T08:47:58Z |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-960a41f781e6431eb5999be21b1d4b742023-09-02T16:25:10ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz1678-80601132879510.1590/0074-02760170175S0074-02762018000200087Anophelines species and the receptivity and vulnerability to malaria transmission in the Pantanal wetlands, Central BrazilMariana Marinho-e-SilvaMaria Anice Mureb SallumMaria Goreti Rosa-FreitasRicardo Lourenço-de-OliveiraTeresa Fernandes Silva-do-NascimentoBACKGROUND Studies on malaria vectors in the Pantanal biome, Central Brazil, were conducted more than half a century ago. OBJECTIVES To update anopheline records and assess receptivity and vulnerability to malaria transmission. METHODS Five-day anopheline collections were conducted bimonthly in Salobra, Mato Grosso do Sul state, for one year. Indoors, mosquitoes were collected from their resting places, while in open fields, they were captured using protected human-baited and horse-baited traps near the house and at the Miranda River margin, respectively. Hourly biting activity outdoors was also assessed. Secondary data were collected on the arrival of tourists, economic projects, and malaria cases. FINDINGS A total of 24,894 anophelines belonging to 13 species were caught. The main Brazilian malaria vector Anopheles darlingi was the predominant species, followed by An. triannulatus s.l. Hourly variation in anopheline biting showed three main peaks occurring at sunset, around midnight, and at sunrise, the first and last being the most prominent. The highest density of all species was recorded near the river margin and during the transition period between the rainy and early dry seasons. This coincides with the time of main influx of outsider workers and tourists, whose activities mostly occur in the open fields and frequently start before sunrise and last until sunset. Some of these individuals originate from neighbouring malaria-endemic countries and states, and are likely responsible for the recorded imported and introduced malaria cases. MAIN CONCLUSION Pantanal is a malaria-prone area in Brazil. Surveillance and anopheline control measures must be applied to avoid malaria re-emergence in the region.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762018000200087&lng=en&tlng=enmalariavectorswetlandsPantanal |
| spellingShingle | Mariana Marinho-e-Silva Maria Anice Mureb Sallum Maria Goreti Rosa-Freitas Ricardo Lourenço-de-Oliveira Teresa Fernandes Silva-do-Nascimento Anophelines species and the receptivity and vulnerability to malaria transmission in the Pantanal wetlands, Central Brazil Memorias do Instituto Oswaldo Cruz malaria vectors wetlands Pantanal |
| title | Anophelines species and the receptivity and vulnerability to malaria transmission in the Pantanal wetlands, Central Brazil |
| title_full | Anophelines species and the receptivity and vulnerability to malaria transmission in the Pantanal wetlands, Central Brazil |
| title_fullStr | Anophelines species and the receptivity and vulnerability to malaria transmission in the Pantanal wetlands, Central Brazil |
| title_full_unstemmed | Anophelines species and the receptivity and vulnerability to malaria transmission in the Pantanal wetlands, Central Brazil |
| title_short | Anophelines species and the receptivity and vulnerability to malaria transmission in the Pantanal wetlands, Central Brazil |
| title_sort | anophelines species and the receptivity and vulnerability to malaria transmission in the pantanal wetlands central brazil |
| topic | malaria vectors wetlands Pantanal |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762018000200087&lng=en&tlng=en |
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