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Search Results: 1 - 10 of 462411 matches for " Antonieta;Mejía "
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Epidemiology of Chagas disease in Guatemala: infection rate of Triatoma dimidiata, Triatoma nitida and Rhodnius prolixus (Hemiptera, Reduviidae) with Trypanosoma cruzi and Trypanosoma rangeli (Kinetoplastida, Trypanosomatidae)
Monroy Carlota,Rodas Antonieta,Mejía Mildred,Rosales Regina
Memórias do Instituto Oswaldo Cruz , 2003,
Abstract: A five-year domiciliary collection in the 22 departments of Guatemala showed that out of 4,128 triatomines collected, 1,675 were Triatoma dimidiata (Latreille, 1811), 2,344 were Rhodnius prolixus Stal 1859, and only 109 were T. nitida Usinger 1939. The Chagas disease parasite, Trypanosoma cruzi, was found in all three species. Their natural infection rates were similar in the first two species (20.6%; 19.1%) and slightly lower in T. nitida(13.8%). However there was no significant difference in the infection rates in the three species (p = 0.131). T. dimidiata males have higher infection rates than females (p = 0.030), whereas for R. prolixus there is no difference in infection rates between males and females (p = 0.114). The sex ratios for all three species were significantly skewed. More males than females were found inside houses for T. dimidiata (p < 0.0001) and T. nitida (p = 0.011); a different pattern was seen for R. prolixus (p = 0.037) where more females were found. Sex ratio is proposed as an index to show the mobility of T. dimidiata in different populations. T. dimidiata is widely distributed in the country, and is also the main vector in at least ten departments, but R. prolixus with higher vectorial capacity is an important vector in at least two departments.
Geographic distribution and morphometric differentiation of Triatoma nitida usinger 1939 (Hemiptera: Reduviidae: Triatominae) in Guatemala
Monroy, Carlota;Bustamante, Dulce María;Rodas, Antonieta;Rosales, Regina;Mejía, Mildred;Tabaru, Yuichiro;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000100006
Abstract: triatoma nitida was found in 14 (0.4%) out of 3,726 houses located in six departments across guatemala, which were surveyed from 1994 to 1998 by the man-hour collection method. compared to previous information, the distribution of t. nitida in guatemala has increased from five to nine departments; the species is present in mild climates at altitudes from 960 to 1,500 m. fourteen percent of the intradomestic t. nitida were infected with trypanosoma cruzi. the species was often found in conjunction with other triatomines (t. dimidiata and rhodnius prolixus). the domestic and peridomestic presence of t. nitida in guatemala was rare, but occasionally this species was colonizing human-made constructions. t. nitida appears to have a low importance as chagas disease vector in guatemala, as indicated by its scarce presence in the domestic habitats and defecation patterns. however, it clearly has potential to become a chagas vector so we recommend an on-going study of the intradomestic presence of t. nitida following the control programs in guatemala. morphometric analysis of 47 t. nitida males from three localities showed quantitative differences between the populations, which indicates that geographic distance is an important factor in the structuring of t. nitida populations.
Epidemiology of Chagas disease in Guatemala: infection rate of Triatoma dimidiata, Triatoma nitida and Rhodnius prolixus (Hemiptera, Reduviidae) with Trypanosoma cruzi and Trypanosoma rangeli (Kinetoplastida, Trypanosomatidae)
Monroy, Carlota;Rodas, Antonieta;Mejía, Mildred;Rosales, Regina;Tabaru, Yuichiro;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000300003
Abstract: a five-year domiciliary collection in the 22 departments of guatemala showed that out of 4,128 triatomines collected, 1,675 were triatoma dimidiata (latreille, 1811), 2,344 were rhodnius prolixus stal 1859, and only 109 were t. nitida usinger 1939. the chagas disease parasite, trypanosoma cruzi, was found in all three species. their natural infection rates were similar in the first two species (20.6%; 19.1%) and slightly lower in t. nitida(13.8%). however there was no significant difference in the infection rates in the three species (p = 0.131). t. dimidiata males have higher infection rates than females (p = 0.030), whereas for r. prolixus there is no difference in infection rates between males and females (p = 0.114). the sex ratios for all three species were significantly skewed. more males than females were found inside houses for t. dimidiata (p < 0.0001) and t. nitida (p = 0.011); a different pattern was seen for r. prolixus (p = 0.037) where more females were found. sex ratio is proposed as an index to show the mobility of t. dimidiata in different populations. t. dimidiata is widely distributed in the country, and is also the main vector in at least ten departments, but r. prolixus with higher vectorial capacity is an important vector in at least two departments.
Soil and Leaf Micronutrient Composition in Contrasting Habitats in Podzolized Sands of the Amazon Region  [PDF]
María Antonieta Sobrado
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.410235
Abstract:

Plant macronutrient distribution in podzolized sands of the Amazon caatinga has received attention in several studies; however, the distribution of micronutrients has not been assessed. Soil micronutrient availability has been hypothesized to reflect contrasting habitat characteristics as well as fundamental differences in substrate, and leaf micronutrient composition may reflect the macronutrient content needed to maintain balance for leaf cell functions. In this study, soil and leaf samples were obtained in a toposequence (valley, slope, and mound). Available soil micro- and macronutrients as well as total leaf content were measured by inductively coupled plasma-atomic emission spectrometer and mass spectroscopy. Soil Zn (<1.41 mg·kg-1) and B (<0.31 mg·kg-1) as well as Cu (<1.33 mg·kg-1) levels were very low. Soil Mn was low in the valleys and slopes (0.62-0.87 mg·kg-1), but higher in the mound (6.59 mg·kg-1). Soil Fe (11.48-21.13 mg·kg-1) was well above the critical level in all of

Las Fuerzas Armadas en la estructura del Estado peruano del siglo XIX
María Antonieta Escalante
Pensamiento Constitucional , 1995,
Abstract: La monografía no presenta resumen.
Fátima Graciela Musri: Músicos inmigrantes. La familia Colecchia en la actividad musical de San Juan, 1880-1910. San Juan (Argentina): Editorial de la Facultad de Filosofía, Humanidades y Artes (EFFHA), Universidad Nacional de San Juan, 2004
María Antonieta Sacchi
Revista musical chilena , 2005,
Abstract:
Evaluación económica de programas y servicios de salud
Mejía Mejía,Aurelio;
Revista Gerencia y Políticas de Salud , 2008,
Abstract: the gap between what medicine can do and what it is economically feasible to do makes more relevant the economic evaluation of health care programmes as a tool that makes explicit what otherwise would be implicit and informs decision makers about the health impact and resource use of different health programmes, which may offer society a better understanding of political process and resource allocation. this article shows the steps in an economic evaluation in health. also, some methodological issues are discussed.
An Alternative Manifold for Cosmology Using Seifert Fibered and Hyperbolic Spaces  [PDF]
Maria E. Mejía, Reinaldo R. Rosa
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.56096
Abstract:

We propose a model with 3-dimensional spatial sections, constructed from hyperbolic cusp space glued to Seifert manifolds which are in this case homology spheres. The topological part of this research is based on Thurston’s conjecture which states that any 3-dimensional manifold has a canonical decomposition into parts, each of which has a particular geometric structure. In our case, each part is either a Seifert fibered or a cusp hyperbolic space. In our construction we remove tubular neighbourhoods of singular orbits in areas of Seifert fibered manifolds using a splice operation and replace each with a cusp hyperbolic space. We thus achieve elimination of all singularities, which appear in the standard-like cosmological models, replacing them by “a torus to infinity”. From this construction, we propose an alternative manifold for cosmology with finite volume and without Friedmann-like singularities. This manifold was used for calculating coupling constants. Obtaining in this way a theoretical explanation for fundamental forces is at least in the sense of the hierarchy.

Los errores de medicación como un problema sanitario
Arbesú Michelena,María Antonieta;
Revista Cubana de Farmacia , 2008,
Abstract: errors are inherent to human behavior and they result from the concatenation of multiple factors or failures linked with the latent processes and deficiencies related to working procedures, technological means, labor conditions, etc. as the medication errors are common, a description of national and international updated bibliographic reports with definitions connected with this topic was made to show the importance and seriousness of the problem for the safety of the health system, since their detection and action by various initiatives could reduce their occurrence. it is known that a lot of errors are trivial and that they do not damage the patient; however, they are an indicator of low quality health care and, therefore, a health problem.
Los errores de medicación como un problema sanitario Medications errors as a health problem
María Antonieta Arbesú Michelena
Revista Cubana de Farmacia , 2008,
Abstract: El error es inherente a la conducta humana y se debe a la concatenación de múltiples factores o fallos vinculados a los procesos y a los fallos latentes relacionados con los procederes de trabajo, los medios tecnológicos, las condiciones laborales, entre otras. Los errores de medicación son frecuentes, por lo que en este trabajo se realizó una descripción de reportes bibliográficos actualizados nacionales e internacionales con definiciones relacionadas con la temática, que demostró la importancia y la gravedad del problema para la seguridad del sistema sanitario, pues su detección y accionar mediante variadas iniciativas podrían disminuir su ocurrencia, ya que se sabe que una gran cantidad de los errores de medicación son triviales y no causan da o al paciente, sin embargo, sí constituyen un indicador de baja calidad de la asistencia sanitaria y por tanto, un problema sanitario. Errors are inherent to human behavior and they result from the concatenation of multiple factors or failures linked with the latent processes and deficiencies related to working procedures, technological means, labor conditions, etc. As the medication errors are common, a description of national and international updated bibliographic reports with definitions connected with this topic was made to show the importance and seriousness of the problem for the safety of the health system, since their detection and action by various initiatives could reduce their occurrence. It is known that a lot of errors are trivial and that they do not damage the patient; however, they are an indicator of low quality health care and, therefore, a health problem.
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