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Abstract:

In the study area Triatoma guasayana Wygodzinsky & Abalos is the only wild triatomine found sympatric with Triatoma infestans (Klug) in peridomestic premises. The Trypanosoma cruzi Chagas wild cycle is centered around the same biotopes occupied by T. guasayana, which are also visited mainly by opossums with annual prevalences of 29-50%. Twelve hectares were sampled for 4 consecutive years during all seasons. During that time, 420 T. guasayana individuals were collected in 11.3% of 1,188 biotopes of 4 types, which included quimiles (the cactus Opuntia quimilo), chaguares (several species of bromeliads), trees, and logs. Quimiles had the highest percentage of positive biotopes (31.5%) followed by chaguares (22.3%), whereas 5% of the logs were found infested. During all seasons, 9.6-15.2% of biotopes were found infested. Distance to artificial biotopes was not statistically significant when comparing the frequency of triatomine numbers per biotope in all biotope-season combinations. With the exception of quimiles in the fall, the mean number of triatomines was higher in chaguares during all seasons. Triatomine abundance by biotope and season strata showed a clumped distribution, except for the quimiles biotope during the summer. When pooling by seasons, the mean number of triatomines in chaguares and quimiles biotope was higher than in logs and trees, with all biotopes showing a strong clumped distribution. When pooling by biotopes, the mean number of T. guasayana was relatively similar for all seasons, with a strong clumped distribution. The strong contagious distribution of T. guasayana in the hardwood forest biotopes may explain the maintenance of the wild cycle of T. cruzi, despite the low numbers and the low prevalences of the insect vector.

Registro:

Documento: Artículo
Título:Spatial Distribution of Triatoma guasayana (Hemiptera: Reduviidae) in Hardwood Forest Biotopes in Santiago del Estero, Argentina
Autor:Wisnivesky-Colli, C.; Schweigmann, N.J.; Pietrokovsky, S.; Bottazzi, V.; Rabinovich, J.E.
Filiación:U. Ecologia Reservorios V., Depto. de Ciencias Biológicas, Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina
Palabras clave:Biotopes; Clumped distribution; Triatoma guasayana; Trypanosoma cruzi; Wild triatomines; Cactaceae; Didelphidae; Hemiptera; Insecta; Opuntia; Opuntia quimilo; Reduviidae; Triatoma guasayana; Triatoma infestans; Trypanosoma; Trypanosoma cruzi; animal; Argentina; article; demography; female; human; male; season; Triatoma; Animals; Argentina; Demography; Female; Humans; Male; Seasons; Triatoma
Año:1997
Volumen:34
Número:2
Página de inicio:102
Página de fin:109
DOI: http://dx.doi.org/10.1093/jmedent/34.2.102
Título revista:Journal of Medical Entomology
Título revista abreviado:J. Med. Entomol.
ISSN:00222585
CODEN:JMENA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222585_v34_n2_p102_WisniveskyColli

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Citas:

---------- APA ----------
Wisnivesky-Colli, C., Schweigmann, N.J., Pietrokovsky, S., Bottazzi, V. & Rabinovich, J.E. (1997) . Spatial Distribution of Triatoma guasayana (Hemiptera: Reduviidae) in Hardwood Forest Biotopes in Santiago del Estero, Argentina. Journal of Medical Entomology, 34(2), 102-109.
http://dx.doi.org/10.1093/jmedent/34.2.102
---------- CHICAGO ----------
Wisnivesky-Colli, C., Schweigmann, N.J., Pietrokovsky, S., Bottazzi, V., Rabinovich, J.E. "Spatial Distribution of Triatoma guasayana (Hemiptera: Reduviidae) in Hardwood Forest Biotopes in Santiago del Estero, Argentina" . Journal of Medical Entomology 34, no. 2 (1997) : 102-109.
http://dx.doi.org/10.1093/jmedent/34.2.102
---------- MLA ----------
Wisnivesky-Colli, C., Schweigmann, N.J., Pietrokovsky, S., Bottazzi, V., Rabinovich, J.E. "Spatial Distribution of Triatoma guasayana (Hemiptera: Reduviidae) in Hardwood Forest Biotopes in Santiago del Estero, Argentina" . Journal of Medical Entomology, vol. 34, no. 2, 1997, pp. 102-109.
http://dx.doi.org/10.1093/jmedent/34.2.102
---------- VANCOUVER ----------
Wisnivesky-Colli, C., Schweigmann, N.J., Pietrokovsky, S., Bottazzi, V., Rabinovich, J.E. Spatial Distribution of Triatoma guasayana (Hemiptera: Reduviidae) in Hardwood Forest Biotopes in Santiago del Estero, Argentina. J. Med. Entomol. 1997;34(2):102-109.
http://dx.doi.org/10.1093/jmedent/34.2.102