Long-term reduction of Trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern Argentina
Long-term variations in the dynamics and intensity of sylvatic transmission of Trypanosoma cruzi were investigated around eight rural villages in the semiarid Argentine Chaco in 2002-2004 and compared to data collected locally in 1984-1991. Of 501 wild mammals from 13 identified species examined by...
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2006
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0001706X_v98_n3_p286_Ceballos http://hdl.handle.net/20.500.12110/paper_0001706X_v98_n3_p286_Ceballos |
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paper:paper_0001706X_v98_n3_p286_Ceballos2023-06-08T14:21:21Z Long-term reduction of Trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern Argentina Ceballos, Leonardo Adrián Cardinal, Marta Victoria Vázquez-Prokopec, Gonzalo Martín Lauricella, Marta Alicia Orozco, Maria Marcela Schijman, Alejandro Gabriel Gurtler, Ricardo Esteban Conepatus Deforestation Didelphis Force of infection Land use change Opossums Reservoirs Skunks Trypanosoma cruzi insecticide deforestation disease control disease prevalence infectious disease insecticide mammal semiarid region trypanosomiasis age distribution animal experiment animal model Argentina article Carnivora comparative study controlled study deforestation female fox habitat structure mammal microbial population dynamics mouse nonhuman opossum parasite vector prevalence rural area seasonal variation spring summer Trypanosoma cruzi trypanosomiasis xenodiagnosis Animal Diseases Animals Argentina Chagas Disease Conservation of Natural Resources Mammals Trees Trypanosoma cruzi Argentina Chaco [Argentina] South America Canidae Conepatus chinga Didelphidae Didelphis albiventris Mammalia Mephitidae Triatoma infestans Trypanosoma cruzi Long-term variations in the dynamics and intensity of sylvatic transmission of Trypanosoma cruzi were investigated around eight rural villages in the semiarid Argentine Chaco in 2002-2004 and compared to data collected locally in 1984-1991. Of 501 wild mammals from 13 identified species examined by xenodiagnosis, only 3 (7.9%) of 38 Didelphis albiventris opossums and 1 (1.1%) of 91 Conepatus chinga skunks were infected by T. cruzi. The period prevalence in opossums was four-fold lower in 2002-2004 than in 1984-1991 (32-36%). The infection prevalence of skunks also decreased five-fold from 4.1-5.6% in 1984-1991 to 1.1% in 2002-2004. Infection in opossums increased with age and from summer to spring in both study periods. The force of infection per 100 opossum-months after weaning declined more than six-fold from 8.2 in 1988-1991 to 1.2 in 2002-2004. Opossums were mainly infected by T. cruzi lineage I and secondarily by lineage IId in 1984-1991, and only by T. cruzi I in 2002-2004; skunks were infected by T. cruzi IId in 1984-1991 and by IIc in 2002-2004. The striking decline of T. cruzi infection in opossums and skunks occurred in parallel to community-wide insecticide spraying followed by selective sprays leading to very low densities of infected Triatoma infestans in domestic and peridomestic habitats since 1992; to massive deforestation around one of the villages or selective extraction of older trees, and apparent reductions in opossum abundance jointly with increases in foxes and skunks. These factors may underlie the dramatic decrease of T. cruzi infection in wild reservoir hosts. © 2006 Elsevier B.V. All rights reserved. Fil:Ceballos, L.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cardinal, M.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vazquez-Prokopec, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lauricella, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Orozco, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Schijman, A.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gürtler, R.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0001706X_v98_n3_p286_Ceballos http://hdl.handle.net/20.500.12110/paper_0001706X_v98_n3_p286_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 |
Conepatus Deforestation Didelphis Force of infection Land use change Opossums Reservoirs Skunks Trypanosoma cruzi insecticide deforestation disease control disease prevalence infectious disease insecticide mammal semiarid region trypanosomiasis age distribution animal experiment animal model Argentina article Carnivora comparative study controlled study deforestation female fox habitat structure mammal microbial population dynamics mouse nonhuman opossum parasite vector prevalence rural area seasonal variation spring summer Trypanosoma cruzi trypanosomiasis xenodiagnosis Animal Diseases Animals Argentina Chagas Disease Conservation of Natural Resources Mammals Trees Trypanosoma cruzi Argentina Chaco [Argentina] South America Canidae Conepatus chinga Didelphidae Didelphis albiventris Mammalia Mephitidae Triatoma infestans Trypanosoma cruzi |
| spellingShingle |
Conepatus Deforestation Didelphis Force of infection Land use change Opossums Reservoirs Skunks Trypanosoma cruzi insecticide deforestation disease control disease prevalence infectious disease insecticide mammal semiarid region trypanosomiasis age distribution animal experiment animal model Argentina article Carnivora comparative study controlled study deforestation female fox habitat structure mammal microbial population dynamics mouse nonhuman opossum parasite vector prevalence rural area seasonal variation spring summer Trypanosoma cruzi trypanosomiasis xenodiagnosis Animal Diseases Animals Argentina Chagas Disease Conservation of Natural Resources Mammals Trees Trypanosoma cruzi Argentina Chaco [Argentina] South America Canidae Conepatus chinga Didelphidae Didelphis albiventris Mammalia Mephitidae Triatoma infestans Trypanosoma cruzi Ceballos, Leonardo Adrián Cardinal, Marta Victoria Vázquez-Prokopec, Gonzalo Martín Lauricella, Marta Alicia Orozco, Maria Marcela Schijman, Alejandro Gabriel Gurtler, Ricardo Esteban Long-term reduction of Trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern Argentina |
| topic_facet |
Conepatus Deforestation Didelphis Force of infection Land use change Opossums Reservoirs Skunks Trypanosoma cruzi insecticide deforestation disease control disease prevalence infectious disease insecticide mammal semiarid region trypanosomiasis age distribution animal experiment animal model Argentina article Carnivora comparative study controlled study deforestation female fox habitat structure mammal microbial population dynamics mouse nonhuman opossum parasite vector prevalence rural area seasonal variation spring summer Trypanosoma cruzi trypanosomiasis xenodiagnosis Animal Diseases Animals Argentina Chagas Disease Conservation of Natural Resources Mammals Trees Trypanosoma cruzi Argentina Chaco [Argentina] South America Canidae Conepatus chinga Didelphidae Didelphis albiventris Mammalia Mephitidae Triatoma infestans Trypanosoma cruzi |
| description |
Long-term variations in the dynamics and intensity of sylvatic transmission of Trypanosoma cruzi were investigated around eight rural villages in the semiarid Argentine Chaco in 2002-2004 and compared to data collected locally in 1984-1991. Of 501 wild mammals from 13 identified species examined by xenodiagnosis, only 3 (7.9%) of 38 Didelphis albiventris opossums and 1 (1.1%) of 91 Conepatus chinga skunks were infected by T. cruzi. The period prevalence in opossums was four-fold lower in 2002-2004 than in 1984-1991 (32-36%). The infection prevalence of skunks also decreased five-fold from 4.1-5.6% in 1984-1991 to 1.1% in 2002-2004. Infection in opossums increased with age and from summer to spring in both study periods. The force of infection per 100 opossum-months after weaning declined more than six-fold from 8.2 in 1988-1991 to 1.2 in 2002-2004. Opossums were mainly infected by T. cruzi lineage I and secondarily by lineage IId in 1984-1991, and only by T. cruzi I in 2002-2004; skunks were infected by T. cruzi IId in 1984-1991 and by IIc in 2002-2004. The striking decline of T. cruzi infection in opossums and skunks occurred in parallel to community-wide insecticide spraying followed by selective sprays leading to very low densities of infected Triatoma infestans in domestic and peridomestic habitats since 1992; to massive deforestation around one of the villages or selective extraction of older trees, and apparent reductions in opossum abundance jointly with increases in foxes and skunks. These factors may underlie the dramatic decrease of T. cruzi infection in wild reservoir hosts. © 2006 Elsevier B.V. All rights reserved. |
| author |
Ceballos, Leonardo Adrián Cardinal, Marta Victoria Vázquez-Prokopec, Gonzalo Martín Lauricella, Marta Alicia Orozco, Maria Marcela Schijman, Alejandro Gabriel Gurtler, Ricardo Esteban |
| author_facet |
Ceballos, Leonardo Adrián Cardinal, Marta Victoria Vázquez-Prokopec, Gonzalo Martín Lauricella, Marta Alicia Orozco, Maria Marcela Schijman, Alejandro Gabriel Gurtler, Ricardo Esteban |
| author_sort |
Ceballos, Leonardo Adrián |
| title |
Long-term reduction of Trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern Argentina |
| title_short |
Long-term reduction of Trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern Argentina |
| title_full |
Long-term reduction of Trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern Argentina |
| title_fullStr |
Long-term reduction of Trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern Argentina |
| title_full_unstemmed |
Long-term reduction of Trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern Argentina |
| title_sort |
long-term reduction of trypanosoma cruzi infection in sylvatic mammals following deforestation and sustained vector surveillance in northwestern argentina |
| publishDate |
2006 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0001706X_v98_n3_p286_Ceballos http://hdl.handle.net/20.500.12110/paper_0001706X_v98_n3_p286_Ceballos |
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