| mixed domestic infestation by rhodnius prolixus stal, 1859 and panstrongylus geniculatus latreille, 1811, vector incrimination, and seroprevalence for trypanosoma cruzi among inhabitants in el guamito, lara state, venezuela. | mixed infestation of nymphs and adults of rhodnius prolixus stal, 1859 and panstrongylus geniculatus latreille, 1811 was detected in 3 (15%) of 20 dwellings in el guamito, an endemic focus of chagas disease in lara state, venezuela. in one of the houses, both species were positive for trypanosoma cruzi: 14.3% (r. prolixus) and 20% (p. geniculatus ). the overall infection rate in 143 of 352 r. prolixus was 16.1%. parasites isolated from r. prolixus were identified as t. cruzi i by random amplifie ... | 2004 | 15516649 |
| [epidemiology of chagas disease in andrés eloy blanco, lara, venezuela: triatomine infestation and human seroprevalence]. | a seroepidemiological survey and vector captures were performed in four rural communities in andrés eloy blanco, lara state, venezuela. systematic random sampling was based on family clusters, with samples drawn from 869 individuals to determine anti-trypanosoma cruzi and anti-leishmania sp. antibodies by indirect immunofluorescence. positive individuals were defined as > or = 1:32 for anti-t. cruzi antibody and non-reactive to leishmania sp. antigen, revealing an antibody frequency of 6.9% (n = ... | 2007 | 17486235 |
| [an entomological and seroepidemiological study of chagas' disease in an area in central-western venezuela infested with triatoma maculata (erichson 1848)]. | this article presents a study on seroepidemiological, entomologic, and risk factors for domiciliary infestation in a circumscribed area infested with triatoma maculata in parroquia xaguas, urdaneta municipality, lara state, venezuela. one hundred and forty households, 509 persons, and 110 dogs were sampled. serum anti-trypanosoma cruzi antibodies were determined by means of elisa and maba techniques using recombinant antigens. tr. cruzi infection in the triatomines was determined by direct micro ... | 2008 | 18949234 |