Study of the prevalence of infection by Trypanosoma cruzi in opossums (Didelphis albiventris) in Santiago del Estero, Argentina

The opossum of the genus Didelphis is one of the principal wild reservoirs of Trypanosoma cruzi and is widely distributed in the Western Hemisphere. Didelphis albiventris is the most common marsupial in Amama and Trinidad, two communities in the province of Santiago del Estero, Argentina. The D. alb...

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Detalles Bibliográficos
Autores principales: Schweigmann, N.J., Pietrokovsky, S., Bottazzi, V., Conti, O., Bujas, M.A., Wisnivesky-Colli, C.
Formato: JOUR
Materias:
disease prevalence
infectious disease
mammal
parasite
Argentina
article
geographic distribution
nonhuman
parasite transmission
prevalence
protozoal infection
reproduction
seasonal variation
Trypanosoma cruzi
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10204989_v6_n6_p371_Schweigmann
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_10204989_v6_n6_p371_Schweigmann
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spelling todo:paper_10204989_v6_n6_p371_Schweigmann2023-10-03T15:56:34Z Study of the prevalence of infection by Trypanosoma cruzi in opossums (Didelphis albiventris) in Santiago del Estero, Argentina Schweigmann, N.J. Pietrokovsky, S. Bottazzi, V. Conti, O. Bujas, M.A. Wisnivesky-Colli, C. disease prevalence infectious disease mammal parasite Argentina article geographic distribution nonhuman parasite transmission prevalence protozoal infection reproduction seasonal variation Trypanosoma cruzi Argentina The opossum of the genus Didelphis is one of the principal wild reservoirs of Trypanosoma cruzi and is widely distributed in the Western Hemisphere. Didelphis albiventris is the most common marsupial in Amama and Trinidad, two communities in the province of Santiago del Estero, Argentina. The D. albiventris population is replaced every year, and the opossum normally has two reproductive periods, one at the beginning of the spring and another at the beginning of the summer. The two litters are weaned, and they leave the mother's marsupial pouch to join the population, the first (G1) at the beginning of the summer and the second (G2) at the beginning of the fall. Between 1988 and 1991 409 D. albiventris opossums were studied, and xenodiagnoses showed that 35% of them were infected with T. cruzi. Annual cycles of renewed infection were observed, with prevalences that ranged between 22% and 43%. The acquisition of the parasite occurred over the entire year, from the summer through the spring. The prevalence of infection increased with age. The G1 individuals tended to present higher prevalences than the G2 individuals, probably from being exposed to transmission for a longer period of time. In the first two (younger) age categories for the opossums, G2 individuals showed higher prevalences than did the G1 individuals. This indicates a significant increase in transmission intensity during the fall. Opossums should be regarded as a potential source of T. cruzi entry to the domestic transmission cycle. Fil:Schweigmann, N.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pietrokovsky, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Wisnivesky-Colli, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10204989_v6_n6_p371_Schweigmann
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic disease prevalence
infectious disease
mammal
parasite
Argentina
article
geographic distribution
nonhuman
parasite transmission
prevalence
protozoal infection
reproduction
seasonal variation
Trypanosoma cruzi
Argentina
spellingShingle disease prevalence
infectious disease
mammal
parasite
Argentina
article
geographic distribution
nonhuman
parasite transmission
prevalence
protozoal infection
reproduction
seasonal variation
Trypanosoma cruzi
Argentina
Schweigmann, N.J.
Pietrokovsky, S.
Bottazzi, V.
Conti, O.
Bujas, M.A.
Wisnivesky-Colli, C.
Study of the prevalence of infection by Trypanosoma cruzi in opossums (Didelphis albiventris) in Santiago del Estero, Argentina
topic_facet disease prevalence
infectious disease
mammal
parasite
Argentina
article
geographic distribution
nonhuman
parasite transmission
prevalence
protozoal infection
reproduction
seasonal variation
Trypanosoma cruzi
Argentina
description The opossum of the genus Didelphis is one of the principal wild reservoirs of Trypanosoma cruzi and is widely distributed in the Western Hemisphere. Didelphis albiventris is the most common marsupial in Amama and Trinidad, two communities in the province of Santiago del Estero, Argentina. The D. albiventris population is replaced every year, and the opossum normally has two reproductive periods, one at the beginning of the spring and another at the beginning of the summer. The two litters are weaned, and they leave the mother's marsupial pouch to join the population, the first (G1) at the beginning of the summer and the second (G2) at the beginning of the fall. Between 1988 and 1991 409 D. albiventris opossums were studied, and xenodiagnoses showed that 35% of them were infected with T. cruzi. Annual cycles of renewed infection were observed, with prevalences that ranged between 22% and 43%. The acquisition of the parasite occurred over the entire year, from the summer through the spring. The prevalence of infection increased with age. The G1 individuals tended to present higher prevalences than the G2 individuals, probably from being exposed to transmission for a longer period of time. In the first two (younger) age categories for the opossums, G2 individuals showed higher prevalences than did the G1 individuals. This indicates a significant increase in transmission intensity during the fall. Opossums should be regarded as a potential source of T. cruzi entry to the domestic transmission cycle.
format JOUR
author Schweigmann, N.J.
Pietrokovsky, S.
Bottazzi, V.
Conti, O.
Bujas, M.A.
Wisnivesky-Colli, C.
author_facet Schweigmann, N.J.
Pietrokovsky, S.
Bottazzi, V.
Conti, O.
Bujas, M.A.
Wisnivesky-Colli, C.
author_sort Schweigmann, N.J.
title Study of the prevalence of infection by Trypanosoma cruzi in opossums (Didelphis albiventris) in Santiago del Estero, Argentina
title_short Study of the prevalence of infection by Trypanosoma cruzi in opossums (Didelphis albiventris) in Santiago del Estero, Argentina
title_full Study of the prevalence of infection by Trypanosoma cruzi in opossums (Didelphis albiventris) in Santiago del Estero, Argentina
title_fullStr Study of the prevalence of infection by Trypanosoma cruzi in opossums (Didelphis albiventris) in Santiago del Estero, Argentina
title_full_unstemmed Study of the prevalence of infection by Trypanosoma cruzi in opossums (Didelphis albiventris) in Santiago del Estero, Argentina
title_sort study of the prevalence of infection by trypanosoma cruzi in opossums (didelphis albiventris) in santiago del estero, argentina
url http://hdl.handle.net/20.500.12110/paper_10204989_v6_n6_p371_Schweigmann
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