Domestic animal hosts strongly influence human-feeding rates of the Chagas disease vector Triatoma infestans in Argentina.
The host species composition in a household and their relative availability affect the host-feeding choices of blood-sucking insects and parasite transmission risks. We investigated four hypotheses regarding factors that affect blood-feeding rates, proportion of human-fed bugs (human blood index), a...
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ftdoajarticles:oai:doaj.org/article:b76e9c1873f14902864e9f5457c900c2 2023-05-15T15:16:36+02:00 Domestic animal hosts strongly influence human-feeding rates of the Chagas disease vector Triatoma infestans in Argentina. Ricardo E Gürtler María C Cecere Gonzalo M Vázquez-Prokopec Leonardo A Ceballos Juan M Gurevitz María Del Pilar Fernández Uriel Kitron Joel E Cohen 2014-01-01T00:00:00Z https://doi.org/10.1371/journal.pntd.0002894 https://doaj.org/article/b76e9c1873f14902864e9f5457c900c2 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4037315?pdf=render https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0002894 https://doaj.org/article/b76e9c1873f14902864e9f5457c900c2 PLoS Neglected Tropical Diseases, Vol 8, Iss 5, p e2894 (2014) Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 article 2014 ftdoajarticles https://doi.org/10.1371/journal.pntd.0002894 2022-12-31T15:55:26Z The host species composition in a household and their relative availability affect the host-feeding choices of blood-sucking insects and parasite transmission risks. We investigated four hypotheses regarding factors that affect blood-feeding rates, proportion of human-fed bugs (human blood index), and daily human-feeding rates of Triatoma infestans, the main vector of Chagas disease.A cross-sectional survey collected triatomines in human sleeping quarters (domiciles) of 49 of 270 rural houses in northwestern Argentina. We developed an improved way of estimating the human-feeding rate of domestic T. infestans populations. We fitted generalized linear mixed-effects models to a global model with six explanatory variables (chicken blood index, dog blood index, bug stage, numbers of human residents, bug abundance, and maximum temperature during the night preceding bug catch) and three response variables (daily blood-feeding rate, human blood index, and daily human-feeding rate). Coefficients were estimated via multimodel inference with model averaging.Median blood-feeding intervals per late-stage bug were 4.1 days, with large variations among households. The main bloodmeal sources were humans (68%), chickens (22%), and dogs (9%). Blood-feeding rates decreased with increases in the chicken blood index. Both the human blood index and daily human-feeding rate decreased substantially with increasing proportions of chicken- or dog-fed bugs, or the presence of chickens indoors. Improved calculations estimated the mean daily human-feeding rate per late-stage bug at 0.231 (95% confidence interval, 0.157-0.305).Based on the changing availability of chickens in domiciles during spring-summer and the much larger infectivity of dogs compared with humans, we infer that the net effects of chickens in the presence of transmission-competent hosts may be more adequately described by zoopotentiation than by zooprophylaxis. Domestic animals in domiciles profoundly affect the host-feeding choices, human-vector contact rates and parasite ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Argentina PLoS Neglected Tropical Diseases 8 5 e2894 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
spellingShingle |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 Ricardo E Gürtler María C Cecere Gonzalo M Vázquez-Prokopec Leonardo A Ceballos Juan M Gurevitz María Del Pilar Fernández Uriel Kitron Joel E Cohen Domestic animal hosts strongly influence human-feeding rates of the Chagas disease vector Triatoma infestans in Argentina. |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
description |
The host species composition in a household and their relative availability affect the host-feeding choices of blood-sucking insects and parasite transmission risks. We investigated four hypotheses regarding factors that affect blood-feeding rates, proportion of human-fed bugs (human blood index), and daily human-feeding rates of Triatoma infestans, the main vector of Chagas disease.A cross-sectional survey collected triatomines in human sleeping quarters (domiciles) of 49 of 270 rural houses in northwestern Argentina. We developed an improved way of estimating the human-feeding rate of domestic T. infestans populations. We fitted generalized linear mixed-effects models to a global model with six explanatory variables (chicken blood index, dog blood index, bug stage, numbers of human residents, bug abundance, and maximum temperature during the night preceding bug catch) and three response variables (daily blood-feeding rate, human blood index, and daily human-feeding rate). Coefficients were estimated via multimodel inference with model averaging.Median blood-feeding intervals per late-stage bug were 4.1 days, with large variations among households. The main bloodmeal sources were humans (68%), chickens (22%), and dogs (9%). Blood-feeding rates decreased with increases in the chicken blood index. Both the human blood index and daily human-feeding rate decreased substantially with increasing proportions of chicken- or dog-fed bugs, or the presence of chickens indoors. Improved calculations estimated the mean daily human-feeding rate per late-stage bug at 0.231 (95% confidence interval, 0.157-0.305).Based on the changing availability of chickens in domiciles during spring-summer and the much larger infectivity of dogs compared with humans, we infer that the net effects of chickens in the presence of transmission-competent hosts may be more adequately described by zoopotentiation than by zooprophylaxis. Domestic animals in domiciles profoundly affect the host-feeding choices, human-vector contact rates and parasite ... |
format |
Article in Journal/Newspaper |
author |
Ricardo E Gürtler María C Cecere Gonzalo M Vázquez-Prokopec Leonardo A Ceballos Juan M Gurevitz María Del Pilar Fernández Uriel Kitron Joel E Cohen |
author_facet |
Ricardo E Gürtler María C Cecere Gonzalo M Vázquez-Prokopec Leonardo A Ceballos Juan M Gurevitz María Del Pilar Fernández Uriel Kitron Joel E Cohen |
author_sort |
Ricardo E Gürtler |
title |
Domestic animal hosts strongly influence human-feeding rates of the Chagas disease vector Triatoma infestans in Argentina. |
title_short |
Domestic animal hosts strongly influence human-feeding rates of the Chagas disease vector Triatoma infestans in Argentina. |
title_full |
Domestic animal hosts strongly influence human-feeding rates of the Chagas disease vector Triatoma infestans in Argentina. |
title_fullStr |
Domestic animal hosts strongly influence human-feeding rates of the Chagas disease vector Triatoma infestans in Argentina. |
title_full_unstemmed |
Domestic animal hosts strongly influence human-feeding rates of the Chagas disease vector Triatoma infestans in Argentina. |
title_sort |
domestic animal hosts strongly influence human-feeding rates of the chagas disease vector triatoma infestans in argentina. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pntd.0002894 https://doaj.org/article/b76e9c1873f14902864e9f5457c900c2 |
geographic |
Arctic Argentina |
geographic_facet |
Arctic Argentina |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
PLoS Neglected Tropical Diseases, Vol 8, Iss 5, p e2894 (2014) |
op_relation |
http://europepmc.org/articles/PMC4037315?pdf=render https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0002894 https://doaj.org/article/b76e9c1873f14902864e9f5457c900c2 |
op_doi |
https://doi.org/10.1371/journal.pntd.0002894 |
container_title |
PLoS Neglected Tropical Diseases |
container_volume |
8 |
container_issue |
5 |
container_start_page |
e2894 |
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1766346899069075456 |