New scenarios of Trypanosoma cruzi transmission in the Orinoco region of Colombia
Rhodnius prolixus, a blood-sucking triatomine with domiciliary anthropophilic habits, is the main vector of Chagas disease. The current paradigm of Trypanosoma cruzi transmission in Columbia includes a sylvatic and domiciliary cycle co-existing with domestic and sylvatic populations of reservoirs. T...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Fundação Oswaldo Cruz (FIOCRUZ)
2015-05-01
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| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762015000300283&lng=en&tlng=en |
| _version_ | 1797757195609178112 |
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| author | Lina María Rendón Felipe Guhl Juan Manuel Cordovez Diana Erazo |
| author_facet | Lina María Rendón Felipe Guhl Juan Manuel Cordovez Diana Erazo |
| author_sort | Lina María Rendón |
| collection | DOAJ |
| description | Rhodnius prolixus, a blood-sucking triatomine with domiciliary anthropophilic habits, is the main vector of Chagas disease. The current paradigm of Trypanosoma cruzi transmission in Columbia includes a sylvatic and domiciliary cycle co-existing with domestic and sylvatic populations of reservoirs. The aim of this study is to evaluate the population densities and relative abundance of triatomines and mammals that may be involved in the sylvatic cycle of Chagas disease to clarify the epidemiological scenario in an endemic area in the province of Casanare. Insect vectors on Attalea butyracea palms were captured using both manual searches and bait traps. The capture of mammals was performed using Sherman and Tomahawk traps. We report an infestation index of 88.5% in 148 palms and an index of T. cruzi natural infection of 60.2% in 269 dissected insects and 11.9% in 160 captured mammals. High population densities of triatomines were observed in the sylvatic environment and there was a high relative abundance of reservoirs in the area, suggesting a stable enzootic cycle. We found no evidence of insect domiciliation. Taken together, these observations suggest that eco-epidemiological factors shape the transmission dynamics of T. cruzi, creating diverse scenarios of disease transmission. |
| first_indexed | 2024-03-12T18:12:26Z |
| format | Article |
| id | doaj.art-82e39592dad848c09eb083fea91df54c |
| institution | Directory Open Access Journal |
| issn | 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T18:12:26Z |
| publishDate | 2015-05-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-82e39592dad848c09eb083fea91df54c2023-08-02T09:15:11ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz1678-80602015-05-01110328328810.1590/0074-02760140403S0074-02762015000300283New scenarios of Trypanosoma cruzi transmission in the Orinoco region of ColombiaLina María RendónFelipe GuhlJuan Manuel CordovezDiana ErazoRhodnius prolixus, a blood-sucking triatomine with domiciliary anthropophilic habits, is the main vector of Chagas disease. The current paradigm of Trypanosoma cruzi transmission in Columbia includes a sylvatic and domiciliary cycle co-existing with domestic and sylvatic populations of reservoirs. The aim of this study is to evaluate the population densities and relative abundance of triatomines and mammals that may be involved in the sylvatic cycle of Chagas disease to clarify the epidemiological scenario in an endemic area in the province of Casanare. Insect vectors on Attalea butyracea palms were captured using both manual searches and bait traps. The capture of mammals was performed using Sherman and Tomahawk traps. We report an infestation index of 88.5% in 148 palms and an index of T. cruzi natural infection of 60.2% in 269 dissected insects and 11.9% in 160 captured mammals. High population densities of triatomines were observed in the sylvatic environment and there was a high relative abundance of reservoirs in the area, suggesting a stable enzootic cycle. We found no evidence of insect domiciliation. Taken together, these observations suggest that eco-epidemiological factors shape the transmission dynamics of T. cruzi, creating diverse scenarios of disease transmission.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762015000300283&lng=en&tlng=enRhodnius prolixusChagas diseaseAttalea butyraceainfestation indexinfection indexinsect domiciliation |
| spellingShingle | Lina María Rendón Felipe Guhl Juan Manuel Cordovez Diana Erazo New scenarios of Trypanosoma cruzi transmission in the Orinoco region of Colombia Memorias do Instituto Oswaldo Cruz Rhodnius prolixus Chagas disease Attalea butyracea infestation index infection index insect domiciliation |
| title | New scenarios of Trypanosoma cruzi transmission in the Orinoco region of Colombia |
| title_full | New scenarios of Trypanosoma cruzi transmission in the Orinoco region of Colombia |
| title_fullStr | New scenarios of Trypanosoma cruzi transmission in the Orinoco region of Colombia |
| title_full_unstemmed | New scenarios of Trypanosoma cruzi transmission in the Orinoco region of Colombia |
| title_short | New scenarios of Trypanosoma cruzi transmission in the Orinoco region of Colombia |
| title_sort | new scenarios of trypanosoma cruzi transmission in the orinoco region of colombia |
| topic | Rhodnius prolixus Chagas disease Attalea butyracea infestation index infection index insect domiciliation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762015000300283&lng=en&tlng=en |
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