| entomological survey in the state of piauí, northeastern brazil, reveals intradomiciliary colonization of triatoma brasiliensis macromelasoma. | this survey aimed to assess the presence of triatomine vectors of chagas disease within the rural communities of são joão do piauí, northeast brazil. intradomiciliary and peridomiciliary collection strategies were implemented wherein 279 specimens of triatoma brasiliensis macromelasoma, both nymph and adult were found in 15 (50%) of the studied homes. of the intradomiciliary insects, 73 (67.6%) were identified as nymph instars (1st instar [n1]= 6, n2= 14, n3= 28, n4= 7 and n5= 18). in the studie ... | 2017 | 28591255 |
| mitochondrial pcr-rflp assay to distinguish triatoma brasiliensis macromelasoma from triatoma brasiliensis brasiliensis subspecies (hemiptera: reduviidae). | triatoma brasiliensis sensu lato (s.l.), the main vector of chagas disease in northeastern brazil, is a species complex comprising four species, one with two subspecies (t. brasiliensis brasiliensis, t. brasiliensis macromelasoma, t. juazeirensis, t. sherlocki, and t. melanica), and each taxon displaying distinct ecological requirements. in order to evaluate the genetic relationships among nine t. brasiliensis s.l. populations from northeastern brazil, we analyzed their mitochondrial cytochrome ... | 2013 | 24454408 |
| revalidation and redescription of triatoma brasiliensis macromelasoma galvão, 1956 and an identification key for the triatoma brasiliensis complex (hemiptera: reduviidae: triatominae). | triatoma brasiliensis macromelasoma is revalidated based on the results of previous multidisciplinary studies on the triatoma brasiliensis complex, consisting of crossing experiments and morphological, biological, ecological and molecular analyses. these taxonomic tools showed the closest relationship between t. b. macromelasoma and triatoma brasiliensis brasiliensis. t. b. macromelasoma is redescribed based on specimens collected in the type locality and specimens from a f1 colony. the complex ... | 2013 | 24037202 |
| are members of the triatoma brasiliensis (hemiptera, reduviidae) species complex able to alter the biology and virulence of a trypanosoma cruzi strain? | trypanosoma cruzi is the causative agent of chagas disease, transmitted to humans and mammals by blood-sucking hemipteran insects belonging to the triatominae subfamily. the two main genotypes of t. cruzi (tci and tcii) differ in many characteristics concerning their genetic profile. despite the extensive literature on vectors and the etiologic agent, several interactive aspects between these two elements of chagas disease are still waiting to be further clarified. here, biological and histologi ... | 2015 | 26013138 |
| phenotypic variability confirmed by nuclear ribosomal dna suggests a possible natural hybrid zone of triatoma brasiliensis species complex. | triatoma brasiliensis macromelasoma occurs in pernambuco state, brazil, which is situated between the distribution areas of triatoma brasiliensis brasiliensis (north) and triatoma juazeirensis (south). t. b. macromelasoma displays greater variations in its chromatic phenotype than either t. b. brasiliensis or t. juazeirensis, and patterns reminiscent of one or the other. experimental crosses from each of these members of the t. brasiliensis species complex generated fertile offspring suggesting ... | 2016 | 26520796 |
| sperm dimorphism in the triatoma brasiliensis species complex and its applications. | morphological and structural features of the sperm of the triatoma brasiliensis neiva, 1911 (hemiptera: reduviidae) species complex were examined in this first study investigating the sperm of heteroptera and the genus triatoma. males were dissected and their seminal vesicles removed. for measurement, seminal vesicles were squashed on glass slides, spread, fixed and observed under a photomicroscope. the images were analysed and measures of sperm were made. data were analysed using one-way analys ... | 2017 | 28117911 |