| acute chagas' cardiopathy in a polar bear (ursus maritimus) in guadalajara, mexico. | we report a 24-year-old female polar bear (ursus maritimus) who contracted chagas' infection at the guadalajara zoo, in jalisco, méxico, and died of acute chagas' carditis 15 days later. the histopathological findings are described, as well as the presence of triatomids (triatoma longipennis usinger) infected with trypanosoma cruzi collected within 5 meters from the place where the animal lived in the city of guadalajara. | 1997 | 9219444 |
| role of two triatoma (hemiptera: reduviidae: triatominae) species in the transmission of trypanosoma cruzi (kinetoplastida: trypanosomatidae) to man in the west coast of mexico. | from august 1997 to august 1998, 334 specimens of triatoma longipennis and 62 of t. picturata were collected in four groups of localities placed in the zone from guadalajara, jalisco to tepic, nayarit, in the west coast of mexico. most t. longipennis were collected outdoors (69.2%) while most t. picturata (58.1%) were collected indoors. all collected specimens were examined for trypanosoma cruzi infection, which was detected on 98 (29.3%) t. longipennis and 17 (27.4%) t. picturata. this study co ... | 2001 | 11285487 |
| sylvatic triatominae of the phyllosoma complex (hemiptera: reduviidae) around the community of carrillo puerto, nayarit, mexico. | research on domestic and sylvatic triatomines within the community of carrillo puerto and neighboring areas of nayarit, mexico, documented that triatoma longipennis (usinger) and triatoma picturata (usinger) were infected with trypanosoma cruzi (l.) in both habitats. t. picturata was the predominant species in both habitats. mouse baited-traps increased the effectiveness of collecting sylvatic triatomines, which were difficult to sample by inspecting habitats such as burrows, caves, and cliffs. ... | 2001 | 11580035 |
| preliminary results of random amplification of polymorphic dna among triatominae of the phyllosoma complex (hemiptera, reduviidae). | in mexico, triatoma longipennis (usinger), triatoma picturata (usinger), and triatoma pallidipennis (stal), primary chagas disease vector species of the phyllosoma complex, were analyzed by randomly amplified polymorphic dna (rapd). sixteen decametric primers resolved individual profiles not identical, but partially discriminative between species. analysis based on pairwise presence/absence comparisons between the three species was performed using three primers and two outgroup species triatoma ... | 2003 | 15049086 |
| feeding patterns of triatoma longipennis usinger (hemiptera, reduviidae) in peridomestic habitats of a rural community in jalisco state, mexico. | we analyzed triatomine blood feeding patterns to evaluate the role of peridomiciles in trypanosoma cruzi transmission at the rural village of tepehuaje de morelos at jalisco state, mexico (1999). a total of 206 bugs were collected in 11 out of 26 households (42.3%). nymphs predominated in the collections (64.9% of the total). except for one triatoma barberi female, a species that belongs to the protracta species complex, all adults were triatoma longipennis, a species of the phyllosoma complex. ... | 2004 | 15605639 |
| molecular taxonomic study of chagas disease vectors from the phyllosoma, lecticularia, and rubrofasciata complexes. | the triatiominae (hemiptera: reduviidae) are hematophagous hemipters of importance because they transmit trypanosoma cruzi, the causal agent of chagas disease. the aim of this study was to define the possible relationships between species of the phyllosoma complex (triatoma mazzottii, triatoma pallidipennis, and triatoma longipennis) and species of other complexes present in mexico that have not been previously analyzed (triatoma lecticularia and triatoma rubida). in addition, it was determined ... | 2005 | 16103598 |
| fine-scale predictions of distributions of chagas disease vectors in the state of guanajuato, mexico. | one of the most daunting challenges for chagas disease surveillance and control in mexico is the lack of community level data on vector distributions. although many states now have assembled representative domestic triatomine collections, only two triatomine specimens had been collected and reported previously from the state of guanajuato. field personnel from the state's secretaría de salud conducted health promotion activities in 43 of the 46 counties in the state and received donations of a t ... | 2005 | 16465750 |
| peridomicilary habitat and risk factors for triatoma infestation in a rural community of the mexican occident. | an examination of peridomestic area organization and triatomine collection in an endemic village for chagas disease (jalisco state) identified the habitat of triatoma longipennis (dominant species) and the risk factors of peridomestic infestation. in 100 visited peridomestic areas, 369 structures (permanent, temporary, and natural) were submitted to active manual research of triatomines. storage shelters had a higher infestation of t. longipennis than piles of brick and tile; baked clay material ... | 2007 | 17360876 |
| peridomestic colonization of triatoma longipennis (hemiptera, reduviidae) and triatoma barberi (hemiptera, reduviidae) in a rural community with active transmission of trypanosoma cruzi in jalisco state, mexico. | infestation of peridomiciles is likely a major risk factor for chagas disease transmission in jalisco state, mexico. an entomological and serological survey of a typical village was conducted between july and september 2003. the peridomestic areas of 100 dwellings were visited and triatomines were searched manually in 369 potential sites. a total of 1821 triatoma longipennis (93.2%) or triatoma barberi was captured. both species frequently occurred in sympatry. the infestation index was 60% for ... | 2007 | 17382891 |
| wild ecotopes and food habits of triatoma longipennis infected by trypanosoma cruzi lineages i and ii in mexico. | the control of wild triatomine populations that can invade dwellings is a major challenge for chagas disease control in mexico, but a better knowledge of the biology of these populations is required to develop appropriate control methods. we describe a new terrestrial ecotope of triatoma longipennis, a principal vector in the occidental part of mexico, in addition to its previously identified niche in rock pile boundary walls. analysis of feeding hosts in the two ecotopes showed that this specie ... | 2009 | 19478263 |
| natural crossbreeding between sympatric species of the phyllosoma complex (insecta: hemiptera: reduviidae) indicate the existence of only one species with morphologic and genetic variations. | the nucleotide sequences of the cytochrome b gene and the antennal phenotypes were analyzed for the following triatomine species: triatoma longipennis, triatoma pallidipennis, and triatoma picturata, which belong to the phyllosoma complex. these species inhabit sympatric areas from talpa de allende, autlan de navarro, and teocuitatlan de corona in jalisco, mexico. molecular marker analysis showed that the sympatric individuals are the natural crossbred descendents of different individuals living ... | 2010 | 20064999 |
| atlas of mexican triatominae (reduviidae: hemiptera) and vector transmission of chagas disease. | chagas disease is one of the most important yet neglected parasitic diseases in mexico and is transmitted by triatominae. nineteen of the 31 mexican triatomine species have been consistently found to invade human houses and all have been found to be naturally infected with trypanosoma cruzi. the present paper aims to produce a state-of-knowledge atlas of mexican triatomines and analyse their geographic associations with t. cruzi, human demographics and landscape modification. ecological niche mo ... | 2015 | 25993505 |
| [prevalence of triatomines (hemíptera: reduviidae: triatominae) infected by trypanosoma cruzi: seasonality and distribution in the ciénega region of the state of jalisco, mexico]. | the physical and geographical characteristics of the ciénega region, jalisco, mexico make it suitable for transmission of trypanosoma cruzi, the causative agent for chagas disease. this study characterizes the prevalence of triatomines infected by this parasite, their seasonality and their distribution in this region. a total of 328 triatomines were evaluated between january 2005 and june 2007, from 13 municipalities in the region. april, may and june were the months with the highest capture lev ... | 2008 | 18719805 |
| epidemiological risk for trypanosoma cruzi transmission by species of phyllosoma complex in the occidental part of mexico. | domestic and peridomestic triatomine populations were collected in three rural mexican communities of jalisco, nayarit and zacatecas states. triatoma longipennis and t. picturata (phyllosoma complex) were the principal species unequally distributed in the villages: t. longipennis was the main species in two communities and t. picturata in the third one. peridomestic infestation and colonization indexes were remarkably high ranging from 26.1% to 50% and from 58.3% to 85.7%, respectively. moreover ... | 2006 | 16478619 |
| identification in triatomine vectors of feeding sources and trypanosoma cruzi variants by heteroduplex assay and a multiplex miniexon polymerase chain reaction. | feeding sources of triatomine vectors (triatoma longipennis) collected in peridomiciles in mexico were identified by a heteroduplex assay developed with triatomine blood meals. trypanosoma cruzi parasites were also characterized in the same blood meal samples by multiplex-polymerase chain reaction assay of mini-exon gene inter-genic regions. the main blood meal source was from rats, but the bugs were able to feed on a wide variety of hosts, and human blood meals were identified. trypanosoma cruz ... | 2006 | 16474087 |