| ecotopes, natural infection and trophic resources of triatoma brasiliensis (hemiptera, reduviidae, triatominae). | triatoma brasiliensis is considered as one of the most important chagas disease vectors in the northeastern brazil. this species presents chromatic variations which led to descriptions of subspecies, synonymized by lent and wygodzinsky (1979). in order to broaden bionomic knowledge of these distinct colour patterns of t. brasiliensis, captures were performed at different sites, where the chromatic patterns were described: caicó, rio grande do norte (t. brasiliensis brasiliensis neiva, 1911), it ... | 1998 | 9698835 |
| feeding behavior of triatoma vitticeps (reduviidae: triatominae) in the state of minas gerais, brazil. | the objective of this study was to evaluate the feeding behavior of triatoma vitticeps through the identification of its food sources and the characterization of the blood ingestion process. in addition, we aimed to verify if the saliva of this vector interferes with the perception of the host during the feedings by creating a nervous impulse. here, we demonstrated that the t. vitticeps saliva reduces, gradually and irreversibly, the amplitude of the compound action potential of the nervous fibr ... | 2011 | 21340350 |
| [analysis on the food source of panstrongylus megistus (hemiptera, reduviidae, triatominae) and its present importance as a vector for trypanosoma cruzi, in the state of minas gerais]. | investigation of the food source of triatomines helps in understanding the biology of these insects, and also helps to infer their importance in transmitting trypanosoma cruzi to humans. | 2010 | 20464139 |
| head morphometry and isoenzymatic profile of two triatoma infestans klůg, 1834 (hemiptera, reduviidae) populations. | the triatomine bug triatoma infestans was probably originated in bolivia and dispersed passively over large areas of south america, where it is the major vector of trypanosoma cruzi. in its probable origin area this species shows two different patterns of behaviour, being found both in sylvatic and human related habitats. such behaviour is not observed in other areas of its distribution, where it is exclusive to human related habitats. the main objective of the present study was to evaluate head ... | 2011 | 19653989 |
| biogeography of brazilian populations of panstrongylus megistus (hemiptera, reduviidae, triatominae) based on molecular marker and paleo-vegetational data. | in epidemiological terms, panstrongylus megistus is one of the most important species of triatomine bug in brazil. samples from 11 localities were studied using the random amplification of polymorphic dna (rapd) technique, which was able to differentiate the study populations clearly. biogeographical data indicate that these populations could already have arisen 18,000 years ago (c(14)), it being possible to differentiate insects from the brazilian states of santa catarina (sc) in the south, cea ... | 2006 | 17055993 |
| interpopulation variability among panstrongylus megistus (hemiptera: reduviidae) from brazil. | comparisons were made among panstrongylus megistus (burmeister) from three areas of brazil (bahia, minas gerais, and santa catarina), where populations differ with regard to their degree of association with human dwellings. the following characters were studied: morphology of the eggs and the male genitalia; morphometry of the head and thorax; isoenzyme profile; enzymatic activity of the alpha-glycerophosphate dehydrogenase (alpha-gpdh); and cytogenetics. in general, differences were observed in ... | 2003 | 14680104 |
| isoenzymes detect variation in populations of triatoma brasiliensis (hemiptera: reduviidae: triatominae). | triatoma brasiliensis is one of the most important vectors of chagas disease in the semiarid zone of the northeast of brazil. intraspecific morphological and behavioural variation has been reported for different populations. results for four distinct populations using eight isoenzymes are reported here. the literature describes three subspecies: t. brasiliensis brasiliensis neiva, 1911; t. brasiliensis melanica neiva & lent, 1941 and t. brasiliensis macromelasoma galvão, 1956. these subspecies d ... | 1997 | 9361737 |
| misidentification of two brazilian triatomes, triatoma arthurneivai and triatoma wygodzinskyi, revealed by geometric morphometrics. | triatoma arthurneivai lent & martins and triatoma wygodzinskyi lent (hemiptera: reduviidae) are two brazilian species found in the sylvatic environment. several authors may have misidentified t. arthurneivai and consequently published erroneous information. this work reports the use of geometric morphometric analysis on wings in order to differentiate t. arthurneivai and t. wygodzinskyi, and thus to detect possible misidentifications. triatomines collected from the field in the states of minas g ... | 2010 | 21039685 |
| differences in saliva composition among three brazilian populations of panstrongylus megistus (hemiptera, reduviidae). | comparisons of electrophoretic profiles of triatomines (panstrongylus megistus) from the brazilian states of bahia (ba), minas gerais (mg) and santa catarina (sc) revealed differences in the composition of the saliva between the three populations. a phenogram constructed on the basis of the most representative electrophoretic banding patterns allowed the specimens tested to be divided into two groups. the ba and sc populations could be completely separated while some individuals from mg could be ... | 1999 | 9924964 |