| epidemiology of chagas disease in jaguaruana, ceará, brazil. i. presence of triatomines and index of trypanosoma cruzi infection in four localities of a rural area. | in order to assay the triatomine infestation and domiciliation in the rural area of jaguaruana district, state of ceará, brazil, we studied, from november 2000 to april 2002, 4 localities comprising 158 domiciles as a whole, with an average of 4 inhabitants/house, who are dwelling in there for more than 7 years. most houses have tile-covered roofs and the walls built with plaster-covered bricks (57%), followed by bricks without plaster (33%), and mud walls (7.5%). a total of 3082 triatomines wer ... | 2004 | 15273797 |
| aspects of peridomiciliary ecotopes in rural areas of northeastern brazil associated to triatomine (hemiptera, reduviidae) infestation, vectors of chagas disease. | artificial ecotopes of 121 peridomiciliary environments in four rural localities in the state of ceará, brazil, were studied and the type of material of the ecotopes was identified as triatomine infestation. two thousand two hundred and four triatoma brasiliensis neiva, 340 triatoma pseudomaculata corrêa and espínola, 121 rhodnius nasutus stall, and 5 panstrongylus lutzi (neiva and pinto) were captured. out of the 323 ecotopes found (x = 2.0 +/- 1.8 per dwelling) - such as pigpens, henhouses, co ... | 2006 | 16830706 |
| first report on the occurrence of trypanosoma rangeli tejera, 1920 in the state of ceará, brazil, in naturally infected triatomine rhodnius nasutus stål, 1859 (hemiptera, reduviidae, triatominae). | the aim of this work was to identify and report the occurrence of trypanosoma rangeli and trypanosoma cruzi in naturally infected rhodnius nasutus (hemiptera, reduviidae, triatominae) in the state of ceará, brazil. triatomines feces, salivary glands, and hemolymph were collected for fresh examination, and specific detection of t. rangeli and t. cruzi dna by polymerase chain reaction was carried out. the specific characterization of these two parasites showed the simultaneous presence of both par ... | 2007 | 17710312 |
| feeding and defecation patterns of rhodnius nasutus (hemiptera; reduviidae), a triatomine native to an area endemic for chagas disease in the state of ceará, brazil. | the importance of rhodnius nasutus in the transmission of chagas disease in northeastern brazil was investigated regarding feeding and defecation patterns of this triatomine under laboratory conditions. an average of 30 samples were studied for each instar, from fourth-instar nymphs onward. on average, 86.4% started feeding after less than 10 minutes. in terms of the duration of feeding, 53.3% of fourth instar nymphs, 81.9% of fifth-instar nymphs, 21.9% of males, and 36.7% of females fed for mor ... | 2009 | 19815881 |
| ecological aspects of rhodnius nasutus stål, 1859 (hemiptera: reduviidae: triatominae) in palms of the chapada do araripe in ceará, brazil. | the aim of this work is to present aspects related to the ecology of rhodnius nasutus stål, 1859 in palms from chapada do araripe in ceará, brazil. the following five species of palms were investigated: babaçu (attalea speciosa), buriti (mauritia flexuosa), carnaúba (copernicia prunifera), catolé (syagrus oleracea) and macaúba-barriguda (acrocomia intumescens). fifth palms were dissected (10 specimens for each species). the overall infestation index was 86%, with a total of 521 triatomines colle ... | 2008 | 19148424 |
| genetic polymorphism in trypanosoma cruzi i isolated from brazilian northeast triatomines revealed by low-stringency single specific primer-polymerase chain reaction. | different molecular markers have been employed for typing trypanosoma cruzi strains from endemic areas of chagas disease. the low-stringency single specific primer-polymerase chain reaction (lssp-pcr) has been a sensitive and informative technique that uses the variable region of kinetoplast dna minicircles as a genetic marker, allowing detection of dna sequence variation. in the present study, we analyzed the intra-lineage genetic variability of the t. cruzi strains obtained from triatomine fec ... | 2008 | 18633644 |
| is rhodnius nasutus (hemiptera; reduviidae) changing its habitat as a consequence of human activity? | rhodnius nasutus, a triatomine species autochthonous in the brazilian northeast, is primarily associated with the copernicia prunifera palm tree (carnauba). for the first time, the colonization of this triatomine in another tree species is reported. to investigate the existence of an infected triatomine focus located in a periurban area of the county of jaguaruana, ceará, situated in the brazilian northeast, where soil is greatly altered and natural vegetation scarce, an entomological survey was ... | 2008 | 18095000 |