Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent & León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions

Detalhes bibliográficos
Autor(a) principal: Villacís,Anita G
Data de Publicação: 2008
Outros Autores: Arcos-Terán,Laura, Grijalva,Mario J
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Memórias do Instituto Oswaldo Cruz
Texto Completo: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762008000700011
Resumo: Rhodnius ecuadoriensis is the second most important vector of Chagas Disease (CD) in Ecuador. The objective of this study was to describe (and compare) the life cycle, the feeding and defecation patterns under laboratory conditions of two populations of this specie [from the provinces of Manabí (Coastal region) and Loja (Andean region)]. Egg-to-adult (n = 57) development took an average of 189.9 ± 20 (Manabí) and 181.3 ± 6.4 days (Loja). Mortality rates were high among Lojan nymphs. Pre-feeding time (from contact with host to feeding initiation) ranged from 4 min 42 s [nymph I (NI)] to 8 min 30 s (male); feeding time ranged from 14 min 45 s (NI)-28 min 25 s (male) (Manabí) and from 15 min 25 s (NI)-28 min 57 s (nymph V) (Loja). The amount of blood ingested increased significantly with instar and was larger for Manabí specimens (p < 0.001). Defecation while feeding was observed in Manabí specimens from stage nymph III and in Lojan bugs from stage nymph IV. There was a gradual, age-related increase in the frequency of this behaviour in both populations. Our results suggest that R. ecuadoriensis has the bionomic traits of an efficient vector of Trypanosoma cruzi. Together with previous data on the capacity of this species to infest rural households, these results indicate that control of synanthropic R. ecuadoriensis populations in the coastal and Andean regions may have a significant impact for CD control in Ecuador and Northern Peru.
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spelling Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditionsChagas diseaseRhodnius ecuadoriensislife cyclefeeding and defecation patternsEcuadorRhodnius ecuadoriensis is the second most important vector of Chagas Disease (CD) in Ecuador. The objective of this study was to describe (and compare) the life cycle, the feeding and defecation patterns under laboratory conditions of two populations of this specie [from the provinces of Manabí (Coastal region) and Loja (Andean region)]. Egg-to-adult (n = 57) development took an average of 189.9 ± 20 (Manabí) and 181.3 ± 6.4 days (Loja). Mortality rates were high among Lojan nymphs. Pre-feeding time (from contact with host to feeding initiation) ranged from 4 min 42 s [nymph I (NI)] to 8 min 30 s (male); feeding time ranged from 14 min 45 s (NI)-28 min 25 s (male) (Manabí) and from 15 min 25 s (NI)-28 min 57 s (nymph V) (Loja). The amount of blood ingested increased significantly with instar and was larger for Manabí specimens (p < 0.001). Defecation while feeding was observed in Manabí specimens from stage nymph III and in Lojan bugs from stage nymph IV. There was a gradual, age-related increase in the frequency of this behaviour in both populations. Our results suggest that R. ecuadoriensis has the bionomic traits of an efficient vector of Trypanosoma cruzi. Together with previous data on the capacity of this species to infest rural households, these results indicate that control of synanthropic R. ecuadoriensis populations in the coastal and Andean regions may have a significant impact for CD control in Ecuador and Northern Peru.Instituto Oswaldo Cruz, Ministério da Saúde2008-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762008000700011Memórias do Instituto Oswaldo Cruz v.103 n.7 2008reponame:Memórias do Instituto Oswaldo Cruzinstname:Fundação Oswaldo Cruzinstacron:FIOCRUZ10.1590/S0074-02762008000700011info:eu-repo/semantics/openAccessVillacís,Anita GArcos-Terán,LauraGrijalva,Mario Jeng2020-04-25T17:50:22Zhttp://www.scielo.br/oai/scielo-oai.php0074-02761678-8060opendoar:null2020-04-26 02:15:49.407Memórias do Instituto Oswaldo Cruz - Fundação Oswaldo Cruztrue
dc.title.none.fl_str_mv Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
title Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
spellingShingle Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
Villacís,Anita G
Chagas disease
Rhodnius ecuadoriensis
life cycle
feeding and defecation patterns
Ecuador
title_short Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
title_full Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
title_fullStr Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
title_full_unstemmed Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
title_sort Life cycle, feeding and defecation patterns of Rhodnius ecuadoriensis (Lent &amp; León 1958) (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
author Villacís,Anita G
author_facet Villacís,Anita G
Arcos-Terán,Laura
Grijalva,Mario J
author_role author
author2 Arcos-Terán,Laura
Grijalva,Mario J
author2_role author
author
dc.contributor.author.fl_str_mv Villacís,Anita G
Arcos-Terán,Laura
Grijalva,Mario J
dc.subject.por.fl_str_mv Chagas disease
Rhodnius ecuadoriensis
life cycle
feeding and defecation patterns
Ecuador
topic Chagas disease
Rhodnius ecuadoriensis
life cycle
feeding and defecation patterns
Ecuador
dc.description.none.fl_txt_mv Rhodnius ecuadoriensis is the second most important vector of Chagas Disease (CD) in Ecuador. The objective of this study was to describe (and compare) the life cycle, the feeding and defecation patterns under laboratory conditions of two populations of this specie [from the provinces of Manabí (Coastal region) and Loja (Andean region)]. Egg-to-adult (n = 57) development took an average of 189.9 ± 20 (Manabí) and 181.3 ± 6.4 days (Loja). Mortality rates were high among Lojan nymphs. Pre-feeding time (from contact with host to feeding initiation) ranged from 4 min 42 s [nymph I (NI)] to 8 min 30 s (male); feeding time ranged from 14 min 45 s (NI)-28 min 25 s (male) (Manabí) and from 15 min 25 s (NI)-28 min 57 s (nymph V) (Loja). The amount of blood ingested increased significantly with instar and was larger for Manabí specimens (p < 0.001). Defecation while feeding was observed in Manabí specimens from stage nymph III and in Lojan bugs from stage nymph IV. There was a gradual, age-related increase in the frequency of this behaviour in both populations. Our results suggest that R. ecuadoriensis has the bionomic traits of an efficient vector of Trypanosoma cruzi. Together with previous data on the capacity of this species to infest rural households, these results indicate that control of synanthropic R. ecuadoriensis populations in the coastal and Andean regions may have a significant impact for CD control in Ecuador and Northern Peru.
description Rhodnius ecuadoriensis is the second most important vector of Chagas Disease (CD) in Ecuador. The objective of this study was to describe (and compare) the life cycle, the feeding and defecation patterns under laboratory conditions of two populations of this specie [from the provinces of Manabí (Coastal region) and Loja (Andean region)]. Egg-to-adult (n = 57) development took an average of 189.9 ± 20 (Manabí) and 181.3 ± 6.4 days (Loja). Mortality rates were high among Lojan nymphs. Pre-feeding time (from contact with host to feeding initiation) ranged from 4 min 42 s [nymph I (NI)] to 8 min 30 s (male); feeding time ranged from 14 min 45 s (NI)-28 min 25 s (male) (Manabí) and from 15 min 25 s (NI)-28 min 57 s (nymph V) (Loja). The amount of blood ingested increased significantly with instar and was larger for Manabí specimens (p < 0.001). Defecation while feeding was observed in Manabí specimens from stage nymph III and in Lojan bugs from stage nymph IV. There was a gradual, age-related increase in the frequency of this behaviour in both populations. Our results suggest that R. ecuadoriensis has the bionomic traits of an efficient vector of Trypanosoma cruzi. Together with previous data on the capacity of this species to infest rural households, these results indicate that control of synanthropic R. ecuadoriensis populations in the coastal and Andean regions may have a significant impact for CD control in Ecuador and Northern Peru.
publishDate 2008
dc.date.none.fl_str_mv 2008-11-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762008000700011
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762008000700011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0074-02762008000700011
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Instituto Oswaldo Cruz, Ministério da Saúde
publisher.none.fl_str_mv Instituto Oswaldo Cruz, Ministério da Saúde
dc.source.none.fl_str_mv Memórias do Instituto Oswaldo Cruz v.103 n.7 2008
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