melanica to the specific taxonomic status. The chromatic variation combined with genetic information resulted in raising T. The Brasiliensis subcomplex was proposed by Schofield & GalvГЈo based on the ecological data, geographical distribution and morphology, which included T.

This led Costa and colleagues to conduct a set of investigations based on biology, ecology, phylogeny, experimental crossings among others. brasiliensis ( s.l.) exhibited numerous chromatic forms and emphasized it should be better investigated. Lent & Wygodzinsky observed that across its distribution, T. brasiliensis is divided into two subspecies: T. sherlocki Papa, Jurberg, Carcavallo, Cerqueira & Barata, 2002 in which T. brasiliensis species complex is based on a group of monophyletic taxa that occur in rocky outcrops of the semiarid region of the Brazilian Northeast, including seven species: T. brasiliensis is the most frequently Chagas disease vector collected in human domiciles and is considered the most important triatomine species in the region. brasiliensis is associated with mammals, which are potential parasite reservoirs. pseudomaculata is more associated with birds (refractory to T. pseudomaculata, native triatomines of difficult control and widespread in the semiarid Northeast. The Brazilian Northeast, one of the poorest and underdeveloped regions of the country, raises concern in the context of Chagas disease transmission because it is an area of infestation by T. pseudomaculata CorrГЄa & EspГnola, 1964 and T.

More than 65 species of triatomines have been recorded in Brazil, but few exhibit synanthropic behaviors, such as Triatoma infestans, Panstrongylus megistus (Burmeister, 1835), T. Although the diseaseвЂ™s incidence has declined in recent decades due to intense programs to combat the main domiciliated vectors, it is estimated that six to eight million people are still infected worldwide. These insect vectors may transmit the disease when they are infected with the parasite Trypanosoma cruzi (Chagas, 1909) (Kinetoplastida: Trypanosomatidae), the etiological agent of the illness. The transmission classically occurs via vector insects of the subfamily Triatominae (Hemiptera: Heteroptera: Reduviidae). On the other hand, the pattern of morphometric results in micro-geographic scales showed well-defined groups, highlighting the potential of this tool to inferences on the source for infestation.Д¬hagas disease is among the most important neglected diseases in Latin American countries. brasiliensis carries in its genotype a source of information to allow the phenotypical plasticity across its whole distribution for shaping populations, which may have caused a lack of population delimitation for CVAs in morphometric analysis for macro-geographic scale analysis. The factorial graphics built with the CVA evidenced population delimitation for the morphometric data at micro-geographic scales. Mantel tests comparing geographic, morphometric and genetic matrices showed low correlation (all R 2 < 0.35). Little structure was observed for both markers for macro-geographic scales. The results of comparisons generated MD and О¦ ST dendrograms, and graphics of canonical variate analysis (CVA). Mahalanobis distance (MD) and coefficient of molecular differentiation (О¦ ST) were calculated among all pairs of populations. The geometric morphometry was carried out with 13 landmarks on the right wings ( n = 698) and the genetic structure was assessed by sequencing a region of cytochrome b mitochondrial gene ( n = 221). brasiliensis from distinct ecotypic and geographic sites in the states Rio Grande do Norte (RN) and ParaГba (PB). Additionally, we aimed to address the resolution of both markers for delimiting populations in distinct scales. brasiliensis populations at the ecotypic, micro and macro-geographic scales by combining morphometrics and molecular results.

In this study, we analyzed microevolutionary and demographic aspects of T. The protozoan Trypanosoma cruzi circulates in semiarid areas of northeastern Brazil in distinct ecotopes (sylvatic, peridomestic and domestic) where Triatoma brasiliensis Neiva, 1911 is the most important Chagas disease vector.

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