| [first report on neotoma micropus (rodentia) as a reservoir of trypanosoma cruzi in mexico]. | using xenodiagnosis, two (8.0%) of 25 woodrats neotoma micropus were found infected with tripanosome parasite in vaquerias, a village in nuevo leon state, mexico. the triatomine species developing infective metacyclic trypanosomes at week 12th were triatoma pallidipennis, t. infestans and t. gerstaeckeri. experimental infections using infected dejections were successfully conducted on laboratory mice (cd1 strain) confirming the vertebrate cycle of trypanosome cruzi. the biological characterizati ... | 1992 | 1306997 |
| frequency of triatomines infected with trypanosoma cruzi collected in cuernavaca city, morelos, méxico. | in order to study the frequency of infection with trypanosoma cruzi in the triatomines from cuernavaca city (morelos, mexico), 1,060 triatomines were captured with the support of the population, from september 1990 to february 1992; 1,035 were triatoma pallidipennis adults, 88% presented flagellated protozoa with morphological characteristics corresponding to trypanosoma spp. later, in the laboratory, their ability to infect nih mouse confirmed the isolates identities as trypanosoma cruzi. the o ... | 1996 | 8986111 |
| importance of triatoma pallidipennis (hemiptera: reduviidae) as a vector of trypanosoma cruzi (kinetoplastida: trypanosomatidae) in the state of morelos, mexico, and possible ecotopes. | we performed a transversal-type epidemiological study in the state of morelos, mexico, to determine the presence of triatomines, their ecotopes, and importance in transmission of trypanosoma cruzi chagas. sampling sites included domestic, peridomestic, and wild areas with collection based on the person per hour technique. we determined the entomological indices related to infestation, density, overcrowding, colonization, infection, and dispersion, which were used to calculate transmission risk. ... | 1999 | 10337089 |
| [natural trypanosoma cruzi infection of triatominae bugs associated with human habitations in mexico ]. | to estimate the prevalence of infection with trypanosoma cruzi in triatominae species frequently found in and around mexican dwellings, and to assess the frequency of triatominae in towns by state. | 2000 | 11201577 |
| sylvatic focus of american trypanosomiasis in the state of morelos, mexico. | wild vectors and reservoir hosts of trypanosoma cruzi were surveyed from february 1993 to june 1994 in ticumán (18 degrees 46'n, 99 degrees 07'w), mexico (deciduous tropical forest). direct faeces examination showed that 87% of triatoma pallidipennis hosted the parasite; t. cruzi forms were present in cultures inoculated with faeces of fifty 67% triatomine bugs and thirty cd-1 strain mice (10 d old) inoculated (peritoneum) with faeces of positive insects t. cruzi amastigotes were found in heart ... | 2001 | 11935921 |
| [description of chagas disease in the valle de iguala, guerrero state, mexico- marco]. | there are reports regarding the presence of triatomine vectors of trypanosoma cruzi, the causal agent of chagas' disease, and infected individuals on the coast and zones south of the state of guerrero, mexico. nonetheless, there are no completed reports in the valley of iguala. to know with greater precision endemic zones, seropositive individuals and their health condition, t. cruzi-infected triatomines and characteristics of dwellings were studied. seroprevalence was 1.8% by indirect elisa and ... | 2003 | 14723049 |
| efficacy of pyrethroid insecticides against domestic and peridomestic populations of triatoma pallidipennis and triatoma barberi (reduviidae:triatominae) vectors of chagas' disease in mexico. | a single village control trial for triatoma pallidipennis and t. barberi was conducted using three synthetic pyrethroids (bifenthrin, cyfluthrin, and deltamethrin), evaluated as residual treatments in separate sectors, with complete coverage indoors and in peridomiciliary areas. spray intervention was preceded by a preintervention entomological evaluation and household survey, followed by four postintervention evaluations at 1, 3, 6, and 12 mo of > 96% of houses. overall preintervention adjusted ... | 2003 | 14765670 |
| preliminary results of random amplification of polymorphic dna among triatominae of the phyllosoma complex (hemiptera, reduviidae). | in mexico, triatoma longipennis (usinger), triatoma picturata (usinger), and triatoma pallidipennis (stal), primary chagas disease vector species of the phyllosoma complex, were analyzed by randomly amplified polymorphic dna (rapd). sixteen decametric primers resolved individual profiles not identical, but partially discriminative between species. analysis based on pairwise presence/absence comparisons between the three species was performed using three primers and two outgroup species triatoma ... | 2003 | 15049086 |
| evaluation of risk factors for rural infestation by triatoma pallidipennis (hemiptera: triatominae), a mexican vector of chagas disease. | control of chagas disease requires control of its triatomine vectors, which requires an understanding of the determinants of infestation. twenty-seven household environmental characteristics in the town of chalcatzingo, morelos, were analyzed for association with infestation by triatoma pallidipennis, the predominant local vector. data were obtained through timed household searches for triatomines and surveys that characterized intradomicile and peridomicile environments. of the households surve ... | 2004 | 15311472 |
| risk factors associated with house infestation by the chagas disease vector triatoma pallidipennis in cuernavaca metropolitan area, mexico. | chagas disease caused by infection with trypanosoma cruzi chagas (kinetoplastida: trypanosomatidae) is widespread in mexico, transmitted by various triatomine bugs (hemiptera: reduviidae). the only domestic vector in cuernavaca (population 650 000) is triatoma pallidipennis (ståhl) with t. cruzi seroprevalence ranging from 1% to 9% in the resident human population. we surveyed possible risk factors for t. pallidipennis infestation at cuernavaca (altitude 1200-2200 m) on south-western slopes of t ... | 2005 | 15958028 |
| molecular taxonomic study of chagas disease vectors from the phyllosoma, lecticularia, and rubrofasciata complexes. | the triatiominae (hemiptera: reduviidae) are hematophagous hemipters of importance because they transmit trypanosoma cruzi, the causal agent of chagas disease. the aim of this study was to define the possible relationships between species of the phyllosoma complex (triatoma mazzottii, triatoma pallidipennis, and triatoma longipennis) and species of other complexes present in mexico that have not been previously analyzed (triatoma lecticularia and triatoma rubida). in addition, it was determined ... | 2005 | 16103598 |
| fine-scale predictions of distributions of chagas disease vectors in the state of guanajuato, mexico. | one of the most daunting challenges for chagas disease surveillance and control in mexico is the lack of community level data on vector distributions. although many states now have assembled representative domestic triatomine collections, only two triatomine specimens had been collected and reported previously from the state of guanajuato. field personnel from the state's secretaría de salud conducted health promotion activities in 43 of the 46 counties in the state and received donations of a t ... | 2005 | 16465750 |
| infestation by triatoma pallidipennis (hemiptera: reduviidae: triatominae) is associated with housing characteristics in rural mexico. | long-term control of chagas disease requires not only interruption of the human transmission cycle of trypanosoma cruzi schyzotrypanum, chagas, 1909 by controlling its domestic triatomine vectors but also surveillance to prevent reinfestation of residences from sylvatic or persistent peridomestic populations. although a number of potential risk factors for infestation have been implicated in previous studies, the explanatory power of resulting models has been low. two years after cessation of tr ... | 2006 | 17162961 |
| evaluation of cultures of saccharomyces cerevisae as baits for triatoma dimidiata and triatoma pallidipennis. | we tested the attraction of triatoma dimidiata and t. pallidipennis to traps baited with yeast volatiles. two traps were simultaneously presented in opposite sides of an experimental arena. one trap presented a yeast culture in sucrose solution, while the other contained sucrose solution as control. a first experimental series was done without offering a central refuge for bugs. in a second series, one shelter where the insects could hide was offered and the traps were presented afterwards. in t ... | 2007 | 17426891 |
| effect of ectoparasitic pimeliaphilus plumifer mites (acari: pterygosomatidae) on meccus pallidipennis (hemiptera: reduviidae) and several other chagas' disease vectors under laboratory conditions. | several biological parameters were evaluated to determine the capacity of pimeliaphilus plumifer as biological control agent of triatominae bugs. when p. plumifer and bugs of a variety of triatomine species were forced together in cages in the laboratory, the incidence of mite infestation was the following: meccus pallidipennis > m. bassolsae > triatoma rubida > m. longipennis > m. picturatus, and practically no mites were found on t. infestans and rhodnius prolixus. adults and hexapod larvae of ... | 2007 | 17549587 |
| importance of species of triatominae (heteroptera: reduviidae) in risk of transmission of trypanosoma cruzi in western mexico. | the epidemiological risk of infection by trypanosoma cruzi chagas in human populations of western mexico is still under study. although most vectors in this region and their vector capability are already known, new studies estimating the risk and the importance of individual triatominae species (hemiptera: reduviidae) for t. cruzi transmission are necessary. for 1 yr, every month, > 400 human dwellings and their surroundings in eight communities of two western mexico states were searched for tri ... | 2008 | 18533443 |
| predicting geographic and ecological distributions of triatomine species in the southern mexican state of puebla using ecological niche modeling. | we analyzed the geographic distribution using ecological niche modeling of three species of triatomines distributed in the mexican state of puebla. punctual records were gathered for a period of 5 yr of fieldwork sampling. we used the genetic algorithm for rule-set production (garp) to achieve the potential distribution of the ecological niche of triatomines. the models showed that triatoma barberi and meccus pallidipennis are sympatric and widely distributed in the central-southern part of the ... | 2008 | 18533450 |
| risk factors associated with triatomines and its infection with trypanosoma cruzi in rural communities from the southern region of the state of mexico, mexico. | trypanosoma cruzi prevalence in triatomines and risk factors associated to the presence of the insect were studied in 990 rural houses in the southern region of the state of mexico, mexico. in each house, triatomines were collected, and information related to house construction material was obtained. t. cruzi infection was diagnosed in all triatomines. a primary screening was performed using 2 x 2 contingency tables of exposure variables. all variables with p <or= 0.20 were analyzed by logistic ... | 2010 | 20064995 |
| prevalence of trypanosoma cruzi in dogs (canis familiaris) and triatomines during 2008 in a sanitary region of the state of mexico, mexico. | american trypanosomiasis is a public health problem in latin america and southern parts of the united states. infection in triatomines (vector) and domestic dogs (reservoir host) is a good indicator of trypanosoma cruzi circulation and human risk of infection. the state of mexico, mexico, has been considered free of t. cruzi, and no detailed epidemiologic study has been conducted to assess the intricacies of the transmission cycle of the parasite in the region. such studies would enhance our und ... | 2011 | 20575648 |
| distribution and infection of triatomines (hemiptera: reduviidae) by trypanosoma cruzi in the state of michoac+ín, mexico. | an entomological study of triatomine species was carried out to assess their prevalence in 10 localities of the state of michoac+ín, mexico. entomological indices were calculated to estimate the risk for vector-borne transmission of trypanosoma cruzi to the human population in this area. four triatomine species (triatoma barberi, triatoma dimidiata, meccus pallidipennis and meccus longipennis) were collected from the study area. this is the first report of m. longipennis and t. dimidiata in mich ... | 2011 | 21739032 |
| ecological connectivity of trypanosoma cruzi reservoirs and triatoma pallidipennis hosts in an anthropogenic landscape with endemic chagas disease. | traditional methods for chagas disease prevention are targeted at domestic vector reduction, as well as control of transfusion and maternal-fetal transmission. population connectivity of trypanosoma cruzi-infected vectors and hosts, among sylvatic, ecotone and domestic habitats could jeopardize targeted efforts to reduce human exposure. this connectivity was evaluated in a mexican community with reports of high vector infestation, human infection, and chagas disease, surrounded by agricultural a ... | 2012 | 23049923 |
| effect of the saliva from different triatomine species on the biology and immunity of tlr-4 ligand and trypanosoma cruzi-stimulated dendritic cells. | triatomines are blood-sucking vectors of trypanosoma cruzi, the causative agent of chagas disease. during feeding, triatomines surpass the skin host response through biomolecules present in their saliva. dendritic cells (dcs) play a crucial role in the induction of the protection to aggressive agents, including blood-sucking arthropods. here, we evaluated if salivary components of triatomines from different genera evade the host immunity by modulating the biology and the function of lps- or t. c ... | 2016 | 27938380 |
| survival and immune response of the chagas vector meccus pallidipennis (hemiptera: reduviidae) against two entomopathogenic fungi, metarhizium anisopliae and isaria fumosorosea. | chagas disease is a key health problem in latin america and is caused and transmitted by trypanosoma cruzi and triatomine bugs, respectively. control of triatomines has largely relied on the use pyrethroids, which has proved to be ineffective in the long term. alternatively, the use of entomopathogenic fungi has been implemented to control triatomine bugs. these fungi are highly efficient as they induce a reduction in immune response on insects. meccus pallidipennis is the main triatomine vector ... | 2016 | 27012246 |
| lethal effects of a mexican beauveria bassiana (balsamo) strain against meccus pallidipennis (stal). | the entomopathogenic fungus beauveria bassiana (balsamo 1835) vuillemin is an effective alternative control agent against some agricultural pests and biological vectors of important diseases such as chagas disease. in this work we studied an isolate of beauveria bassiana from of the town of san antonio rayón, puebla, mexico and its entomopathogenic effects on meccus pallidipennis (stal 1872). phylogenetic analysis using molecular comparison of the its and ef1α genes, showed that the resulting cl ... | 2014 | 25242941 |
| pathological effects of blastocrithidia triatomae (trypanosomatidae) on the reduviid bugs triatoma sordida, t. pallidipennis and dipetalogaster maxima after coprophagic infection. | developmental time and mortality in nymphs of the reduviid bugs triatoma sordida (stål), triatoma pallidipennis (stål) and dipetalogaster maxima (uhler) were studied in uninfected groups and in those infected with blastocrithidia triatomae cerisola et al. (trypanosomatidae). in t.sordida and t.pallidipennis, major vectors of chagas' disease in brazil and mexico respectively, infection with b.triatomae was associated with slight developmental retardations in the final instars, and increased morta ... | 1988 | 2980188 |
| dimiconin, a novel coagulation inhibitor from the kissing bug, triatoma dimidiata, a vector of chagas disease. | sequence analysis of a triatoma dimidiata salivary gland cdna library resulted in the identification of two transcripts (td60 and td101) homologous to triabin, an inhibitor of thrombin in triatoma pallidipennis saliva. in the present study, a recombinant protein of td60, designated dimiconin, was expressed in escherichia coli and its activity was characterized. the resulting protein inhibited the intrinsic but not extrinsic blood coagulation pathway, suggesting that dimiconin is not a thrombin i ... | 2012 | 22771751 |
| comparative and functional triatomine genomics reveals reductions and expansions in insecticide resistance-related gene families. | triatomine insects are vectors of trypanosoma cruzi, a protozoan parasite that is the causative agent of chagas' disease. this is a neglected disease affecting approximately 8 million people in latin america. the existence of diverse pyrethroid resistant populations of at least two species demonstrates the potential of triatomines to develop high levels of insecticide resistance. therefore, the incorporation of strategies for resistance management is a main concern for vector control programs. t ... | 2017 | 28199333 |
| community resilience and chagas disease in a rural region of mexico. | to explore the pillars of community resilience in a region where chagas disease is endemic, with the aim of promoting participatory processes to deal with this condition from the resilience of the population. | 2016 | 27509012 |
| biological characteristics of geographically isolated populations of meccus mazzottii (hemiptera: reduviidae) in southern mexico. | chagas disease, caused by trypanosoma cruzi chagas, is one of the most epidemiologically important vector-borne zoonoses in mexico. among the 32 reported triatomine species from mexico, meccus mazzottii (usinger) (hemiptera: reduviidae) is one of the most important vectors of t. cruzi in the southern part of the country. variability among populations of triatomines has been recorded for several species (meccus longipennis (usinger) and meccus pallidipennis (stal)) that are closely related to m. ... | 2014 | 25502028 |
| development and glycoprotein composition of the perimicrovillar membrane in triatoma (meccus) pallidipennis (hemiptera: reduviidae). | hemipterans and thysanopterans (paneoptera: condylognatha) differ from other insects by having an intestinal perimicrovillar membrane (pmm) which extends from the base of the microvilli to the intestinal lumen. the development and composition of the pmm in hematophagous reduviidae depend on factors related to diet. the pmm may also allow the human parasite trypanosoma cruzi, the etiological agent of human chagas disease, to establish and develop in this insect vector. we studied the pmm developm ... | 2014 | 25043894 |
| differences on biological attributes of three populations of meccus pallidipennis stål (hemiptera: reduviidae). | meccus pallidipennis is one of the most epidemiologically important vectors of trypanosoma cruzi to reservoir hosts in nine states of mexico. triatomines occurring in distinct locations normally adapt to local conditions. the aim of this study was to examine the biological attributes of three populations of m. pallidipennis from areas with different environmental characteristics as a factor influencing the triatomine capacity for t. cruzi transmission. | 2014 | 24717198 |
| distribution of constitutive heterochromatin in species of triatomines with fragmentation of sex chromosomes x. | cytogenetic analyses of triatomines are considered to be important taxonomic tools. thus, we analyzed the pattern of constitutive heterochromatin in 7 species of triatomine with fragmentation of the sex chromosome x, focusing on the cytotaxonomy of these triatomines. the species analyzed included triatoma vitticeps, triatoma melanocephala, triatoma tibiamaculata, triatoma protracta, meccus pallidipennis, panstrongylus megistus, and panstrongylus lignarius. the seminiferous tubules of the adult m ... | 2014 | 25501239 |
| salivary gland transcripts of the kissing bug, panstrongylus chinai, a vector of chagas disease. | the saliva of hematophagous arthropods injected during blood feeding contains potent pharmacologically active components to counteract the host hemostatic and inflammatory systems. in the present study, dominant salivary gland transcripts of panstrongylus chinai, a vector of chagas disease, were analyzed by sequencing randomly selected clones of the salivary gland cdna library. this analysis showed that 56.5% of the isolated transcripts coded for putative secreted proteins, of which 73.7% coded ... | 2017 | 28690145 |
| proteomic and transcriptomic analysis of saliva components from the hematophagous reduviid triatoma pallidipennis. | species belonging to the triatominae subfamily are commonly associated with chagas disease, as they are potential vectors of the parasite trypanosoma cruzi. however, their saliva contains a cocktail of diverse anti-hemostatic proteins that prevent blood coagulation, vasodilation and platelet aggregation of blood; components with indisputable therapeutic potential. we performed a transcriptomic and proteomic analyses of salivary glands and protein spots from 2de gels of milked saliva, respectivel ... | 2017 | 28442446 |
| neuropeptidomics in triatoma infestans. comparative transcriptomic analysis among triatomines. | chagas' disease, affecting up to 6-7 million people worldwide, is transmitted to humans through the feces of triatomine kissing bugs. from these, rhodnius prolixus, triatoma dimidiata, triatoma infestans and triatoma pallidipennis are important vectors distributed throughout the latin american subcontinent. resistance to pyrethroids has been developed by some triatomine populations, especially t. infestans, obstructing their control. given their role in the regulation of physiological processes, ... | 2016 | 27993629 |
| identification of g protein coupled receptors for opsines and neurohormones in rhodnius prolixus. genomic and transcriptomic analysis. | the importance of chagas disease motivated the scientific effort to obtain the complete genomic sequence of the vector species rhodnius prolixus, this information is also relevant to the understanding of triatomine biology in general. the central nervous system is the key regulator of insect physiology and behavior. neurohormones (neuropeptides and biogenic amines) are the chemical messengers involved in the regulation and integration of neuroendocrine signals. in insects, this signaling is main ... | 2016 | 25976540 |