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Search Results: 1 - 10 of 26586 matches for " Trujillo Contreras Francisco "
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Serological follow-up of Trypanosoma cruzi infection from 1987 to 1994 in 32 counties of the State of Jalisco, Mexico: preliminary report
Trujillo-Contreras, Francisco;Yerenas, Maria Angeles V.;
Cadernos de Saúde Pública , 1995, DOI: 10.1590/S0102-311X1995000300026
Abstract: in 1987 the university of guadalajara performed a seroepidemiological survey on the prevalence of chagas? disease in the 124 counties of the state of jalisco, mexico, arriving at a rate of 21.6 per 100 inhabitants. from december 1993 to june 1994, we studied 2238 individuals from 32 rural counties in this state. of these, we found 276 positives (12.33%) and 1962 negatives (87.66%). nevertheless, the series of serological differences found are very striking, since out of the 655 individuals that were seropositive in 1987, we noted that 276 individuals remained positive, while 50 individuals (7.63%) became negative. there were no flaws in the laboratory techniques. we believe that either the immune response of mexicans is different or that the virulence of the mexican strains of trypanosoma cruzi may be not as great as that in the south america countries.
Serological follow-up of Trypanosoma cruzi infection from 1987 to 1994 in 32 counties of the State of Jalisco, Mexico: preliminary report
Trujillo-Contreras Francisco,Yerenas Maria Angeles V.
Cadernos de Saúde Pública , 1995,
Abstract: In 1987 the University of Guadalajara performed a seroepidemiological survey on the prevalence of Chagas? disease in the 124 counties of the State of Jalisco, Mexico, arriving at a rate of 21.6 per 100 inhabitants. From December 1993 to June 1994, we studied 2238 individuals from 32 rural counties in this State. Of these, we found 276 positives (12.33%) and 1962 negatives (87.66%). Nevertheless, the series of serological differences found are very striking, since out of the 655 individuals that were seropositive in 1987, we noted that 276 individuals remained positive, while 50 individuals (7.63%) became negative. There were no flaws in the laboratory techniques. We believe that either the immune response of Mexicans is different or that the virulence of the Mexican strains of Trypanosoma cruzi may be not as great as that in the South America countries.
Seguimiento serológico de infección por Trypanosoma cruzi en individuos estudiados de 50 municipios del Estado de Jalisco, México de 1987 a 1994
Trujillo Contreras Francisco,Villanueva Yerenas Maria de los Angeles,Soto Gutiérrez Margarita,Raygoza Anaya Miguel
Revista da Sociedade Brasileira de Medicina Tropical , 2000,
Abstract: La Universidad de Guadalajara decidió realizar en 1987 un estudio seroepidemiológico para conocer la prevalencia de la infección por Trypanosoma cruzi en los 124 municipios del Estado de Jalisco, México, en el cual se obtuvieron tasas de 21,6 por 100 habitantes. De diciembre de 1993 a junio de 1994 se realizó un seguimiento de algunos de esos individuos, estudiándose sólo 2669 de ellos, de 50 municipios de áreas rurales del estado. Las causas de no encuesta de los faltantes fueron diversas, estando entre las más importantes la emigración (27,6) y la renuencia (14,8). Encontramos a 476 positivos (17,8%) y 2193 negativos (82,2%). Este segundo estudio nos permitió detectar 80 infectados nuevos (2,9%) lo que representa una tasa de incidencia de 30 por 1000 habitantes. Sin embargo, encontramos una seroconversión en los individuos estudiados, ya que de 1007 individuos que estaban positivos en 1987, 943 de ellos continúan así, mientras, que 64 individuos se negativizaron (2,3%), no siendo esto imputable a fallas de laboratorio, la prevalencia de positividad detectada en ambos estudios fue casi idéntica 18,1 y 17,8 % respectivamente, por lo que nosotros pensamos que las condiciones en que viven los individuos de las localidades rurales del Estado de Jalisco favorecen a que las infecciones continúen.
Seguimiento serológico de infección por Trypanosoma cruzi en individuos estudiados de 50 municipios del Estado de Jalisco, México de 1987 a 1994
Trujillo Contreras, Francisco;Villanueva Yerenas, Maria de los Angeles;Soto Gutiérrez, Margarita;Raygoza Anaya, Miguel;Jiménez Corder, Alberto;
Revista da Sociedade Brasileira de Medicina Tropical , 2000, DOI: 10.1590/S0037-86822000000600011
Abstract: in 1987 the university of guadalajara performed a seroepidemiological survey in order to know the prevalence of infection for trypanosoma cruzi in the 124 counties of the state of jalisco, mexico in which appraisals of 21.6 for 100 inhabitants were gotten. from december of 1993 to june of 1994 was carried out a pursuit of some those individuals, studying it only to 2669 of they, of 50 municipalities of rural areas of the state. the causes off not survey of the not found was diverse, being between the most important the emigration (27.6%) and the not cooperation (14.8%). we found to 476 positives (17.8%) and 2193 negatives (82.2%). this second study allowed us detect 80 new cases (2.9%) the one which represents an appraisal of incidence of 30 for 100 inhabitants. however we found a seroconvertion in the studied individuals, since of 1007 individuals that were positives in 1987; 943 of them continues so, while 64 individuals became negative (2.3%), not being this attributable to flaws of laboratory, the prevalence of positivite detected in both studies was almost identical, 18.1 and 17.8 % respectly, for the one which we believe that the conditions in that the individuals of the rural towns of the state of jalisco live favor to that the infections continue.
Listeria monocytogenes como bioindicador sanitario para el control ambiental de las aguas incorporadas a los embalses
Sepúlveda Montes,Adán; Martínez González,Nanci Edid; Ramírez Gómez,Aída Cecilia; Raygoza Anaya,Miguel; Trujillo Contreras,Francisco;
Revista Cubana de Higiene y Epidemiolog?-a , 2002,
Abstract: the present study is an epidemiologic environmental trial aimed at isolating and identifying listeria monocytogenes from dammed up waters. it was conducted at the lagoon of zapotlán, which is an important tourist resort in the southern region of the state of jalisco. it also provides neighboring cities and populations with fish. moore's pledget was used to isolate listeria spp. from the samples obtained in 3 canals with sewage coming from 2 nearby municipalities. pledgets had 2 exposure times (1 h and 24 h). a total of 60 samples were taken from september 1997, to february 1998. the 2 exposure times were considered in each sample. of the 60 studied samples, 42 (70 %) were positive for listeria ssp. and 40 (66.6 %) for listeria monocytogenes. the latter was the most frequently found with 133 of the 150 isolated strains. it is obvious that the species are widely distributed in the zone and may disseminate themselves very easily in the region and in the country. though the results do not show significant differences for the 2 exposure times, they suggest that when the pledget is exposed for 24 hours there is a higher probability of attaining isolation than when it is exposed during 1 hour.
Biology of three species of the Meccus phyllosomus complex (Hemiptera: Reduviidae: Triatominae) fed on blood of hens and rabbits
Martínez-Ibarra, José Alejandro;Alejandre-Aguilar, Ricardo;Torres-Morales, Alfredo;Trujillo-García, Josefina Cecilia;Nogueda-Torres, Benjamín;Trujillo-Contreras, Francisco;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000700014
Abstract: aspects related to hatching, life time, number of blood meals to molt, mortality, feeding time and postfeed defecation delay for each instar of meccus phyllosomus, m. mazzottii, and m. bassolsae, life-cycle were evaluated and compared in two cohorts of each of those three species, fed on hens or rabbits. no significant (p > 0.05) differences were recorded among cohorts fed on hens respect to cohorts fed on rabbits in m. phyllosomus and m. mazzottii and the average time of hatching was 21.5 days for cohorts fed on hens and 22.5 for cohorts fed on rabbits. average egg-to-adult development times were no significant (p > 0.05) different between both cohorts of m. phyllosomus and m. mazzotti, independent of the blood meal source. the average span in days for each instar fed on hens was not significantly different to the average span for each instar fed on rabbits, when comparisons were made by species. the number of blood meals at each nymphal instar varied from 1 to 6 in both cohorts of each species. the mortality rates were higher on older nymphs, in both cohorts of m. phyllosomus and m. bassolsae, whereas they were higher on first instar nymphs on m. mazzottii. mean feeding time was no significant (p > 0.05) different in triatomines fed on hens or fed on rabbits, when each species were compared separately. a similar number of nymphs of each cohort, completed the cycle. defecation delay was no significant (p > 0.05) different when cohorts fed on hens and fed on rabbits were compared by species. most of the studied parameters showed no significant (p > 0.05) differences among those cohorts fed on hens and for fed on rabbits, which could mean a high degree of association of those species with birds as much as mammals, under wild conditions, increasing their capacity to colonize human dwellings.
Prevalencia de deficiencia de hierro y yodo, y parasitosis en ni?os de Arandas, Jalisco, México
Vásquez-Garibay,Edgar Manuel; Romero-Velarde,Enrique; Nápoles-Rodríguez,Francisco; Nu?o-Cosío,María Eugenia; Trujillo-Contreras,Francisco; Sánchez-Mercado,Oscar;
Salud Pública de México , 2002, DOI: 10.1590/S0036-36342002000300001
Abstract: objective. to estimate the prevalence of iron deficiency, iodine deficiency and parasitosis in children attending the instituto alte?o para el desarrollo de jalisco ((highlands institute for development of jalisco state, inadej), arandas, jalisco, mexico. material and methods. a cross-sectional study was conducted between 1997 and 1999, among 432 children aged 12 to 120 months attending the inadej. measurements included hematological values, urine iodine concentration, and presence of parasites. student's t test chi square tests were used for parametric and non-parametric analysis. results. the prevalence figures of anemia (20 vs 7.4%, p=0.007) and iron deficiency (60.9 vs 44.4%, p=0.02) were higher in preschool than in school children. iodine deficiency was found in 29% (10.5% moderate or severe) and parasitosis in 47.2% of children, mainly e. histolytica (30.2%) and g. lamblia (28.9%). low income, male gender and lack of social security policy holding were associated to parasitosis. conclusions. the high prevalence rates of iron deficiency, iodine deficiency, and parasitosis, should be addressed by state health services with effective interventions to restrain these preventable diseases.
Molecular characterization of Trypanosoma cruzi Mexican strains and their behavior in the mouse experimental model
Gómez-Hernández, César;Rezende-Oliveira, Karine;Nascentes, Gabriel Ant?nio Nogueira;Batista, Lara Rocha;Kappel, Henrique Borges;Martinez-Ibarra, José Alejandro;Trujillo Contreras, Francisco;Lages-Silva, Eliane;Ramírez, Luis Eduardo;
Revista da Sociedade Brasileira de Medicina Tropical , 2011, DOI: 10.1590/S0037-86822011005000058
Abstract: introduction: for a long time, the importance of chagas disease in mexico, where many regarded it as an exotic malady, was questioned. considering the great genetic diversity among isolates of trypanosoma cruzi, the importance of this biological characterization, and the paucity of information on the clinical and biological aspects of chagas disease in mexico, this study aimed to identify the molecular and biological characterization of trypanosoma cruzi isolates from different endemic areas of this country, especially of the state of jalisco. methods: eight mexican trypanosoma cruzi strains were biologically and genetically characterized (pcr specific for trypanosoma cruzi, multiplex-pcr, amplification of space no transcript of the genes of the mini-exon, amplification of polymorphic regions of the mini-exon, classification by amplification of intergenic regions of the spliced leader genes, rapd - (random amplified polymorphic dna). results: two profiles of parasitaemia were observed, patent (peak parasitaemia of 4.6×106 to 107 parasites/ml) and subpatent. in addition, all isolates were able to infect 100% of the animals. the isolates mainly displayed tropism for striated (cardiac and skeletal) muscle. pcr amplification of the mini-exon gene classified the eight strains as tci. the rapd technique revealed intraspecies variation among isolates, distinguishing strains isolated from humans and triatomines and according to geographic origin. conclusions: the mexican t. cruzi strains are myotrophic and belong to group tci.
Prevalência de triatomíneos (Hemíptera: Reduviidae: Triatominae) infectados por Trypanosoma cruzi: sazonalidade e distribui??o na regi?o Ciénega do Estado de Jalisco, México
Gómez-Hernández, César;Rezende-Oliveira, Karine;Zárate, Agustín Cortés;Zárate, Esperanza Cortés;Trujillo-Contreras, Francisco;Ramirez, Luis Eduardo;
Revista da Sociedade Brasileira de Medicina Tropical , 2008, DOI: 10.1590/S0037-86822008000300007
Abstract: the physical and geographical characteristics of the ciénega region, jalisco, mexico make it suitable for transmission of trypanosoma cruzi, the causative agent for chagas disease. this study characterizes the prevalence of triatomines infected by this parasite, their seasonality and their distribution in this region. a total of 328 triatomines were evaluated between january 2005 and june 2007, from 13 municipalities in the region. april, may and june were the months with the highest capture levels. among the triatomines examined, 57.3% were positive for trypanosoma cruzi, corresponding to 15.4% in urban areas and 84.6% in rural areas. the species with greatest prevalence was triatoma longipennis and the species with the highest parasitism rate was triatoma barberi, with an infection rate of 83.3%, whereas the rate for triatoma longipennis was 67.5% (p<0.05). this natural infection in the captured vectors may indicate that individuals in this region have high exposure to trypanosoma cruzi. the recent findings of positive triatoma dimidiata in this region suggest that new species are becoming adapted to the ecological conditions of these populations.
Risk of Falls in Parkinson’s Disease: A Cross-Sectional Study of 160 Patients
Ana Contreras,Francisco Grandas
Parkinson's Disease , 2012, DOI: 10.1155/2012/362572
Abstract: Falls are a major source of disability in Parkinson’s disease. Risk factors for falling in Parkinson’s disease remain unclear. To determine the relevant risk factors for falling in Parkinson’s disease, we screened 160 consecutive patients with Parkinson’s disease for falls and assessed 40 variables. A comparison between fallers and nonfallers was performed using statistical univariate analyses, followed by bivariate and multivariate logistic regression, receiver-operating characteristics analysis, and Kaplan-Meier curves. 38.8% of patients experienced falls since the onset of Parkinson’s disease (recurrent in 67%). Tinetti Balance score and Hoehn and Yahr staging were the best independent variables associated with falls. The Tinetti Balance test predicted falls with 71% sensitivity and 79% specificity and Hoehn and Yahr staging with 77% sensitivity and 71% specificity. The risk of falls increased exponentially with age, especially from 70 years onward. Patients aged >70 years at the onset of Parkinson’s disease experienced falls significantly earlier than younger patients.
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