| [the national survey of seroprevalence for evaluation of the control of chagas disease in brazil (2001-2008)]. | a survey for seroprevalence of chagas disease was held in a representative sample of brazilian individuals up to 5 years of age in all the rural areas of brazil, with the single exception of rio de janeiro state. blood on filter paper was collected from 104,954 children and screened in a single laboratory with two serological tests: indirect immunofluorescence and enzyme linked immunoassay. all samples with positive or indetermined results, as well as 10% of all the negative samples were submitt ... | 2011 | 21584364 |
| surveillance of chagas disease vectors in municipalities of the state of ceará, brazil. | the present study aimed to analyse the dwelling infestation rates and the distribution and natural trypanosoma cruzi infection rates, among triatomines captured in the 13 municipalities of the state of ceará. the records relating to the capture of intradomicile and peridomicile triatomines during the chagas disease control program of 1998-2008 were available. among the triatomines captured and in all of the municipalities studied, triatoma brasiliensis presented the highest incidence in intradom ... | 2009 | 20140377 |
| ecological aspects of rhodnius nasutus stål, 1859 (hemiptera: reduviidae: triatominae) in palms of the chapada do araripe in ceará, brazil. | the aim of this work is to present aspects related to the ecology of rhodnius nasutus stål, 1859 in palms from chapada do araripe in ceará, brazil. the following five species of palms were investigated: babaçu (attalea speciosa), buriti (mauritia flexuosa), carnaúba (copernicia prunifera), catolé (syagrus oleracea) and macaúba-barriguda (acrocomia intumescens). fifth palms were dissected (10 specimens for each species). the overall infestation index was 86%, with a total of 521 triatomines colle ... | 2008 | 19148424 |
| Investigation of Chagas disease in four periurban areas in northeastern Brazil: epidemiologic survey in man, vectors, non-human hosts and reservoirs. | Chagas disease was investigated in four periurban areas of Ceará state, northeastern Brazil, through serological, parasitological and molecular methods in humans, reservoirs and vectors. A cross-sectional survey revealed a seroprevalence rate of 1.2% (13/1076 residents, six also proving positive through PCR). Trypanosoma cruzi infection was not detected in children under 10 years old. Triatoma pseudomaculata prevailed in the peridomiciles: 63 specimens, 69% (34/49) infected with trypanosomatids. ... | 2011 | 22136953 |
| genetic polymorphism in trypanosoma cruzi i isolated from brazilian northeast triatomines revealed by low-stringency single specific primer-polymerase chain reaction. | different molecular markers have been employed for typing trypanosoma cruzi strains from endemic areas of chagas disease. the low-stringency single specific primer-polymerase chain reaction (lssp-pcr) has been a sensitive and informative technique that uses the variable region of kinetoplast dna minicircles as a genetic marker, allowing detection of dna sequence variation. in the present study, we analyzed the intra-lineage genetic variability of the t. cruzi strains obtained from triatomine fec ... | 2008 | 18633644 |
| ecology of triatoma brasiliensis in northeastern brazil: seasonal distribution, feeding resources, and trypanosoma cruzi infection in a sylvatic population. | we assessed some ecological parameters of triatoma brasiliensis in rock piles in the state of ceará during the rainy and dry seasons. the greatest density was in april (median = 12.5 triatomines/site). the greatest abundance was in december, when the insects were more dispersed and the density per site was lower (6 triatomines/site). the nutritional status of females and 5th instar nymphs was increased in july. the rate of t. cruzi infection reached its highest peak in july (10.9%). elisa reveal ... | 2010 | 21175946 |
| [studies of the epidemiology of chagas' disease in ceara. 3. region of baixo jaguaribe]. | | 2016 | 4957719 |
| [feeding sources evaluation of panstrongylus lutzi (neiva & pinto, 1923) (hemiptera: reduviidae: triatominae) in the state of ceará]. | the authors used precipitin technique to detect the feeding sources of panstrongylus lutzi (neiva & pinto, 1923) in 20 municipalities of ceará state, brazil. the results detected the presence of blood from eight different blood sources and mixed feedings, demonstrating that panstrongylus lutzi is an eclectic species. high infection rates for trypanosoma like-cruzi were detected. | 2006 | 17119749 |
| [epidemiology of chagas disease in four rural localities in jaguaruana, state of ceará: seroprevalence of infection, parasitemia and clinical characteristics]. | a cross-sectional study on chagas disease that examined the populations of four localities (n masculine = 541 inhabitants) in the municipality of jaguaruana, state of ceará, showed seroprevalence of chagas infection of 3.1%, as assessed by indirect immunofluorescence, indirect hemagglutination and elisa tests. the rate was higher among adults over 50 years old, without any difference in relation to sex. positive parasitemia was found in 11.8% (2/17) of the seropositive individuals by means of in ... | 2008 | 18853005 |
| occurrence and variability of panstrongylus lutzi in the state of ceará, brazil. | panstrongylus lutzi is generally restricted to the "caatinga" areas of north-eastern brazil. adult insects are frequently found in local houses, but colonies have not previously been registered in the statistics of the control programme of chagas disease. in ceará state, our study revealed increasing occurrence of this species, usually with high infection rates for trypanosoma cruzi, and always represented by adults that invaded the artificial environment. we also found nymphs in the peridomicil ... | 2005 | 16172758 |
| eco-epidemiology of chagas disease in northeastern brazil: triatoma brasiliensis, t. pseudomaculata and rhodnius nasutus in the sylvatic, peridomestic and domestic environments. | an entomological survey was carried out in four rural localities situated in the state of ceará, assessing chagas disease seroprevalence in man, focusing on the presence of vectors in natural foci contiguous to the domestic and peridomestic environments. fifty-three triatoma brasiliensis, nine t. pseudomaculata and 71 rhodnius nasutus were collected in their natural habitats as far as 10 m from the houses, and 663, 59 and 8 respectively were captured in peridomestic artificial structures, adjace ... | 2011 | 21979785 |
| first report on the occurrence of trypanosoma rangeli tejera, 1920 in the state of ceará, brazil, in naturally infected triatomine rhodnius nasutus stål, 1859 (hemiptera, reduviidae, triatominae). | the aim of this work was to identify and report the occurrence of trypanosoma rangeli and trypanosoma cruzi in naturally infected rhodnius nasutus (hemiptera, reduviidae, triatominae) in the state of ceará, brazil. triatomines feces, salivary glands, and hemolymph were collected for fresh examination, and specific detection of t. rangeli and t. cruzi dna by polymerase chain reaction was carried out. the specific characterization of these two parasites showed the simultaneous presence of both par ... | 2007 | 17710312 |
| [occurrence of panstrongylus lutzi, in peridomiciliary areas, state of ceará, brazil]. | from january 2001 to october 2002 captures were made in domicile and peridomiciliary areas of 13 cities of region of cariri, south of the state of ceará. as results, the occurrence of p. lutzi in this area was noticed, for the first time, in three cities: the presence of one adult in chicken house in altaneira, one adult flying, in salitre and 18 nymphs in varzea alegre(13 in bricks pile and five in roofing tile pile). in varzea alegre city it was observed the colonization in the peridomicile. | 2004 | 15311300 |
| the epidemiologic importance of triatoma brasiliensis as a chagas disease vector in brazil: a revision of domiciliary captures during 1993-1999. | to clarify the epidemiologic importance of triatoma brasiliensis, the most important chagas disease vector in the northeastern of brazil, capture data related to this species, its distribution, capture index, and percentages of natural infection by trypanosoma cruzi were examined in 12 different brazilian states. the brazilian national health foundation collected these data from 1993 to 1999, a period during which a total of 1,591,280 triatomines (21 species) were captured in domiciles within th ... | 2003 | 12937751 |
| dynamics between sylvatic, peridomestic and domestic populations of triatoma brasiliensis (hemiptera: reduviidae) in ceara state, northeastern brazil. | triatoma brasiliensis is the most important chagas disease vector in the drier regions of the "brazilian caatinga", colonizing both sylvatic and domestic environments, usually forming abundant colonies. control trials using insecticides against domestic and peridomestic populations suggest that the t. brasiliensis has a high capacity to repopulate treated habitats from the neighboring sylvatic populations, making its elimination more complex. the aim of this work was to determine genetic variabi ... | 2005 | 15589804 |
| [use of random amplified polymorphic dna (rapd) in the populational study of triatoma brasiliensis neiva, 1911]. | we evaluated the genetic variability of triatoma brasiliensis, the main vector of chagas disease in northeast brazil, using specimens from three populations. regions of genomic dna were amplified by rapd (random amplified polimorphic dna), using two primers. the products were visualized after polyacrylamide gel electrophoresis followed by silver staining. a dendrogram constructed through the dice similarity coefficient allowed for separation of the tested specimens into three distinct groups. th ... | 2000 | 11119326 |
| epidemiology of chagas disease in jaguaruana, ceará, brazil. i. presence of triatomines and index of trypanosoma cruzi infection in four localities of a rural area. | in order to assay the triatomine infestation and domiciliation in the rural area of jaguaruana district, state of ceará, brazil, we studied, from november 2000 to april 2002, 4 localities comprising 158 domiciles as a whole, with an average of 4 inhabitants/house, who are dwelling in there for more than 7 years. most houses have tile-covered roofs and the walls built with plaster-covered bricks (57%), followed by bricks without plaster (33%), and mud walls (7.5%). a total of 3082 triatomines wer ... | 2004 | 15273797 |
| trypanosoma cruzi transmission cycle among wild and domestic mammals in three areas of orally transmitted chagas disease outbreaks. | we report trypanosoma cruzi infection in wild and domestic mammals from three orally acquired chagas disease outbreak areas in brazil. cachoeiro do arari (pará) displayed a panzootic scenery (positive mammals in all ecologic strata), and human cases were probably the consequence of their exposure within the sylvatic t. cruzi transmission cycle. in navegantes (santa catarina), didelphis spp. was the main reservoir host, given that 93% were infected. in redenção (ceará), monodelphis domestica and ... | 2008 | 18981516 |
| prevalence of chagas disease in a rural area in the state of ceara, brazil. | chagas disease is caused by trypanosoma cruzi and affects about two to three million people in brazil, still figuring as an important public health problem. a study was conducted in a rural area of the municipality of limoeiro do norte - ce, northeastern brazil, aiming to determine the prevalence of t. cruzi infection. of the inhabitants, 52% were examined, among whom 2.6% (4/154) were seropositive in at least two serological tests. all seropositive individuals were older than 50 years, farmers, ... | 2015 | 26603232 |