Ecological relationships of Haemagogus spegazzinii (Diptera: Culicidae) in a semiarid area of Brazil

In t reduction: Haemagogus are mosquitoes with diurnal habits that live preferentially in forest areas. In Brazil, they are considered the primary vectors of wild yellow fever. Methods: The ecological relationships between Haemagogus spegazzinii, the environment, and some of its activities in the se...

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Veröffentlicht in:Revista da Sociedade Brasileira de Medicina Tropical 2020-01, Vol.53, p.e20200502-e20200502, Article 20200502
Hauptverfasser: Silva-Inacio, Cassio Lazaro, Pereira de Paiva, Anne Aline, Galvao de Araujo, Joselio Maria, Freire de Melo Ximenes, Maria de Fatima
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Pereira de Paiva, Anne Aline
Galvao de Araujo, Joselio Maria
Freire de Melo Ximenes, Maria de Fatima
description In t reduction: Haemagogus are mosquitoes with diurnal habits that live preferentially in forest areas. In Brazil, they are considered the primary vectors of wild yellow fever. Methods: The ecological relationships between Haemagogus spegazzinii, the environment, and some of its activities in the semiarid region of Rio Grande do Norte were analyzed by collecting eggs with ovitraps, actively searching in tree holes, capturing adults in Shannon traps, and conducting an investigation for viral infections. Results: A total of 2420 eggs, 271 immature specimens (larvae and pupae), and 206 adults were collected. Egg collection depended on rainfall and relative humidity, with oviposition occurring between January and May. Larvae were found in five plant species, including Tabebuia aurea (craibeira), with 160 larvae collected. We observed shared breeding sites between Hg. spegazzinii and the following species: Aedes albopictus, Aedes terrens, Culex spp., and Toxorhvnchites theobaldi. Adults exhibited greater activity between 5 pm and 6 pm, when 191 (92.7%) specimens were captured, while only 1 (0.5%) was collected between 7 pm and 8 pm. The relationship between Hg. spegazzinii and rainfall was significant, with positive correlations with accumulated rainfall 5, 10, 15, 20, and 30 days before mosquito collection. We found that the species was infected with the DENV-2 virus. Conclusions: This work contributes new information on the bioecology of Hg. spegazzinii, with data on the main reproduction periods, oviposition, breeding sites, activity times, and the relationship between the species and meteorological variables in the Caatinga of northeastern Brazil.
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In Brazil, they are considered the primary vectors of wild yellow fever. Methods: The ecological relationships between Haemagogus spegazzinii, the environment, and some of its activities in the semiarid region of Rio Grande do Norte were analyzed by collecting eggs with ovitraps, actively searching in tree holes, capturing adults in Shannon traps, and conducting an investigation for viral infections. Results: A total of 2420 eggs, 271 immature specimens (larvae and pupae), and 206 adults were collected. Egg collection depended on rainfall and relative humidity, with oviposition occurring between January and May. Larvae were found in five plant species, including Tabebuia aurea (craibeira), with 160 larvae collected. We observed shared breeding sites between Hg. spegazzinii and the following species: Aedes albopictus, Aedes terrens, Culex spp., and Toxorhvnchites theobaldi. Adults exhibited greater activity between 5 pm and 6 pm, when 191 (92.7%) specimens were captured, while only 1 (0.5%) was collected between 7 pm and 8 pm. The relationship between Hg. spegazzinii and rainfall was significant, with positive correlations with accumulated rainfall 5, 10, 15, 20, and 30 days before mosquito collection. We found that the species was infected with the DENV-2 virus. Conclusions: This work contributes new information on the bioecology of Hg. spegazzinii, with data on the main reproduction periods, oviposition, breeding sites, activity times, and the relationship between the species and meteorological variables in the Caatinga of northeastern Brazil.</abstract><cop>BRASILIA</cop><pub>Soc Brasileira Medicina Tropical</pub><pmid>33263687</pmid><doi>10.1590/0037-8682-0502-2020</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0001-7173-5416</orcidid><oa>free_for_read</oa></addata></record>
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subjects Aedes
Animals
Biological cycle
Brazil
Breeding sites
Culicidae
Ecological relationships
Female
Forests
Haemagogus
Life Sciences & Biomedicine
Major
Mosquito Vectors
Oviposition
Parasitology
Science & Technology
TROPICAL MEDICINE
Yellow Fever
title Ecological relationships of Haemagogus spegazzinii (Diptera: Culicidae) in a semiarid area of Brazil
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