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
Hauptverfasser: Folly-Ramos, Elaine, Dornak, L. Lynnette, Orsolon, Guilherme, Gonçalves, Teresa Cristina Monte, Lilioso, Mauricio, Costa, Jane, Almeida, Carlos Eduardo
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container_issue 1
container_start_page 48
container_title Journal of vector ecology
container_volume 41
creator Folly-Ramos, Elaine
Dornak, L. Lynnette
Orsolon, Guilherme
Gonçalves, Teresa Cristina Monte
Lilioso, Mauricio
Costa, Jane
Almeida, Carlos Eduardo
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 (
doi_str_mv 10.1111/jvec.12193
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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&lt;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 (&gt;39%) of insects defecated rapidly (&lt;30 s) after feeding. 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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. 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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 (&gt;39%) of insects defecated rapidly (&lt;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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source MEDLINE; EZB-FREE-00999 freely available EZB journals
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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