| chagas's disease in the amazon basin: 1. trypanosoma cruzi infections in silvatic mammals, triatomine bugs and man in the state of pará, north brazil. | a total of 1,197 wild animals from pará state north brazil, were examined for haematozoa. trypanosoma cruzi-like parasites were found in 13 different species, and were particularly common in a variety of marsupials (didelphidae), porcupines (coendou spp.), armadillos (dasypus novemcinctus) and coatimundis(nasua nasua). three human infections are reported, making a total of seven autochthonous cases of chagas's disease from pará since the first were described in 1969. a serological survey of 5,31 ... | 1979 | 112730 |
| [the epidemiology of chagas' disease in a rural area of the city of teresina, piauí, brazil]. | in the rural areas of teresina, 129 triatomines were captured distributed in (a) artificial ecotopes; a house with one triatoma brasiliensis, one panstrongylus geniculatus, rhodnius pictipes, and one rhodnius prolixus and in a uninhabited chicken house (7 rhodnius nasutus). (b) natural ecotopes; pahus orbignya martiana (41 rhodnius neglectus, 33 rhodnius prolixus and 41 rhodnius nasutus) and copernicia cerifera (3 rhodnius neglectus). the 22.6% of captured triatomines were infected by flagellate ... | 1992 | 1308066 |
| studies on vectors of trypanosoma cruzi in trinidad, west indies. | studies on vectors of trypanosoma cruzi chagas were conducted during 1982-85 as part of an investigation on the epidemiological status of american trypanosomiasis in trinidad, west indies. a total of 148 reduviid bugs were collected from caves, armadillo nests and at light traps, comprising four sylvatic species and totalling 120 panstrongylus geniculatus (latreille), two p. rufotuberculatus (champion), twelve rhodnius pictipes stal and fourteen eratyrus mucronatus stal. a significantly higher l ... | 1992 | 1421480 |
| chagas disease in ecuador: a sylvatic focus in the amazon region. | a sylvatic focus of chagas disease is reported in the amazon region of ecuador (provinces of napo and sucumbios). during 1987-1989, 10 cases of acute infection were diagnosed by direct visualization of trypanosoma cruzi in peripheral blood smears during routine malaria checks. also in that region, three triatomine bugs, rhodnius pictipes, rhodnius robustus and panstrongylus geniculatus were found naturally infected with t. cruzi suggesting that the human cases represent an autochthonous focus of ... | 1991 | 1904944 |
| urban trypanosoma (schizotrypanum) cruzi: pathology in white mice of isolates from panstrongylus geniculatus. | the histopathological alterations produced in white mice (nmri strain) by isolates of trypanosoma (schizotrypanum) cruzi from panstrongylus geniculatus captured in dwellings of the city of caracas, venezuela are reported. the heart, skeletal muscle, liver, spleen, duodenum, colon, lung, and brain were parasitized by all the isolates. all showed strong myotropism, with elevated virulence and severe histopathological alterations in the cardiac and skeletal muscle, and in the smooth muscle of the d ... | 1989 | 2517002 |
| strain identification of trypanosoma cruzi isolated from panstrongylus geniculatus in trinidad, west indies. | | 1989 | 2692229 |
| urban trypanosoma cruzi: biological characterization of isolates from panstrongylus geniculatus. | | 1988 | 3071279 |
| [wild vectors and reservoirs of "trypanosoma cruzi". xxi. ecology of panstrongylus geniculatus (latreille, 1811) (hemiptera, reduviidae)]. | | 1967 | 5620525 |
| epidemiology of trypanosoma cruzi in the oriental plains of colombia. | epidemiologic studies to define the domiciliary and extradomiciliary transmission cycles of trypanosoma cruzi and trypanosoma rangeli in the oriental plains of colombia were conducted in the gallery forests near carimagua and el porvenir. one-hundred and seven palm trees belonging to nine genera were examined; triatomines were found in only three palm species, the leaves of which are locally used for roof thatching: 2/29 maximiliana elegans, 1/7 mauritia flexuosa and 7/7 scheelea sp. bugs were a ... | 1984 | 6439062 |
| chagas' disease in the amazon basin iv. host records of trypanosoma cruzi zymodemes in the states of amazonas and rondonia, brazil. | of 151 trypanosoma cruzi stocks from 117 different individual hosts collected in the states of amazonas and rondonia, 147 from 113 hosts were identified as zymodeme 1 (z1). these included t. cruzi stocks from three marsupial species, two rodent species and three triatomine species although most were from the common opossum, didelphis marsupialis. one t. cruzi stock from rhodnius robustus was identified as z1 with a z3 pgm character, one from sciurus sp. as z3 and two from monodelphis brevicaudat ... | 1984 | 6441530 |
| epidemiological aspects of three trypanosoma cruzi zymodemes in bahia state, brazil. | culture forms of 104 stocks of trypanosoma cruzi isolated in different regions of the state of bahia were compared by electrophoresis of six enzymes. the three distinct combinations of isoenzyme patterns seen were designated zi, z2 and z3. in an area of endemic chagas's disease in eastern bahia, t. cruzi z1 was associated with sylvatic mammals and sylvatic triatomines, whereas t. cruzi z2 was associated with a separate domestic cycleof transmission. t. cruzi z1 was also found in sylvatic triatom ... | 1980 | 6776664 |
| trypanosoma (schizotrypanum) cruzi: histopathology in mice infected with strains isolated from didelphis marsupialis from the valley of caracas (venezuela). | the histopathological alterations produced in nmri strain mice by isolates of trypanosoma cruzi from didelphis marsupialis captured near human dwellings in the valley of caracas, venezuela are described. the donor opossums showed pseudocysts and amastigotes and trypomastigotes only in the heart muscle, and few areas of discrete inflammations and lysis of some muscle cells. mice were parasitized in the heart, skeletal muscle, jejunum, colon, liver, lung, urinary bladder, penis, seminal vesicle, p ... | 1996 | 9460250 |
| [wild vectors of chagas' disease in an urban area of manaus (am): flying activity during dry and rainy seasons]. | adults of rhodnius prolixus, r. pictipes and panstrongylus geniculatus found in houses in manaus have high rates of trypanosoma cruzi infection. rhodnius spp. were found throughout the year, but males of p. geniculatus were significantly more frequent in the dry season. | 1998 | 9477705 |
| chagas disease in the amazon basin: association of panstrongylus geniculatus (hemiptera: reduviidae) with domestic pigs. | just over 100 autochthonous cases of chagas disease are reported from the brazilian amazon basin. panstrongylus geniculatus (latreille) occurs throughout the region and is the known vector of trypanosoma cruzi, principal zymodeme 3 (z3) to the armadillo dasypus novemcinctus. in the small riverine community of furo do rio pau grande, pigsties adjoining houses were heavily infested with p. geniculatus, which repeatedly attacked local inhabitants. palm trees in the immediate vicinity were also infe ... | 1998 | 9538568 |
| vital statistics of panstronglus geniculatus (latreille 1811) (hemiptera: reduviidae) under experimental conditions. | a statistical evaluation of the population dynamics of panstrongylus geniculatus is based on a cohort experiment conducted under controlled laboratory conditions. animals were fed on hen every 15 days. egg incubation took 21 days; mean duration of 1st, 2nd, 3rd, 4th, and 5th instar nymphs was 25, 30, 58, 62, and 67 days, respectively; mean nymphal development time was 39 weeks and adult longevity was 72 weeks. females reproduced during 30 weeks, producing an average of 61.6 eggs for female on it ... | 1998 | 9698905 |
| epidemiology of chagas disease in ecuador. a brief review. | chagas disease is a complex public health problem that has been underestimated in ecuador. here we review the relevant published information, and present unpublished and new data that help to understand the current chagas disease epidemiological situation and its evolution in the country. three main characteristics have been identified: (i) persistence of trypanosoma cruzi transmission in already known foci; (ii) a marked endemicity in some urban areas of guayaquil; and (iii) the transformation ... | 1999 | 10677762 |
| potential for domestication of panstrongylus geniculatus (latreille, 1811) (liemiptera, reduviidae, triatominae) in the municipality of muaná, marajó island, state of pará, brazil. | | 1999 | 10677764 |
| domiciliation of the sylvatic chagas disease vector panstrongylus geniculatus latreille, 1811 (triatominae: reduviidae) in venezuela. | | 2000 | 11132377 |
| [detection of triatomines (hemiptera: reduviidae) in domiciliary and extra-domiciliary ecotopes. corrientes, argentina. ]. | in order to identify intra- and extra-domiciliary triatomines, a study in different counties of corrientes province, argentina, was conducted from 1985 to 1995. triatoma infestans (klug, 1834), triatoma sordida (stål, 1859), panstrongylus geniculatus (latreille, 1811), and panstrongylus megistus (burmeister, 1835) were detected in domestic ecotopes. t. infestans and t. sordida were also found in the peridomicile. triatoma platensis (neiva, 1913), psammolestes coreodes (bergroth, 1911), t. sordid ... | 2001 | 11514865 |
| entomological and ecological aspects of six sylvatic species of triatomines (hemiptera, reduviidae) from the collection of the national biodiversity institute of costa rica, central america. | a total of 797 specimens of wild adult triatomines, belonging to six species from the entomological collections of the costa rican national biodiversity institute, was studied from the standpoint of their relative abundance, as reflected by light traps, distribution in the country, seasonal variations and climatic and altitudinal preferences. triatoma dimidiata was the most abundant species (32.9% of the total specimens), with a very extensive distribution in different ecological zones, being mo ... | 2001 | 11562697 |
| two main clusters within trypanosoma cruzi zymodeme 3 are defined by distinct regions of the ribosomal rna cistron. | trypanosoma cruzi is currently classified into 2 major phylogenetic lineages, t. cruzi i and ii, that correlate with the formerly described zymodeme 1 and 2, respectively. another isoenzymic group (zymodeme 3-z3) was also described. in this study, we analysed the genetic diversity among z3 isolates of the brazilian amazon by restriction fragment length polymorphism of the intergenic transcribed spacers (itss) of the ribosomal rna cistron and the size of the divergent domain d7 of the 24salpha rr ... | 2002 | 11862994 |
| geometric morphometric differences between panstrongylus geniculatus from field and laboratory. | the finding of panstrongylus geniculatus nymphs inside a house in northeastern antioquia, colombia, and the reports related to their increasing presence in homes suggest the need for surveillance methods for monitoring the invasion processes. we analyzed the morphological differences between a wild population and its laboratory descendants, using the techniques of geometric morphometry, with the idea that such differences might parallel those between sylvatic and synanthropic populations. the an ... | 2002 | 12219133 |
| chromosomal evolution trends of the genus panstrongylus (hemiptera, reduviidae), vectors of chagas disease. | the genus panstrongylus includes 14 species widely distributed from mexico to argentina, some of them with great epidemiological significance as vectors of chagas disease. we study the karyotype and the male meiotic process of panstrongylus chinai, p. geniculatus, p. herreri, p. lignarius, p. megistus, p. rufotuberculatus and p. tupynambai. all species present the same sex mechanism (x(1)x(2)y in males and x(1)x(1)x(2)x(2) in females) and they also have 20 autosomes, with the exception of p. meg ... | 2002 | 12798000 |
| mixed domestic infestation by rhodnius prolixus stal, 1859 and panstrongylus geniculatus latreille, 1811, vector incrimination, and seroprevalence for trypanosoma cruzi among inhabitants in el guamito, lara state, venezuela. | mixed infestation of nymphs and adults of rhodnius prolixus stal, 1859 and panstrongylus geniculatus latreille, 1811 was detected in 3 (15%) of 20 dwellings in el guamito, an endemic focus of chagas disease in lara state, venezuela. in one of the houses, both species were positive for trypanosoma cruzi: 14.3% (r. prolixus) and 20% (p. geniculatus ). the overall infection rate in 143 of 352 r. prolixus was 16.1%. parasites isolated from r. prolixus were identified as t. cruzi i by random amplifie ... | 2004 | 15516649 |
| on the possibility of autochthonous chagas disease in roraima, amazon region, brazil, 2000-2001. | chagas disease has been almost entirely eradicated from the arid zones in central and northeastern brazil where rare or no autochthonous cases have been reported. however, in the last 10 years the disease has increasingly been registered in the amazon region. aiming to investigate the possibility of the occurrence of autochthonous cycle of chagas disease in roraima, triatomine collections, vectorial susceptibility studies (this one to be shown elsewhere), parasitological and serological analyses ... | 2005 | 15729474 |
| risk of trypanosoma cruzi i (kinetoplastida: trypanosomatidae) transmission by panstrongylus geniculatus (hemiptera: reduviidae) in caracas (metropolitan district) and neighboring states, venezuela. | the collection of panstrongylus geniculatus bugs by inhabitants of dwellings in caracas city (metropolitan district) and in the neighboring miranda and vargas sates, venezuela, allowed for the gathering of data on the potential role of this sylvatic triatomine bug as a vector of chagas disease in this area. the natural infection by trypanosoma cruzi was recorded by examining fresh and stained faeces of the bugs. additionally, a random amplification of polymorphic dna technique for parasite ident ... | 2005 | 16019006 |
| [triatomines (reduviidae: triatominae) in a chagas disease focus in talaigua nuevo (bolívar, colombia)]. | the epidemiological importance and ecological characteristics of triatomines were investigated in a chagas disease focus in talaigua nuevo, bolivar province. | 2005 | 16433183 |
| [epidemiology of chagas disease in andrés eloy blanco, lara, venezuela: triatomine infestation and human seroprevalence]. | a seroepidemiological survey and vector captures were performed in four rural communities in andrés eloy blanco, lara state, venezuela. systematic random sampling was based on family clusters, with samples drawn from 869 individuals to determine anti-trypanosoma cruzi and anti-leishmania sp. antibodies by indirect immunofluorescence. positive individuals were defined as > or = 1:32 for anti-t. cruzi antibody and non-reactive to leishmania sp. antigen, revealing an antibody frequency of 6.9% (n = ... | 2007 | 17486235 |
| [geographical distribution and indicators entomologic of sinantropic triatomines captured in the state of goiás]. | the geographic distribution of triatomines in goiás and entomological indicators in the home environment are presented: home infestation, home triatomine density and vector infection by trypanosoma cruzi. the indicators studied were from triatomines captured inside and outside homes in 201 municipalities in the state of goiás, brazil, between 2000 and 2003. a total of 249,868 home units were investigated and 51,570 triatomines were captured, and 335 specimens were found to be infected with trypa ... | 2007 | 17568889 |
| [seroepidemiology of chagas disease in two rural populations in the municipality of costa de oro, at aragua state, northern venezuela]. | chagas disease has been a public health problem in latin america for many years. in venezuela the disease is mainly distributed in the rural populations and endemic areas with an overall seroprevalence index of 8,3% for the year 2000. | 2008 | 18645666 |
| geographical clustering of trypanosoma cruzi i groups from colombia revealed by low-stringency single specific primer-pcr of the intergenic regions of spliced-leader genes. | a low-stringency single-primer polymerase chain reaction (lssp-pcr) typing procedure targeted to the intergenic regions of spliced-leader genes (sl) was designed to profile trypanosoma cruzi i stocks from endemic regions of colombia. comparison between sl-lssp-pcr profiles of parasite dna from vector faeces and cultures isolated from those faeces showed more conservative signatures than profiles using lssp-pcr targeted to the minicircle variable regions (kdna). this was also observed by analysin ... | 2009 | 18850114 |
| [survey of triatominae (hemiptera: reduviidae) fauna in domestic environments and natural infection by trypanosomatidae in the state of mato grosso do sul]. | between 2000 and 2004, a survey of triatominae fauna (hemiptera: reduviidae) and examination of natural infection caused by trypanosomatidae in the state of mato grosso do sul, brazil, was conducted. a total of 13,671 specimens were collected. through fauna analysis on the insects that were caught, triatoma sordida was characterized as very abundant, very frequent, constant and dominant. the rates of natural infection with trypanosoma cruzi were 3.2% for panstrongylus geniculatus, 0.6% for rhodn ... | 2008 | 18853010 |
| [focus of chagas disease in são fidélis, in the state of rio de janeiro]. | four specimens of triatoma vitticeps and one of panstrongylus geniculatus were caught inside a home in the municipality of são fidélis, rio de janeiro. one of the specimens of triatoma vitticeps proved positive for infection with trypanosoma cruzi. two people living in that home (one adult and one adolescent) presented positive serology. | 2008 | 18853020 |
| [an entomological and seroepidemiological study of chagas' disease in an area in central-western venezuela infested with triatoma maculata (erichson 1848)]. | this article presents a study on seroepidemiological, entomologic, and risk factors for domiciliary infestation in a circumscribed area infested with triatoma maculata in parroquia xaguas, urdaneta municipality, lara state, venezuela. one hundred and forty households, 509 persons, and 110 dogs were sampled. serum anti-trypanosoma cruzi antibodies were determined by means of elisa and maba techniques using recombinant antigens. tr. cruzi infection in the triatomines was determined by direct micro ... | 2008 | 18949234 |
| analysis of an acute chagas disease outbreak in the brazilian amazon: human cases, triatomines, reservoir mammals and parasites. | an outbreak of chagas disease occurred in mazagão, amapá, brazilian amazon in 1996. seventeen of 26 inhabitants presented symptoms compatible with acute chagas disease and were submitted to parasitological and serological tests. all 17 were positive in at least one parasitological test and 11 were also igm or igg anti-trypanosoma cruzi positive. the nine asymptomatic patients were negative for parasites and one was positive for igg anti-t. cruzi. sixty-eight triatomines were captured (66 rhodniu ... | 2009 | 19118852 |
| incrimination of eratyrus cuspidatus (stal) in the transmission of chagas' disease by molecular epidemiology analysis of trypanosoma cruzi isolates from a geographically restricted area in the north of colombia. | following the report of two cases of acute chagas' disease and the appearance of several triatomine species in human dwellings in an area considered non-endemic for domestic transmission of trypanosoma cruzi; a epidemiological, entomological and t. cruzi molecular epidemiology analysis was performed in order to establish the transmission dynamic of the parasite in the studied area. 2 t. cruzi isolates from human patients, 5 from eratyrus cuspidatus, 4 from rhodnius pallescens, 4 from panstrongyl ... | 2009 | 19442641 |
| the triatominae species of french guiana (heteroptera: reduviidae). | an annotated list of the triatomine species present in french guiana is given. it is based on field collections carried out between 1993-2008, museum collections and a literature review. fourteen species, representing four tribes and six genera, are now known in this country and are illustrated (habitus). three species are recorded from french guiana for the first time: cavernicola pilosa, microtriatoma trinidadensis and rhodnius paraensis. the two most common and widely distributed species are ... | 2009 | 20140371 |
| [occurrences of triatomines in wild and domestic environments in the municipality of manaus, state of amazonas]. | analysis of the distribution of triatomines is essential for formulating control strategies for chagas disease in the amazon region. in this paper, the results from trapping in wild and artificial environments in rural and urban localities in manaus, amazonas, are presented. out of the 115 triatomines collected, 85 (73.9%) were of the species rhodnius pictipes, 25 (21.7%) of rhodnius robustus and five (4.4%) of panstrongylus geniculatus. the rate of natural infection by flagellates was 5.9% for ... | 2009 | 20209347 |
| occurrence of positivity for trypanosoma cruzi in triatomine from municipalities in southeastern brazil, from 2002 to 2004. | from an epidemiological point of view, more than 120 species of triatomine (hemiptera, reduviidae) are known. the occurrence and positivity for trypanosoma cruzi in triatomines in 16 municipalities of the triângulo mineiro and alto paranaíba were evaluated from january 2002 to december 2004. | 2010 | 20305960 |
| presence of intradomicile colonies of the triatomine bug panstrongylus rufotuberculatus in muñecas, la paz, bolivia. | chagas disease is a tropical parasitic disease endemic to latin america which affects more than 10 million people, and kills more than 15,000 people each year. this condition, caused by the protozoan parasite trypanosoma cruzi, is principally transmitted by kissing bugs (triatominae). in bolivia, recent reports by the departmental health service showed the presence of panstrongylus rufotuberculatus in dwellings located in the charazani valley (la paz). a study was then carried out in the area to ... | 2010 | 20955680 |
| epidemiological investigation of an acute case of chagas disease in an area of active transmission in peruvian amazon region. | the study objective was to investigate an acute case of chagas disease in the san pedro de shishita community, pebas district, in the peruvian amazon basin, a non-endemic area. both parents of the index case (acute case) were thoroughly interviewed, a seroepidemiological survey was carried out in the community, parasitological exams were carried out only in relatives of the index case, and triatomine bugs were searched for inside houses, peridomiciliary, and in wild environments. seroprevalence ... | 2010 | 21049232 |
| attraction of chagas disease vectors (triatominae) to artificial light sources in the canopy of primary amazon rainforest. | adult triatomines occasionally fly into artificially lit premises in amazonia. this can result in trypanosoma cruzi transmission to humans either by direct contact or via foodstuff contamination, but the frequency of such behaviour has not been quantified. to address this issue, a light-trap was set 45 m above ground in primary rainforest near manaus, state of amazonas, brazil and operated monthly for three consecutive nights over the course of one year (432 trap-hours). the most commonly caught ... | 2010 | 21225207 |
| spatial distribution of triatomines (reduviidae: triatominae) in urban areas of the city of salvador, bahia, brazil. | environmental changes have a strong influence on the emergence and/or reemergence of infectious diseases. the city of salvador, brazil -currently the focus of a housing boom linked to massive deforestation- is an example in point as the destruction of the remaining areas of the atlantic forest around the city has led to an increased risk for chagas disease. human domiciles have been invaded by the triatomine vectors of trypansoma cruzi, the flagellate protozoan causing chagas disease, a problem ... | 2011 | 21590670 |
| [probable outbreak of oral transmission of chagas disease in turbo, antioquia]. | chagas' disease is endemic in 21 countries of south and central america, including colombia, where 700,000 to 1.2 million persons are infected and eight millions are at risk. in endemic areas, chronic cases are predominant. however, in recent years, increasing reports of acute oral transmission have appeared. objective. an outbreak of acute chagas' disease was verified in the municipality of turbo (antioquia), and the most probable cause of transmission was determined in order to establish preve ... | 2011 | 22159534 |
| [Morphometric analysis of Panstrongylus geniculatus (Heteroptera: Reduviidae) from Caracas City, Venezuela]. | Introduction. In recent years, the assassin bug, Panstrongylus geniculatus, has been found infected with Trypanosoma cruzi in rural and urban areas of Caracas, Venezuela. Although historically this insect has been considered a forest species, it has become adapted to more urban artificial environments. Objective. The presence of sexual dimorphism was determined as an indicator of adaptation to domicilies. Material and methods. By Generalized Procrustes Analysis (GPA) and Elliptical Fourier Anal ... | 2011 | 22159489 |
| chagas' disease: an emergent urban zoonosis. the caracas valley (venezuela) as an epidemiological model. | the unprecedented emergence of important public health and veterinary zoonoses is usually a result of exponential population growth and globalization of human activities. i characterized chagas' disease as an emergent zoonosis in the caracas valley (venezuela) due to the following findings: the presence of reservoirs (didelphis marsupialis, rattus rattus) and vectors (panstrongylus geniculatus, panstrongylus rufotuberculatus) infected with trypanosoma cruzi in urbanized or marginalized areas; th ... | 2014 | 25520950 |
| potential distribution of chagas disease vectors (hemiptera, reduviidae, triatominae) in colombia, based on ecological niche modeling. | ecological niche modeling of triatominae bugs allow us to establish the local risk of transmission of the parasite trypanosoma cruzi, which causes chagas disease. this information could help to guide health authority recommendations on infection monitoring, prevention, and control. in this study, we estimated the geographic distribution of triatomine species in colombia and identified the relationship between landscape structure and climatic factors influencing their occurrence. a total of 2451 ... | 2016 | 28115946 |
| untangling the transmission dynamics of primary and secondary vectors of trypanosoma cruzi in colombia: parasite infection, feeding sources and discrete typing units. | trypanosoma cruzi is the causative agent of chagas disease. due to its genetic diversity has been classified into six discrete typing units (dtus) in association with transmission cycles. in colombia, natural t. cruzi infection has been detected in 15 triatomine species. there is scarce information regarding the infection rates, dtus and feeding preferences of secondary vectors. therefore, the aim of this study was to determine t. cruzi infection rates, parasite dtu, ecotopes, insect stages, geo ... | 2016 | 27903288 |
| [strategy for determining a baseline in areas of vector interruption for chagas disease]. | objectives present a strategy to determine the baseline in endemic areas in the process of vector interruption for chagas disease (chd). methods a social and environmental questionnaire and an entomological survey evaluated the physical conditions of dwellings, the inhabitants' knowledge of chd, the entomological triatomine indicators and the statistical relationship among these variables. results colonization and natural infection with trypanosoma cruzi exist in rhodnius prolixus, the principal ... | 2016 | 27706434 |
| trypanosoma cruzi-infected panstrongylus geniculatus and rhodnius robustus adults invade households in the tropics of cochabamba region of bolivia. | there are hardly any data available on the relationships between the parasite and the vector or regarding potential reservoirs involved in the natural transmission cycle of trypanosoma cruzi in the tropics of cochabamba, bolivia. local families from communities were responsible for the capture of triatomine specimens, following a strategic methodology based on entomological surveillance with community participation developed by the national chagas programme of the ministry of health of bolivia. | 2016 | 26984679 |
| amazonian triatomine biodiversity and the transmission of chagas disease in french guiana: in medio stat sanitas. | the effects of biodiversity on the transmission of infectious diseases now stand as a cornerstone of many public health policies. the upper amazonia and guyana shield are hot-spots of biodiversity that offer genuine opportunities to explore the relationship between the risk of transmission of chagas disease and the diversity of its triatomine vectors. over 730 triatomines were light-trapped in four geomorphological landscapes shaping french-guiana, and we determined their taxonomic status and in ... | 2016 | 26867025 |
| human trypanosomiasis in the eastern plains of colombia: new transmission scenario. | characteristics of trypanosoma cruzi infection were studied in a rural area of the eastern plains of colombia. using enzyme-linked immunosorbent assay and indirect fluorescent-antibody tests, the infection was determined in 11.6% of the inhabitants of 142 dwellings. during 6 months of community surveillance, in 42.3% dwellings, 609 triatomines were collected (597 rhodnius prolixus and seven, three, one, and one of panstrongylus geniculatus, psammolestes arturi, eratyrus mucronatus, and triatoma ... | 2016 | 26728765 |
| risks associated with dispersive nocturnal flights of sylvatic triatominae to artificial lights in a model house in the northeastern plains of colombia. | control initiatives and continuous surveillance of vector-borne transmission have proved to be effective measures for diminishing the incidence of chagas disease in endemic countries. however, the active dispersal of infected sylvatic adult triatomines by flight represents one of the main obstacles to eliminating domestic transmission. | 2015 | 26582012 |
| global climate change effects on venezuela's vulnerability to chagas disease is linked to the geographic distribution of five triatomine species. | we analyzed the possible effects of global climate change on the potential geographic distribution in venezuela of five species of triatomines (eratyrus mucronatus (stal, 1859), panstrongylus geniculatus (latreille, 1811), rhodnius prolixus (stål, 1859), rhodnius robustus (larrousse, 1927), and triatoma maculata (erichson, 1848)), vectors of trypanosoma cruzi, the etiological agent of chagas disease. to obtain the future potential geographic distributions, expressed as climatic niche suitability ... | 2015 | 26336258 |
| detection of high percentage of trypanosoma cruzi infection, the etiologic agent of chagas disease, in wild populations of colombian caribbean triatomines. | in colombia it is estimated that about 900,000 persons are infected with t. cruzi. there are 25 triatomine species and 5 of them have been reported infected with t. cruzi in the colombian caribbean region. in order to obtain more information about the triatomine populations in this region, 89 wild triatomines were collected from four colombian departments. the most frequent specie collected was rhodnius pallescens (65%), followed by rhodnius prolixus (20%), panstrongylus geniculatus (10.1%) and ... | 2015 | 26204001 |
| update on oral chagas disease outbreaks in venezuela: epidemiological, clinical and diagnostic approaches. | orally transmitted chagas disease has become a matter of concern due to outbreaks reported in four latin american countries. although several mechanisms for orally transmitted chagas disease transmission have been proposed, food and beverages contaminated with whole infected triatomines or their faeces, which contain metacyclic trypomastigotes of trypanosoma cruzi, seems to be the primary vehicle. in 2007, the first recognised outbreak of orally transmitted chagas disease occurred in venezuela a ... | 2015 | 25946155 |
| triatominae survey (hemiptera: reduviidae: triatominae) in the south-central region of the state of bahia, brazil between 2008 and 2013. | triatomine surveillance in rural areas, artificial ecotypes, and natural ecotopes of the cities of caturama, ibipitanga, macaúbas, and seabra in the south-central region of the brazilian state of bahia was carried out between 2008 and 2013. natural infection by trypanosoma cruzi was evaluated in the specimens collected to monitor vectors of chagas disease. a total of 1,357 specimens were collected, and four species were identified: triatoma sordida (83%), triatoma lenti (16.4%), triatoma pseudom ... | 2015 | 25802433 |
| panstrongylus geniculatus and four other species of triatomine bug involved in the trypanosoma cruzi enzootic cycle: high risk factors for chagas' disease transmission in the metropolitan district of caracas, venezuela. | chagas' disease is caused by the protozoan trypanosoma cruzi and is autochthonous to the americas. its distribution depends on triatomine bugs that are responsible for the transmission of the disease. in 2005, we reported the presence of panstrongylus geniculatus as a risk for chagas' disease transmission in caracas and neighboring areas. three massive oral outbreaks occurred in the following years. here we report the results of a 7-year study on triatomine species found in the metropolitan dist ... | 2014 | 25532708 |
| the main sceneries of chagas disease transmission. the vectors, blood and oral transmissions--a comprehensive review. | this review deals with transmission of trypanosoma cruzi by the most important domestic vectors, blood transfusion and oral intake. among the vectors, triatoma infestans, panstrongylus megistus, rhodnius prolixus, triatoma dimidiata, triatoma brasiliensis, triatoma pseudomaculata, triatoma sordida, triatoma maculata, panstrongylus geniculatus, rhodnius ecuadoriensis and rhodnius pallescens can be highlighted. transmission of chagas infection, which has been brought under control in some countrie ... | 2015 | 25466622 |
| trypanosoma cruzi strains from triatomine collected in bahia and rio grande do sul, brazil. | collection of triatomines in domestic, peridomestic and sylvatic environments in states of bahia and rio grande do sul, northeastern and southern brazil respectively, and isolation of trypanosoma cruzi strains. | 2014 | 24897051 |
| [attalea butyracea palms adjacent to housing as a source of infestation by rhodnius prolixus (hemiptera: reduviidae)]. | the presence of rhodnius prolixus in palms on the eastern plains area of colombia provide a high risk for infection with trypanosoma cruzi. intensive surveillance of the palm tree habitat are necessary to confirm the presence of bugs and provide evidence that this habitat is a source of house infestations. | 2012 | 23242302 |
| validation of a poisson-distributed limiting dilution assay (lda) for a rapid and accurate resolution of multiclonal infections in natural trypanosoma cruzi populations. | trypanosoma cruzi is the causative agent of american trypanosomiasis, a complex zoonotic disease that affects more than 10million people in the americas. strains of this parasite possess a significant amount of genetic variability and hence can be divided into at least six discrete typing units (dtus). the life cycle of this protist suggests that multiclonal infections may emerge due to the likelihood of contact of triatomine insects with more than 100 mammal species. to date, there have been a ... | 2013 | 23159798 |
| the sylvatic transmission cycle of trypanosoma cruzi in a rural area in the humid chaco of argentina. | little is known about the sylvatic transmission cycle of trypanosoma cruzi in the gran chaco ecoregion. we conducted surveys to identify the main sylvatic hosts of t. cruzi, parasite discrete typing units and vector species involved in pampa del indio, a rural area in the humid argentinean chaco. a total of 44 mammals from 14 species were captured and examined for infection by xenodiagnosis and polymerase chain reaction amplification of the hyper-variable region of kinetoplast dna minicircles of ... | 2012 | 22771688 |
| after five years of chemical control: colonies of the triatomine eratyrus mucronatus are still present in bolivia. | chagas disease, which is caused by the parasite trypanosoma cruzi, is transmitted to humans by blood-sucking bugs (triatominae). eratyrus mucronatus is a well-dispersed triatomine species, found sometimes in dwellings. in the apolo region of bolivia, people continue to complain of bites by this bug despite five years of chemical control. for the first time, the domiciliation process of e. mucronatus was evaluated in a zone treated by insecticide, and it was compared with a previous situation 14 ... | 2012 | 22634204 |
| new discoveries of sylvatic triatoma infestans (hemiptera: reduviidae) throughout the bolivian chaco. | sylvatic populations of triatoma infestans might be involved in the recolonization of human dwellings. we report here the discoveries of new t. infestans sylvatic foci in the bolivian chaco. eighty-one triatomines were caught, 38 of which were identified as t. infestans. triatoma sordida and panstrongylus geniculatus were the other species collected. one t. infestans and one t. sordida were infected with trypanosoma cruzi tci; one t. infestans was infected with tcii. these discoveries add to the ... | 2012 | 22403316 |
| amines from vertebrates guide triatomine bugs to resources. | most triatomine bugs (heteroptera: reduviidae) are nest-living insects that require vertebrate blood or invertebrate haemolymph to complete their life cycle. vertebrates accumulate excretory products in or near their nesting sites and we hypothesize that triatomines use emanations from such host wastes when searching for resources. here we recount how triatomine bugs increase upwind locomotion on a servosphere in response to volatile amine constituents of vertebrate excretions. fresh chicken fae ... | 2014 | 25260571 |
| [diversity of triatominae (hemiptera: reduviidae) in santander, colombia: epidemiological implications]. | domestic and wild triatomines in the department of santander have an epidemiological impact, as recently they have been linked to outbreaks of acute chagas disease. the analysis of their diversity and temporal variation contributes to the understanding of their biology and ecology in one of the most endemic areas of the country. | 2017 | 28527247 |
| triatominae species of suriname (heteroptera: reduviidae) and their role as vectors of chagas disease. | nine species of triatominae, representing three tribes and five genera, are currently known in suriname. an annotated list of the species based on the collections of the bureau of public health (suriname), the national zoological collection suriname and the national history museum leiden (the netherlands) is provided. additionally, the results of several years of opportunistic collection in two domestic environments are presented. the most common species are rhodnius pictipes stål, 1972, rhodniu ... | 2014 | 25004146 |
| geographic distribution of chagas disease vectors in brazil based on ecological niche modeling. | although brazil was declared free from chagas disease transmission by the domestic vector triatoma infestans, human acute cases are still being registered based on transmission by native triatomine species. for a better understanding of transmission risk, the geographic distribution of brazilian triatomines was analyzed. sixteen out of 62 brazilian species that both occur in >20 municipalities and present synanthropic tendencies were modeled based on their ecological niches. panstrongylus genicu ... | 2012 | 22523500 |
| spatial patterns and eco-epidemiological systems--part i: multi-scale spatial modelling of the occurrence of chagas disease insect vectors. | studies that explicitly and specifically take into account the spatial dimension within the study of eco-epidemiological systems remain rare. our approach of modelling the spatial and/or temporal properties of the entomological and/or epidemiological data before their mapping with possible explanatory variables, objectively underline the significant patterns at different scales. the domiciliary and peri-domiciliary presence and abundance of juvenile and adult vectors of the chagas disease (triat ... | 2011 | 22109862 |
| [epidemiology of chagas' disease in french guiana: natural infection of panstrongylus geniculatus]. | | 2013 | 14250510 |
| high trypanosoma spp. diversity is maintained by bats and triatomines in espírito santo state, brazil. | the aim of this study was to reevaluate the ecology of an area in the atlantic forest, southeast brazil, where chagas disease (cd) has been found to occur. in a previous study, immediately after the occurrence of a cd case, we did not observe any sylvatic small mammals or dogs with trypanosoma cruzi cruzi infections, but triatoma vitticeps presented high t. c. cruzi infection rates. in this study, we investigated bats together with non-volant mammals, dogs, and triatomines to explore other possi ... | 2017 | 29176770 |
| [description of external cuticular setae of head, thorax, legs, abdomen and genitalia of four triatominae species]. | the classification of the cuticular extensions of insects has been proposed as a taxonomic tool; however, the internal and external processes of the cuticular extensions of the triatominae subfamily have not been fully analyzed and categorized. objective: to describe the setae from different regions of the outer cuticle of several triatomine species by scanning electron microscopy. materials and methods: triatomines were washed and dried, after which different regions of the body from eratyrus m ... | 2016 | 27869382 |
| geographical distribution and intra-domiciliary capture of sylvatic triatomines in la convención province, cusco, peru. | the geographical distribution and intra-domiciliary capture of sylvatic triatomines in three districts of the province of la convención, cusco, peru are presented. in the district of vilcabamba, eight adults of rhodnius pictipes and five adults of panstrongylus geniculatus were found. in the district of ocobamba, 19 adults, 14 nymphs, and eggs of p. rufotuberculatus were found. in the district of echarate, six adults and 10 nymphs of eratyrus mucronatus, an adult of r. pictipes and p. geniculatu ... | 2010 | 20602026 |
| [triatominae species] | this paper provides a checklist of 15 known species of the triatominae subfamily in maranhão state. on the coastal são luís island there are a total of 10 species associated with sylvatic areas (eratyrus mucronatus, psammolestes tertius, panstrongylus diasi) and periurban and urban areas (panstrongylus geniculatus, panstrongylus lignarius, rhodnius nasutus, rhodnius neglectus, rhodnius pictipes, rhodnius robustus and triatoma rubrofasciata). the last was found only on são luís island, while the ... | 1998 | 9592224 |
| drivers of house invasion by sylvatic chagas disease vectors in the amazon-cerrado transition: a multi-year, state-wide assessment of municipality-aggregated surveillance data. | insecticide spraying efficiently controls house infestation by triatomine bugs, the vectors of trypanosoma cruzi. the strategy, however, is ineffective against sylvatic triatomines, which can transmit chagas disease by invading (without colonizing) man-made structures. despite growing awareness of the relevance of these transmission dynamics, the drivers of house invasion by sylvatic triatomines remain poorly understood. | 2017 | 29145405 |
| spatial distribution of triatomines in domiciles of an urban area of the brazilian southeast region. | reports of triatomine infestation in urban areas have increased. we analysed the spatial distribution of infestation by triatomines in the urban area of diamantina, in the state of minas gerais, brazil. triatomines were obtained by community-based entomological surveillance. spatial patterns of infestation were analysed by ripley's k function and kernel density estimator. normalised difference vegetation index (ndvi) and land cover derived from satellite imagery were compared between infested an ... | 2016 | 26814643 |
| vital statistics of triatominae (hemiptera: reduviidae) under laboratory conditions: iv. panstrongylus geniculatus. | a cohort of 100 eggs of panstrongylus geniculatus (latreille) was reared in the laboratory under constant conditions (temperature 26 ± 1°c, 60 ± 10% rh), with mortality and fecundity data recorded weekly. we calculated stage-specific development times, age-specific mortality and fecundity (18.4 eggs/♀/wk), and stage-specific and total preadult mortality (31.6%), and the weekly intrinsic rate of natural increase (r(o) = 0.096), the finite population growth rate (λ = 1.109), the net reproductive r ... | 2015 | 26336251 |
| a preliminary study of haemolymph from four venezuelan populations of panstrongylus geniculatus latreille, 1811 (hemiptera: reduviidae) and its epidemiological significance. | sds-page profiles of both sexes of the haemolymphs of panstrongylus geniculatus from different venezuelan regions (savannas, piedmont, tropical forest and urban areas) were compared. it was determined that the haemolymphs showed a different electrophoretic profile, with proteins that ranged from 14 to 164 kda. the most representative protein band in the profile of females was observed in two sectors: between 164 and 46 kda and between 33 and 30 kda. the main illustrative protein band in males wa ... | 2013 | 23427431 |