| an outbreak of acute chagas's disease in the são francisco valley region of bahia, brazil: triatomine vectors and animal reservoirs of trypanosoma cruzi. | following reports of an unusually high incidence of acute chagas's disease and the appearance of large numbers of triatoma infestans in the southwestern region of the state of bahia, triatomine bugs (hemiptera: reduviidae) and domestic animals in one of the affected communities were surveyed and examined for infection with trypanosoma cruzi. triatoma infestans was prevalent in houses and was also found in peridomestic habitats. t. sordida and t. pseudomaculata occupied peridomestic and sylvatic ... | 1979 | 120045 |
| human behaviour and the propagation of chagaś disease. | during 12 months, 26 households with 172 residents in são felipe, bahia, brazil, entertained 74 different guests who were potentially exposed to attack by panstrongylus megistus for an average of about 23 nights per guest per year. during the same period 52 of the residents spent an average of about two weeks a year away from home. these exchanges established contact with 79 other households in the district. these and other observations reinforce the opinion that human behaviour plays an importa ... | 1976 | 402723 |
| the identification by isoenzyme patterns of two distinct strain-groups of trypanosoma cruzi, circulating independently in a rural area of brazil. | culture forms of 17 trypanosoma cruzi stocks, primarily isolated from a rural area of endemic chagas disease at são felipe, bahia, brazil, were compared by the electrophoretic patterns of six enzymes: aspartate aminotransferase, alanine aminotransferase, glucose-6-phosphate dehydrogenase, malate dehydrogenase (decarb-oxylating) (nadp+), glucosephosphate isomerase and phosphoglucomutase. two markedly distinct combinations of isoenzyme patterns were seen, justifying the arrangement of the 17 stock ... | 1977 | 407674 |
| association between household triatomine density and incidence of trypanosoma cruzi infection during a nine-year study in castro alves, bahia, brazil. | we studied the association between human incidence of trypanosoma cruzi infection and household infestation density of panstrongylus megistus in castro alves, bahia, brazil. during a 9-year period, 19 persons seroconverted; 17 were children, 17 lived in nonplastered houses, and 13 lived in houses infested with triatomines. although 6 seroconverting persons lived in houses where triatomines could not be found, the risk of seroconversion was significantly greater in infested houses and 16 times gr ... | 1985 | 3929635 |
| differences in saliva composition among three brazilian populations of panstrongylus megistus (hemiptera, reduviidae). | comparisons of electrophoretic profiles of triatomines (panstrongylus megistus) from the brazilian states of bahia (ba), minas gerais (mg) and santa catarina (sc) revealed differences in the composition of the saliva between the three populations. a phenogram constructed on the basis of the most representative electrophoretic banding patterns allowed the specimens tested to be divided into two groups. the ba and sc populations could be completely separated while some individuals from mg could be ... | 1999 | 9924964 |
| interpopulation variability among panstrongylus megistus (hemiptera: reduviidae) from brazil. | comparisons were made among panstrongylus megistus (burmeister) from three areas of brazil (bahia, minas gerais, and santa catarina), where populations differ with regard to their degree of association with human dwellings. the following characters were studied: morphology of the eggs and the male genitalia; morphometry of the head and thorax; isoenzyme profile; enzymatic activity of the alpha-glycerophosphate dehydrogenase (alpha-gpdh); and cytogenetics. in general, differences were observed in ... | 2003 | 14680104 |
| biogeography of brazilian populations of panstrongylus megistus (hemiptera, reduviidae, triatominae) based on molecular marker and paleo-vegetational data. | in epidemiological terms, panstrongylus megistus is one of the most important species of triatomine bug in brazil. samples from 11 localities were studied using the random amplification of polymorphic dna (rapd) technique, which was able to differentiate the study populations clearly. biogeographical data indicate that these populations could already have arisen 18,000 years ago (c(14)), it being possible to differentiate insects from the brazilian states of santa catarina (sc) in the south, cea ... | 2006 | 17055993 |