Vector Capacity of Members of Triatoma brasiliensis Species Complex: The Need to Extend Chagas Disease Surveillance to Triatoma melanica
We conducted a lab-based comparative study on vector capacity features of two species of triatomines: Triatoma brasiliensis and T. melanica. Both are members of the T. brasiliensis species complex. The former is the most important Chagas disease vector in the northeastern region of Brazil. To date,...
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Veröffentlicht in: | Journal of vector ecology 2016-06, Vol.41 (1), p.48-54 |
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description | We conducted a lab-based comparative study on vector capacity features of two species of triatomines: Triatoma brasiliensis and T. melanica. Both are members of the T. brasiliensis species complex. The former is the most important Chagas disease vector in the northeastern region of Brazil. To date, no transmission via T. melanica has been recorded. Immature insects exhibited distinct intermoult periods without a direct relationship to a given species. Females of T. brasiliensis consumed an average of 1.9 times more meals (mean = 12.92 vs 6.63) and survived for a shorter period (mean =330.8 days) than T. melanica (mean = 365.2 days), probably due to the cost of reproduction (all significant at P39%) of insects defecated rapidly ( |
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Lynnette ; Orsolon, Guilherme ; Gonçalves, Teresa Cristina Monte ; Lilioso, Mauricio ; Costa, Jane ; Almeida, Carlos Eduardo</creator><creatorcontrib>Folly-Ramos, Elaine ; Dornak, L. Lynnette ; Orsolon, Guilherme ; Gonçalves, Teresa Cristina Monte ; Lilioso, Mauricio ; Costa, Jane ; Almeida, Carlos Eduardo</creatorcontrib><description>We conducted a lab-based comparative study on vector capacity features of two species of triatomines: Triatoma brasiliensis and T. melanica. Both are members of the T. brasiliensis species complex. The former is the most important Chagas disease vector in the northeastern region of Brazil. To date, no transmission via T. melanica has been recorded. Immature insects exhibited distinct intermoult periods without a direct relationship to a given species. Females of T. brasiliensis consumed an average of 1.9 times more meals (mean = 12.92 vs 6.63) and survived for a shorter period (mean =330.8 days) than T. melanica (mean = 365.2 days), probably due to the cost of reproduction (all significant at P<0.05). These data support the idea that T. brasiliensis is more adapted to lab conditions and is more able to infest domiciles than T. melanica. We also found significant distinctions in other features between these species, such as the elapsed time without eating before molting, which was higher for the second, third, and fifth nymph stages of T. melanica. Regarding features analyzed related to vector capacity, insects of all life stages of both species were considered competent to transmit Trypanosoma cruzi because they needed many feedings (mean =1.5–3.82) to moult and because a high proportion (>39%) of insects defecated rapidly (<30 s) after feeding. Overall, results highlight the need to extend vector surveillance to T. melanica.</description><identifier>ISSN: 1081-1710</identifier><identifier>EISSN: 1948-7134</identifier><identifier>DOI: 10.1111/jvec.12193</identifier><identifier>PMID: 27232124</identifier><language>eng</language><publisher>United States: Society for Vector Ecology</publisher><subject>Animals ; behavior ; Brazil ; Chagas Disease ; comparative bionomics ; eco-epidemiology ; Ecosystem ; Feeding Behavior ; Female ; Insect Vectors - classification ; Insect Vectors - parasitology ; ORIGINAL ARTICLES ; Triatoma - classification ; Triatoma - parasitology ; Triatominae ; Trypanosoma cruzi - isolation & purification ; Vector potential</subject><ispartof>Journal of vector ecology, 2016-06, Vol.41 (1), p.48-54</ispartof><rights>2016 The Society for Vector Ecology</rights><rights>2016 The Society for Vector Ecology.</rights><rights>Copyright Society for Vector Ecology Jun 2016</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-b4263-5f419ee824b74974f11dcc529590aba8af0dc6e0e86e011ce682fa3fd960de1b3</citedby><cites>FETCH-LOGICAL-b4263-5f419ee824b74974f11dcc529590aba8af0dc6e0e86e011ce682fa3fd960de1b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27232124$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Folly-Ramos, Elaine</creatorcontrib><creatorcontrib>Dornak, L. Lynnette</creatorcontrib><creatorcontrib>Orsolon, Guilherme</creatorcontrib><creatorcontrib>Gonçalves, Teresa Cristina Monte</creatorcontrib><creatorcontrib>Lilioso, Mauricio</creatorcontrib><creatorcontrib>Costa, Jane</creatorcontrib><creatorcontrib>Almeida, Carlos Eduardo</creatorcontrib><title>Vector Capacity of Members of Triatoma brasiliensis Species Complex: The Need to Extend Chagas Disease Surveillance to Triatoma melanica</title><title>Journal of vector ecology</title><addtitle>J Vector Ecol</addtitle><description>We conducted a lab-based comparative study on vector capacity features of two species of triatomines: Triatoma brasiliensis and T. melanica. Both are members of the T. brasiliensis species complex. The former is the most important Chagas disease vector in the northeastern region of Brazil. To date, no transmission via T. melanica has been recorded. Immature insects exhibited distinct intermoult periods without a direct relationship to a given species. Females of T. brasiliensis consumed an average of 1.9 times more meals (mean = 12.92 vs 6.63) and survived for a shorter period (mean =330.8 days) than T. melanica (mean = 365.2 days), probably due to the cost of reproduction (all significant at P<0.05). These data support the idea that T. brasiliensis is more adapted to lab conditions and is more able to infest domiciles than T. melanica. We also found significant distinctions in other features between these species, such as the elapsed time without eating before molting, which was higher for the second, third, and fifth nymph stages of T. melanica. Regarding features analyzed related to vector capacity, insects of all life stages of both species were considered competent to transmit Trypanosoma cruzi because they needed many feedings (mean =1.5–3.82) to moult and because a high proportion (>39%) of insects defecated rapidly (<30 s) after feeding. 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Immature insects exhibited distinct intermoult periods without a direct relationship to a given species. Females of T. brasiliensis consumed an average of 1.9 times more meals (mean = 12.92 vs 6.63) and survived for a shorter period (mean =330.8 days) than T. melanica (mean = 365.2 days), probably due to the cost of reproduction (all significant at P<0.05). These data support the idea that T. brasiliensis is more adapted to lab conditions and is more able to infest domiciles than T. melanica. We also found significant distinctions in other features between these species, such as the elapsed time without eating before molting, which was higher for the second, third, and fifth nymph stages of T. melanica. Regarding features analyzed related to vector capacity, insects of all life stages of both species were considered competent to transmit Trypanosoma cruzi because they needed many feedings (mean =1.5–3.82) to moult and because a high proportion (>39%) of insects defecated rapidly (<30 s) after feeding. Overall, results highlight the need to extend vector surveillance to T. melanica.</abstract><cop>United States</cop><pub>Society for Vector Ecology</pub><pmid>27232124</pmid><doi>10.1111/jvec.12193</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Animals behavior Brazil Chagas Disease comparative bionomics eco-epidemiology Ecosystem Feeding Behavior Female Insect Vectors - classification Insect Vectors - parasitology ORIGINAL ARTICLES Triatoma - classification Triatoma - parasitology Triatominae Trypanosoma cruzi - isolation & purification Vector potential |
title | Vector Capacity of Members of Triatoma brasiliensis Species Complex: The Need to Extend Chagas Disease Surveillance to Triatoma melanica |
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