| 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 ... | 1992 | 1566301 |
| determinants of the domiciliary density of triatoma infestans, vector of chagas disease. | in two heavily infested rural villages of santiago del estero, argentina, where no indoor-spraying with residual insecticides had ever been carried out by official control services, we studied the influence of roof and wall structure, domestic use of insecticide, family size and the number of domestic dogs, on the domiciliary density of triatoma infestans (klug). bug density was significantly associated with (1) the interaction between insecticide use and type of roof, (2) the structure of indoo ... | 1992 | 1600232 |
| [home ecology of trypanosomiasis americana: feeding profile of triatoma infestans in a rural area of the santiago del estero province, argentina]. | | 1987 | 3333976 |
| interaction between didelphis albiventris and triatoma infestans in relation to trypanosoma cruzi transmission. | this paper attempts to prove if a high trypanosoma cruzi prevalence of opossums might be reached with few potential infective contacts. one non-infected didelphis albiventris to t. cruzi and 10 infected nymphs of triatoma infestans were left together during 23 hr in a device that simulated a natural opossum burrow. twenty-six replicates were performed using marsupials and triatomines only once. potentially infective contacts occurred in all the trials. from the 26 opossums used in trials, 54% di ... | 1995 | 8731363 |
| evaluation of dogs as sentinels of the transmission of trypanosoma cruzi in a rural area of north-western argentina. | dogs, the main domestic reservoirs of trypanosoma cruzi in the argentine chaco, may be useful as sentinels of vector-mediated transmission of trypanosoma cruzi in control programmes if canine infections acquired by all other routes could be excluded. in the present study, in the province of santiago del estero, argentina, the dog populations in the neighbouring villages of amamá, trinidad, mercedes, villa matilde and pampa pozo were studied immediately before spraying of residual insecticides (i ... | 1998 | 9924546 |
| [control campaigns against triatoma infestans in a rural community of northwestern argentina]. | control campaigns against triatoma infestans, the principal vector of trypanosoma cruzi, have relied on the application of residual insecticides and have regarded the system as homogeneous. reinfestation generally starts in peri-domestic residual foci or in preexisting foci that escaped spraying for diverse reasons. from these foci t. infestans adults actively invade other sites, or they are transported passively within objects or goods from infested communities. in the absence of additional spr ... | 1999 | 10668242 |
| potential colonization of the peridomicile by triatoma guasayana (hemiptera:reduviidae) in santiago del estero, argentina. | sylvatic triatomines might use the peridomicile as a 1st step in the process of domiciliation. therefore, we evaluated the capability of sylvatic species to colonize the peridomicile of a rural area in the province of santiago del estero, argentina. the research was carried out in 6 houses in the village of trinidad. the person per hour capture method was employed to determine the presence of triatomines in all the buildings (n = 44). dispersing adults were collected by means of light traps and ... | 1996 | 8699459 |
| probability of transmission of chagas disease by triatoma infestans (hemiptera: reduviidae) in an endemic area of santiago del estero, argentina. | the daily probability (p) of transmission of trypanosoma cruzi to a noninfected human host by an infected triatoma infestans bug was estimated using field data from a 2-year longitudinal study carried out in a rural settlement of 20 households in amamá, santiago del estero, argentina. the following information was used for this purpose: the bug density and the proportion of infected bugs; the bug biting rate and the distribution of bites between humans and animals; the age-specific seropositivit ... | 1990 | 2127382 |
| spatial distribution of triatoma guasayana (hemiptera:reduviidae) in hardwood forest biotopes in santiago del estero, argentina. | 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 ... | 1997 | 9103752 |
| [control of the transmission of trypanosoma cruzi in argentina 1999]. | approximately 2 million people in argentina are infected with trypanosoma cruzi, the etiologic agent of chagas disease, thereby constituting the major tropical disease in the country. as in other six southern cone countries, triatoma infestans is the only or major vector of t. cruzi among human and domestic animals. in argentina, a vertically structured national chagas control program was established in 1962. such a program pursued the elimination of domestic and peri-domestic populations of t. ... | 1999 | 10668249 |
| dispersive flight and house invasion by triatoma guasayana and triatoma sordida in argentina. | flight activity and invasion of houses by triatoma sordida and t. guasayana were studied in the province of santiago del estero, argentina. spontaneous findings of both species in houses were recorded from 1982 to 1989. light trap collections were performed in 1982, 1983 and 1984, at the woods surrounding the settlements of amamá (43 houses) and trinidad (19 houses). most of the 101 triatomines collected, were unfed and negative for trypanosoma cruzi. t. guasayana predominated over t. sordida, a ... | 1993 | 8246755 |