sylvatic american trypanosomiasis in argentina. trypanosoma cruzi infection in mammals from the chaco forest in santiago del estero.trypanosoma cruzi infection in sylvatic mammals of the quebracho woods of the eastern part of santiago del estero province, argentina, was studied from october 1984 to december 1987. 301 mammals of 20 different species were caught. t. cruzi, characterized biologically and biochemically, was isolated by xenodiagnosis from 23 of 72 (32%) didelphis albiventris opposums, 2/36 (5.5%) conepatus chinga skunks, and one ferret (galictis cuja). 53 opossum refuges were located and triatomine bugs were foun ...19921566301
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 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 2002-20 ...200616839513
serologic evidence of canine parvovirus in domestic dogs, wild carnivores, and marsupials in the argentinean chaco.the transmission of pathogens between domestic dogs and generalist wildlife species may be modified by environmental degradation, biodiversity losses, host densities, and increased contact rates in remnant forest patches. a serologic survey of canine parvovirus (cpv) in rural domestic dogs and wild mammals was conducted in two neighboring rural areas (disturbed and protected) from pampa del indio, northeastern argentina, between 2008 and 2011. a total of 174 domestic dogs and 26 wild mammals-4 c ...201425314822
a comparative study of trypanosoma cruzi infection in sylvatic mammals from a protected and a disturbed area in the argentine chaco.understanding the complex epidemiology of trypanosoma cruzi transmission cycles requires comparative studies in widely different environments. we assessed the occurrence of t. cruzi infection in sylvatic mammals, their infectiousness to the vector, and parasite genotypes in a protected area of the argentine chaco, and compared them with information obtained similarly in a nearby disturbed area. a total of 278 mammals from >23 species in the protected area were diagnosed for t. cruzi infection us ...201626708994
new sylvatic hosts of trypanosoma cruzi and their reservoir competence in the humid chaco of argentina: a longitudinal study.a four-year longitudinal study of the structure of sylvatic transmission cycles of trypanosoma cruzi, reservoir host competence and parasite discrete typing units was conducted in a disturbed rural area of the humid chaco in argentina. among 190 mammals examined by xenodiagnosis and polymerase chain reaction amplification, the composite prevalence of infection was substantially higher in dasypus novemcinctus armadillos (57.7%) and didelphis albiventris opossums (38.1%) than in euphractus sexcinc ...201323530075
direct molecular identification of trypanosoma cruzi discrete typing units in domestic and peridomestic triatoma infestans and triatoma sordida from the argentine chaco.we assessed the distribution of trypanosoma cruzi discrete typing units (dtus) in domestic and peridomestic triatoma infestans and triatoma sordida specimens collected in a well-defined rural area in pampa del indio, northeastern argentina. microscopically-positive bugs were randomly selected with a multi-level sampling design, and dtus were identified using direct pcr strategies. tcvi predominated in 61% of 69 t. infestans and in 56% of 9 t. sordida. tcv was the secondary dtu in t. infestans (1 ...201223036510
the sylvatic transmission cycle of trypanosoma cruzi in a rural area in the humid chaco of argentina.little is known about the sylvatic transmission cycle of trypanosoma cruzi in the gran chaco ecoregion. we conducted surveys to identify the main sylvatic hosts of t. cruzi, parasite discrete typing units and vector species involved in pampa del indio, a rural area in the humid argentinean chaco. a total of 44 mammals from 14 species were captured and examined for infection by xenodiagnosis and polymerase chain reaction amplification of the hyper-variable region of kinetoplast dna minicircles of ...201222771688
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