First finding of melanic sylvatic triatoma infestans (Hemiptera: Reduviidae) colonies in the Argentine Chaco
Triatoma infestans (Klug), the most important vector of Chagas disease in southern South America, is a highly domiciliated species with well-known sylvatic foci only in the Bolivian Andean valleys and in the Bolivian Chaco, where melanic insects designated as "dark morphs" were found. Afte...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222585_v46_n5_p1195_Ceballos http://hdl.handle.net/20.500.12110/paper_00222585_v46_n5_p1195_Ceballos |
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paper:paper_00222585_v46_n5_p1195_Ceballos2023-06-08T14:48:28Z First finding of melanic sylvatic triatoma infestans (Hemiptera: Reduviidae) colonies in the Argentine Chaco Chagas disease Parrots Reinfestation Triatoma infestans Vector control Amazona aestiva Aratinga acuticaudata Aspidosperma Aspidosperma quebracho-blanco Hemiptera Hexapoda Psittacidae Reduviidae Triatoma infestans animal Argentina article ecosystem male mouse parrot pigmentation tree Triatoma Amazona Animals Argentina Ecosystem Male Mice Pigmentation Trees Triatoma Triatoma infestans (Klug), the most important vector of Chagas disease in southern South America, is a highly domiciliated species with well-known sylvatic foci only in the Bolivian Andean valleys and in the Bolivian Chaco, where melanic insects designated as "dark morphs" were found. After the tentative identification of two melanic bugs collected from parrot nests in a forest reserve in the Argentine Chaco as T. infestans, we conducted an intensive search there using mouse-baited sticky traps in summer 2006 and 2007. Four live T. infestans bugs were collected in trees without parrot nests in 288 trap-nights, whereas no bug was collected from inside trees with active parrot nests in 51 trap-nights. To increase bug captures, hollow tree trunks that recently had had Amazona aestiva (Berlepsch) and Aratinga acuticaudata (Vieillot) parrot nests were treated with insecticide fumigant canisters exhibiting strong knockdown power. Four (22%) of 18 trees were positive for T. infestans with a dark phenotype. A fragment of the mitochondrial gene COI of 8 of the 14 triatomine bugs collected was successfully sequenced and confirmed as T. infestans. Most of the bugs were captured from Aspidosperma quebracho-blanco (Schlechter) hollow tree trunks harboring parrot nests. All of the T. infestans collected from the nearest house located at 10 km from the sylvatic foci displayed normal chromatic characters. The repeated finding of T. infestans in sylvatic habitats, albeit at very low density, shows that this species is capable of maintaining viable sylvatic foci in the absence of human hosts and immigration from domestic populations. These are the first confirmed findings of sylvatic T. infestans colonies in Argentina and of dark morphs in the Argentine Chaco. © 2009 Entomological Society of America. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222585_v46_n5_p1195_Ceballos http://hdl.handle.net/20.500.12110/paper_00222585_v46_n5_p1195_Ceballos |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Chagas disease Parrots Reinfestation Triatoma infestans Vector control Amazona aestiva Aratinga acuticaudata Aspidosperma Aspidosperma quebracho-blanco Hemiptera Hexapoda Psittacidae Reduviidae Triatoma infestans animal Argentina article ecosystem male mouse parrot pigmentation tree Triatoma Amazona Animals Argentina Ecosystem Male Mice Pigmentation Trees Triatoma |
| spellingShingle |
Chagas disease Parrots Reinfestation Triatoma infestans Vector control Amazona aestiva Aratinga acuticaudata Aspidosperma Aspidosperma quebracho-blanco Hemiptera Hexapoda Psittacidae Reduviidae Triatoma infestans animal Argentina article ecosystem male mouse parrot pigmentation tree Triatoma Amazona Animals Argentina Ecosystem Male Mice Pigmentation Trees Triatoma First finding of melanic sylvatic triatoma infestans (Hemiptera: Reduviidae) colonies in the Argentine Chaco |
| topic_facet |
Chagas disease Parrots Reinfestation Triatoma infestans Vector control Amazona aestiva Aratinga acuticaudata Aspidosperma Aspidosperma quebracho-blanco Hemiptera Hexapoda Psittacidae Reduviidae Triatoma infestans animal Argentina article ecosystem male mouse parrot pigmentation tree Triatoma Amazona Animals Argentina Ecosystem Male Mice Pigmentation Trees Triatoma |
| description |
Triatoma infestans (Klug), the most important vector of Chagas disease in southern South America, is a highly domiciliated species with well-known sylvatic foci only in the Bolivian Andean valleys and in the Bolivian Chaco, where melanic insects designated as "dark morphs" were found. After the tentative identification of two melanic bugs collected from parrot nests in a forest reserve in the Argentine Chaco as T. infestans, we conducted an intensive search there using mouse-baited sticky traps in summer 2006 and 2007. Four live T. infestans bugs were collected in trees without parrot nests in 288 trap-nights, whereas no bug was collected from inside trees with active parrot nests in 51 trap-nights. To increase bug captures, hollow tree trunks that recently had had Amazona aestiva (Berlepsch) and Aratinga acuticaudata (Vieillot) parrot nests were treated with insecticide fumigant canisters exhibiting strong knockdown power. Four (22%) of 18 trees were positive for T. infestans with a dark phenotype. A fragment of the mitochondrial gene COI of 8 of the 14 triatomine bugs collected was successfully sequenced and confirmed as T. infestans. Most of the bugs were captured from Aspidosperma quebracho-blanco (Schlechter) hollow tree trunks harboring parrot nests. All of the T. infestans collected from the nearest house located at 10 km from the sylvatic foci displayed normal chromatic characters. The repeated finding of T. infestans in sylvatic habitats, albeit at very low density, shows that this species is capable of maintaining viable sylvatic foci in the absence of human hosts and immigration from domestic populations. These are the first confirmed findings of sylvatic T. infestans colonies in Argentina and of dark morphs in the Argentine Chaco. © 2009 Entomological Society of America. |
| title |
First finding of melanic sylvatic triatoma infestans (Hemiptera: Reduviidae) colonies in the Argentine Chaco |
| title_short |
First finding of melanic sylvatic triatoma infestans (Hemiptera: Reduviidae) colonies in the Argentine Chaco |
| title_full |
First finding of melanic sylvatic triatoma infestans (Hemiptera: Reduviidae) colonies in the Argentine Chaco |
| title_fullStr |
First finding of melanic sylvatic triatoma infestans (Hemiptera: Reduviidae) colonies in the Argentine Chaco |
| title_full_unstemmed |
First finding of melanic sylvatic triatoma infestans (Hemiptera: Reduviidae) colonies in the Argentine Chaco |
| title_sort |
first finding of melanic sylvatic triatoma infestans (hemiptera: reduviidae) colonies in the argentine chaco |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222585_v46_n5_p1195_Ceballos http://hdl.handle.net/20.500.12110/paper_00222585_v46_n5_p1195_Ceballos |
| _version_ |
1768543932423077888 |