| [situation of mepraia spinolai, a wild vector for chagas disease in chile, in relation to others vectors from the perspective of their feeding profile]. | three triatomine species, triatoma infestans, mepraia spinolai and mepraia gajardoi, are vectors for chagas disease in chile. | 2000 | 11349509 |
| association between antennal phenotype, wing polymorphism and sex in the genus mepraia (reduviidae: triatominae). | mepraia spinolai and mepraia gajardoi (hemiptera, reduviidae) are only found in the arid regions of northern chile. mepraia is the only genus of triatominae with marked wing polymorphism. females of both species are micropterous, males of m. spinolai may be micropterous, brachypterous or macropterous, while males of m. gajardoi are always brachypterous. because of this wing polymorphism, mepraia can be used as a model to analyze morphological adaptations related to the flying activity and evolut ... | 2006 | 16081323 |
| trypanosoma cruzi infection in the sylvatic kissing bug mepraia gajardoi from the chilean southern pacific ocean coast. | the southern pacific ocean coast has been traditionally considered a non-active transmission area for chagas disease. in this report, we show evidence of trypanosoma cruzi infection in the sylvatic kissing bug mepraia gajardoi from the northern chilean coast. | 2008 | 18177821 |
| systematics of mepraia (hemiptera-reduviidae): cytogenetic and molecular variation. | the haematophagous insects of the subfamily triatominae (hemiptera-reduviidae) have great epidemiological importance as vectors of trypanosoma cruzi, the causative agent of chagas disease. mepraia was originally described as a monotypic genus comprised of mepraia spinolai, distributed along coastal areas of northern chile (from region i to the metropolitan region). recently, some m. spinolai populations have been ranked as a new species named mepraia gajardoi. several populations along the distr ... | 2010 | 20018255 |
| trypanosoma cruzi i genotypes in different geographical regions and transmission cycles based on a microsatellite motif of the intergenic spacer of spliced-leader genes. | the intergenic region of spliced-leader (sl-ir) genes from 105 trypanosoma cruzi i (tc i) infected biological samples, culture isolates and stocks from 11 endemic countries, from argentina to the usa were characterised, allowing identification of 76 genotypes with 54 polymorphic sites from 123 aligned sequences. on the basis of the microsatellite motif proposed by herrera et al. (2007) to define four haplotypes in colombia, we could classify these genotypes into four distinct tc i sl-ir groups, ... | 2010 | 20670628 |
| a new species and karyotype variation in the bordering distribution of mepraia spinolai (porter) and mepraia gajardoi frías et al (hemiptera: reduviidae: triatominae) in chile and its parapatric model of speciation. | in the present study, the morphology, color pattern, chromosomal complement and aspects of meiosis in natural populations at the borders of the distributions of mepraia gajardoi frías et al and mepraia spinolai (porter) are described. the males of these bordering populations are brachypterous or macropterous, while females are always micropterous. morphological and cytogenetic data indicated that the populations that border the distributions of m. gajardoi and m. spinolai, belong to a different ... | 2010 | 20877994 |
| wing shape differentiation of mepraia species (hemiptera: reduviidae). | mepraia is an endemic genus found in the semiarid and arid regions of north-central chile. until 1998, mepraia spinolai was the only species of the genus, distributed in coastal and interior valleys from chile between 18° and 34°s. however, on the basis of karyotype and morphological characters, coastal desert populations between 18° and 26°s were ranked as a new species, mepraia gajardoi. recently, genetic studies using nuclear and mitochondrial markers on mepraia populations suggest that the g ... | 2010 | 21111066 |
| experimental crosses between mepraia gajardoi and m. spinolai and hybrid chromosome analyses reveal the occurrence of several isolation mechanisms. | hematophagous insects of the subfamily triatominae include several species with a large variety of shapes, behavior and distribution. they have great epidemiological importance since most of them transmit the flagellated protozoan trypanosoma cruzi, the etiologic agent of chagas disease. in this subfamily several cases of species hybridization have been reported under experimental and natural conditions. mepraia is a genus of triatominae endemic in chile, responsible for transmitting t. cruzi in ... | 2016 | 27600593 |
| corrigendum to "fluctuations in trypanosoma cruzi discrete typing unit composition in two naturally infected triatomines: mepraia gajardoi and m. spinolai after laboratory feeding" [acta trop. (2016) 9-14]. | | 2016 | 27393242 |
| fluctuations in trypanosoma cruzi discrete typing unit composition in two naturally infected triatomines: mepraia gajardoi and m. spinolai after laboratory feeding. | mepraia species are hematophagous insects and the most important wild vectors of trypanosoma cruzi, the causative agent of chagas disease in southeastern south america. because the domestic triatoma infestans is already controlled, the transmission of different t. cruzi discrete typing units (dtus) by mepraia species deserves attention. our aim is to gather information on the diversity of t. cruzi dtus circulating in natural insect populations. two groups of naturally infected bugs 21 mepraia ga ... | 2016 | 27109041 |
| interactions between trypanosoma cruzi the chagas disease parasite and naturally infected wild mepraia vectors of chile. | chagas disease, which ranks among the world's most neglected diseases, is a chronic, systemic, parasitic infection caused by the protozoan trypanosoma cruzi. mepraia species are the wild vectors of this parasite in chile. host-parasite interactions can occur at several levels, such as co-speciation and ecological host fitting, among others. thus, we are exploring the interactions between t. cruzi circulating in naturally infected mepraia species in all areas endemic of chile. we evaluated t. cru ... | 2016 | 26771702 |
| an entomological and seroepidemiological study of the vectorial-transmission risk of chagas disease in the coast of northern chile. | four species of triatomines are known from chile: triatoma infestans klug, mepraia spinolai porter, m. gajardoi frías, henry & gonzález, and m. parapatrica frías (hemiptera: reduviidae), the last three are endemic. the geographical distribution of m. gajardoi includes the coastal areas in the north of chile between 18° and 21°s, an area with both a resident workforce and summer-season visitors. a study was developed to assess the risk of vectorial transmission of chagas disease by m. gajardoi in ... | 2015 | 26208149 |
| trypanosoma cruzi infection in mepraia gajardoi and mepraia spinolai: the effect of feeding nymphs from the field. | we evaluated trypanosoma cruzi infection rates by means of minicircle dna-based polymerase chain reactions (pcrs) in 70 starved mepraia gajardoi from northern chile and 65 m. spinolai from central chile after feeding. immediately after collection in the field, 20% of m. gajardoi were found infected; after feeding, 67% of the uninfected were infected. one group of m. spinolai seemed to be completely uninfected, but after the first and second feedings, 62% and 59% were positive, respectively. | 2014 | 24935951 |
| high phylogeographic structure in sylvatic vectors of chagas disease of the genus mepraia (hemiptera: reduviidae). | the hematophagous hemiptera of the subfamily triatominae are a very diverse group with a variety of morphs, behaviors and distributions. they have great epidemiological importance because many of its members are vectors of the protozoan trypanosoma cruzi, the agent of chagas disease. mepraia is a genus of triatominae endemic to chile responsible for transmitting t. cruzi in the sylvatic cycle. mepraia includes three species, m. gajardoi (18° 30'-26° 30' s) m. spinolai (26° 30'-34° 20' s) and the ... | 2013 | 23665465 |
| trypanosoma cruzi genotypes in mepraia gajardoi from wild ecotopes in northern chile. | we evaluated trypanosoma cruzi infection in 397 wild mepraia gajardoi specimens from five coastal localities in northern chile by detection of minicircle dna by polymerase chain reaction. the wild capture sites were classified into two ecotopes: a fully wild ecotope (ecotope 1) and a wild ecotope near human dwellings (ecotope 2). infection rates varied between 11% and 27%. minicircle hybridization assays showed that t. cruzi lineages tc ii and tc vi were commonly detected in ecotope 1 and ecotop ... | 2013 | 23249691 |
| trypanosoma cruzi over the ocean: insular zones of chile with presence of infected vector mepraia species. | chagas disease is one of the main zoonosis mediated by vectors in america. the etiologic agent trypanosoma cruzi infects different mammals and is transmitted principally by the subfamily triatominae. mepraia is a genus endemic to chile, responsible for transmitting t. cruzi in the sylvatic cycle. mepraia includes three species: m. gajardoi and m. parapatrica inhabit coastal areas, while m. spinolai inhabits coastal and interior valleys. previous studies reported the occurrence of mepraia in pan ... | 2017 | 28522273 |