| incidence of trypanosoma cruzi infection in two guatemalan communities. | the prevalence of human infection by trypanosoma cruzi was assessed using an enzyme-linked immunosorbent assay (elisa) in a serological survey in 1998 of 2 rural communities (smh and ps) in guatemala. in smh (department of zacapa), where rhodnius prolixus was the principal vector, the seroprevalence amongst 373 people tested was 38.8%. in ps (department of santa rosa), where the main vector was triatoma dimidiata, 8.9% of the 428 people tested were seropositive. the overall prevalence of seropos ... | 2002 | 11925991 |
| geographical characterization of the triatomine infestations in north-central guatemala. | in an entomological study in 2002, the degree of domestic and peridomestic infestation with triatomine bugs and the geographical distribution of such infestations were investigated in north-central guatemala. the survey team searched for triatomines in houses constructed with mud walls or thatched roofs, in villages suspected of being infested. the level of infestation observed was lower than that seen in the same area and in eastern guatemala, in a preliminary survey, 3 years earlier. most of t ... | 2005 | 15829138 |
| utility of the polymerase chain reaction in detection of trypanosoma cruzi in guatemalan chagas' disease vectors. | for effective control programs, accurate assessment of trypanosoma cruzi infection in vectors is essential and has traditionally been performed by microscopic examination. for particular vectors and not others, polymerase chain reaction (pcr) analysis of fecal samples recently has been shown to be an effective means of detection. the sensitivities of the pcr and microscopy for detection of t. cruzi in different anatomic sites were compared in the two major vectors of guatemala, triatoma dimidiat ... | 1999 | 10344645 |
| environmental determinants of the distribution of chagas disease vectors in south-eastern guatemala. | the associations between the presence of triatomines and environmental variables were studied using correlation analysis and logistic regression models for a sample of villages in the south-eastern provinces of guatemala. information on the presence of triatoma dimidiata, t. nitida and rhodnius prolixus came from entomological surveys carried out by the ministry of health of guatemala as part of its vector control programme. environmental information for each village was extracted from digital t ... | 2007 | 18686245 |
| the chagas vector, triatoma dimidiata (hemiptera: reduviidae), is panmictic within and among adjacent villages in guatemala. | trypanosoma cruzi, the hemoflagellate parasite and cause of chagas disease in latin america, is carried by triatomine vectors, principally triatoma dimidiata and rhodnius prolixus in central america. to assist control efforts and to understand the epidemiology of the disease in guatemala, the population genetics of t. dimidiata was analyzed among three houses within a village and two adjacent villages in guatemala. eleven randomly amplified polymorphic dna-polymerase chain reaction (rapd-pcr) pr ... | 2003 | 14680107 |
| epidemiology of chagas disease in guatemala: infection rate of triatoma dimidiata, triatoma nitida and rhodnius prolixus (hemiptera, reduviidae) with trypanosoma cruzi and trypanosoma rangeli (kinetoplastida, trypanosomatidae). | a five-year domiciliary collection in the 22 departments of guatemala showed that out of 4,128 triatomines collected, 1,675 were triatoma dimidiata (latreille, 1811), 2,344 were rhodnius prolixus stal 1859, and only 109 were t. nitida usinger 1939. the chagas disease parasite, trypanosoma cruzi, was found in all three species. their natural infection rates were similar in the first two species (20.6%; 19.1%) and slightly lower in t. nitida(13.8%). however there was no significant difference in t ... | 2003 | 12886407 |
| impact of residual spraying on rhodnius prolixus and triatoma dimidiata in the department of zacapa in guatemala. | as a vector control program to control chagas disease in guatemala, residual spraying of rhodnius prolixus and triatoma dimidiata was performed, and its impact was measured in the department of zacapa. in order to identify infested villages and determine the degree of infestation, a baseline entomological survey to identify municipalities infested with vectors followed by an additional vector survey in areas known to be infested was conducted. residual spraying using pyrethroid insecticides was ... | 2003 | 12764447 |
| geographic distribution and morphometric differentiation of triatoma nitida usinger 1939 (hemiptera: reduviidae: triatominae) in guatemala. | triatoma nitida was found in 14 (0.4%) out of 3,726 houses located in six departments across guatemala, which were surveyed from 1994 to 1998 by the man-hour collection method. compared to previous information, the distribution of t. nitida in guatemala has increased from five to nine departments; the species is present in mild climates at altitudes from 960 to 1,500 m. fourteen percent of the intradomestic t. nitida were infected with trypanosoma cruzi. the species was often found in conjunctio ... | 2003 | 12700860 |