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Search Results: 1 - 10 of 61772 matches for " Leticia CARRIZALES-Yá?EZ "
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LA COMUNICACIóN DE RIESGOS COMO UNA HERRAMIENTA PARA DISMINUIR LA EXPOSICIóN INFANTIL A PLOMO Y ARSéNICO EN LA ZONA CONTAMINADA DE VILLA DE LA PAZ-MATEHUALA, SAN LUIS POTOSí, MéXICO
Citlalhit CORONADO-SALAS,Fernando DíAZ-BARRIGA,Ana Rosa MORENO-SáNCHEZ,Leticia CARRIZALES-Yá?EZ
Revista internacional de contaminación ambiental , 2012,
Abstract: Se dise ó, implementó y evaluó un programa de comunicación de riesgos (CR) para disminuir la exposición infantil a plomo y arsénico en la zona minera de Villa de la Paz-Matehuala. Se dise ó el programa y se aplicó a 142 ni os (5 a 12 a os de edad) de la zona. La evaluación se realizó mediante análisis de dibujos, cuestionarios y monitoreo biológico para determinar los niveles de plomo en sangre (PbS) y arsénico en orina (AsO). Los dibujos y cuestionarios aplicados a los ni os y padres de familia indicaron un aprendizaje, cambio en la percepción de riesgos y en conductas relacionadas con la contaminación. Los niveles de PbS en la mayoría de los ni os disminuyeron (p < 0.0001), no así los niveles de AsO. Se logró disminuir la exposición al Pb y cambió la percepción hacia la contaminación de la zona. El presente trabajo establece las bases para el uso de este tipo de programas en sitios contaminados.
Dise?o y aplicación de un Programa de Comunicación de Riesgos para la salud ambiental infantil en un sitio contaminado con plomo y arsénico
Cubillas-Tejeda,Ana Cristina; Torres-Nerio,Rocío; Díaz-Barriga Martínez,Fernando; Carrizales-Yá?ez,Leticia; Coronado-Salas,Citlalhit; Nieto Caraveo,Luz María; Moreno Sánchez,Ana Rosa; Barraza Lomelí,Laura;
Ciência & Saúde Coletiva , 2011, DOI: 10.1590/S1413-81232011001100017
Abstract: a metallurgical industry in san luis potosí city, méxico, has contaminated the zone by lead (pb) and arsenic (as). since 1989 were reported by our group high concentrations of pb in blood (pbb) and as in urine (asu) in the local children. in present work, a risk communication program (rcp) was generated to inform the children about the environmental risks of the site where they live, and to change conducts to diminish the exposure to pb and as. we worked with 170 children (5 to 7 years) of the zone. the rcp was applied and the evaluation was realized by means of analysis of drawings, questionnaires and biological monitoring. in drawings of the children appeared toxic elements such as pb, contaminated soil, cigarettes, among others. in the questionnaires applied to the children and family parents it was possible to estimate a change in the knowledge and in some conducts with regard to the pollutants, their effects and their exposure. there was not a decrease in the levels of pbb and in the levels of asu. these were due probably because the principal route of exposure is not only the soil that had been contemplated previously.
Meningoencefalitis por cryptococcus: Reporte de un caso clínico y revisión de la literatura
Hirsch B,Tamara; Hannig K,Sonia; Yá?ez P,Leticia;
Revista chilena de pediatría , 2000, DOI: 10.4067/S0370-41062000000400009
Abstract: cryptococcal infection is rare in children, especially in immunocompetent patients. an immunocompetent preschool child was admitted due to a severe meningoencephalitis, with clear cerebrospinal fluid and focal lesions. treatment for herpetic meningoencephalitis was commenced and mild recovery was initially observed. the patient was readmitted due to progression of the neurological symptoms. an aetiologic study was performed and cryptococcus was demonstrated in the csf. we present this case of cryptococcal meningoencephalitis, its diagnosis and a review of the literature. we advise that in all patients presenting with meningoencephalitis, clear csf and an unknown aetilogy an india ink test should be performed
Meningoencefalitis por cryptococcus: Reporte de un caso clínico y revisión de la literatura Cryptococcal meningoencefalitis: a clinical case report and literature review
Tamara Hirsch B,Sonia Hannig K,Leticia Yá?ez P
Revista chilena de pediatría , 2000,
Abstract: La infección por Cryptococcus en el ni o es muy infrecuente especialmente si es inmunocompetente. Se presenta un preescolar inmunocompetente con meningoencefalitis grave con líquido cefalorraquídeo claro y signos neurológicos de focalización, tratado como meningoencefalitis herpética. Evolucionó inicialmente con leve mejoría, reingresando por aumento del compromiso neurológico. Se amplió el estudio etiológico y se detectó Cryptococcus en el LCR. Se comenta el cuadro clínico de la meningoecefalitis cryptococócica su diagnóstico y revisión de la literatura. Nos parece aconsejable incluir el test de tinta china en toda meningoencefalitis a líquido claro de etiología no precisada Cryptococcal infection is rare in children, especially in immunocompetent patients. An immunocompetent preschool child was admitted due to a severe meningoencephalitis, with clear cerebrospinal fluid and focal lesions. Treatment for herpetic meningoencephalitis was commenced and mild recovery was initially observed. The patient was readmitted due to progression of the neurological symptoms. An aetiologic study was performed and cryptococcus was demonstrated in the CSF. We present this case of cryptococcal meningoencephalitis, its diagnosis and a review of the literature. We advise that in all patients presenting with meningoencephalitis, clear CSF and an unknown aetilogy an India ink test should be performed
Plomo y arsénico en la subcuenca del Alto Atoyac en Tlaxcala, México
García-Nieto, Edelmira;Carrizales-Ya?ez, Leticia;Juárez-Santacruz, Libertad;García-Gallegos, Elizabeth;Hernández-Acosta, Elizabeth;Briones-Corona, Elia;Vázquez-Cuecuecha, Oscar G.;
Revista Chapingo. Serie ciencias forestales y del ambiente , 2011, DOI: 10.5154/r.rchscfa.2010.06.040
Abstract: environmental indicators in the zahuapan-atoyac hydrological system (za:hs) in tlaxcala, mexico, a region impacted by wastewater discharges from urban, agricultural and industrial sources, were assessed. samples were collected in the spring 2008 dry season. sixteen sampling stations were selected, stretching from the source of the zahuapan river, including three samples from the atoyac river, to its exit point from the state of tlaxcala. arsenic, lead, ph and temperature were measured in the water samples; in the sediments, the following were measured: arsenic, lead, texture, organic matter content, total organic carbon, ph and electrical conductivity according to nmx-aa-051-scfi-2001, goyberg-rein and vázquez, 2003 and nom-021-semarnat-2000. the results showed that the arsenic concentrations ranged from 0.06 to 0.87 mgl-1 in water and from 1.3 to 127 mg·kg-1 in sediment, whereas lead levels reached up to 1.05 mgl-1 in water from a place called el ojito and 89.5 mgl-1 in sediment from the apizaco station. these levels exceeded the national and international levels set for drinking water and protection of aquatic life. the results suggest an anthropogenic contribution at some stations that adds to natural pollution.
Exposición infantil al plomo en sitios contaminados
Flores-Ramírez,Rogelio; Rico-Escobar,Edna; Nú?ez-Monreal,Jorge E; García-Nieto,Edelmira; Carrizales,Leticia; Ilizaliturri-Hernández,César; Díaz-Barriga,Fernando;
Salud Pública de México , 2012, DOI: 10.1590/S0036-36342012000400008
Abstract: objective: to assess the exposure to lead in children living in various types of contaminated sites. materials and methods: the study was conducted from june 2008 to december 2009 at four sites in mexico: avalos metallurgical, chihuahua; morales metallurgical, san luis potosí (slp); trinidad pottery area, tlaxcala and cedral mine site, slp. these sites contain different sources of lead. the metal levels were quantified in outdoor dust and in peripheral blood of children. results: lead dust concentrations exceed the national guidelines for residential soils (400 mg/kg) in a range of values for the four sites from 62 to 5 187 mg/kg. regarding biological monitoring, the studied children showed maximum lead blood levels of 22 μg/dl in cedral, 31 μg/dl in morales, 32 μg/dl in avalos, and 52 μg/dl in trinidad. it is important to mention that in all the studied sites, a significative positive correlation was found between blood lead levels and the lead concentrations in dust. conclusion: these sites are an example of the health risks related to lead exposure in mexico; therefore, there is an urgent need for a national public health program aimed at reducing lead exposure in vulnerable populations.
Infección por metapneumovirus humano en ni os hospitalizados por una enfermedad respiratoria aguda grave: Descripción clínico- epidemiológica A human metapneumovirus infection in hospitalized infant patients with severe acute respiratory tract infection: A clinical and epidemiological view
JAIME LOZANO C,LETICIA Yá?EZ P,MICHELANGELO LAPADULA A,MóNICA LAFOURCADE R
Revista Chilena de Enfermedades Respiratorias , 2009,
Abstract: El metapneumovirus humano (hMPV) es un virus de reciente diagnóstico. Se asocia con infecciones respiratorias agudas altas y bajas (IRAb). Se efectuó un estudio prospectivo durante dos a os con el objetivo de evaluar la tasa de circulación y los hallazgos clínicos asociados a la infección por hMPV en ni os hospitalizados por una IRAb grave. Resultados: hMPV fue demostrado en 24 (10,5%) de los 229 ni os enrolados. 42% de los pacientes con hMPV eran menores de 12 meses de edad y el 58% tenía al menos un factor de riesgo para evolución grave de la enfermedad. El diagnóstico más frecuente fue neumonía (62,5%). Un 42% de los pacientes requirieron ventilación mecánica asistida por falla respiratoria severa. La co-infección con otros virus respiratorios no significó una enfermedad más grave. En conclusión nuestro estudio confirma la importancia del hMPV como un agente importante en la IRAb grave en ni os. Human metapneumovirus (hMPV) is a newly recognized virus associated with upper and lower respiratory tract infection (LRTI). A prospective - 2 - years study aimed to evaluate the circulation rate and the clinical features associated with hMPV infection was conducted in children hospitalized by a severe LRTI. Results: hMPV was found in 24 (10.5%) out of the 229 children enrolled. 42%> hMPV patients were under 12 months-old and 58% have at least one risk factor for severe course of the illness. The most common diagnosis was pneumonia (62.5%). Fourty two percent of the patients required assisted ventilation for severe respiratory failure. Co-infections with other respiratory viruses did not result in greater severity of illness. In conclusion our study supports the significant role of hMPV as a major pathogen in severe LRTI in children.
Asma agudo severo en ni os: Fenotipo diferente? Severe asthma in children: A different phenotype?
Jaime Lozano C,Leticia Yá?ez P,Michelangelo Lapadula A,Carlos Fernández C
Revista Chilena de Enfermedades Respiratorias , 2012,
Abstract: La magnitud de la respuesta al tratamiento de una exacerbación de asma es variable entre los pacientes y una proporción significativa de ellos debe hospitalizarse. Objetivos: Definir el perfil de los ni os que se hospitalizaron por asma grave y los posibles indicadores y determinantes de la respuesta desfavorable al tratamiento. Método: Estudio prospectivo en ni os de 4 a os o más, con búsqueda etiológica de la exacerbación y estudio de perfil inflamatorio en esputo. Resultados: 60 ni os entre 4 y 15 a os. El 50% tenía diagnóstico previo de asma sin uso regular de corticoesteroides inhalados en dos tercios. Hospitalizaciones previas por asma en el 40%. La etiología de la exacerbación fue identificada en el 52% siendo los agentes más frecuentes Rhinovirus, Metapneumovius, VRS y Mycoplasma pneumoniae. El perfil inflamatorio fue determinado en 33 ni os: eosinofílico en 36% y eosinoflico/neutroflico en 64%. Comentario: El asma severa con exacerbaciones graves sería un fenotipo cuyos aspectos destacados en esta cohorte serían: ni os con hospitalizaciones previas, falta de tratamiento profiláctico, infección viral como desencadenante frecuente, patrón inflamatorio combinado del esputo y rinitis atópica. Background: The magnitude of response to treatment of asthma exacerbations is variable and a significant proportion of them need hospitalization. Objectives: to define the profile of children that were hospitalized for severe asthma and the possible indicators and determinants of their poor responsiveness. Methods: a prospective study in 60 children 4 years or more of age with a search of the ethiology of the exacerbation and a study of the inflammatory profile in sputum. Results: 60 children between 4 and 15 years. 50% had a previous diagnosis of asthma without regular use of inhaled corticosteroids in two thirds. 40% had previous admissions for asthma. Etiology of the exacerbation was identified in 52% with Rhinovirus, human Metapneumovirus, RSV and Mycoplasma pneumoniae as the most frequent agents. Inflammatory profile was determined in 33 children: eosinophilic in 36%, eosinophilic/ neutrophilic in 64%. Conclusions: Severe asthma with serious exacerbations may be a phenotype whose outstanding aspects in this cohort were: previous hospitalizations, lack of prophylactic treatment, viral infections as frequent trigger, and combined inflammatory cell profile in sputum.
Enfermedad de Moyamoya, a propósito de dos casos Moyamoya disease, 2 case-report
LETICIA Yá?EZ P,MARCELA PAREDES M,MICHELANGELO LAPADULA A,PATRICIO MARTíNEZ T
Revista chilena de pediatría , 2008,
Abstract: La enfermedad de Moyamoya es una enfermedad cerebrovascular oclusiva, progresiva de ambas arterias carótidas internas o sus ramas, compensada por el desarrollo de una fina red vascular colateral. Su etiología es desconocida, aunque distintos estudios han asociado su patogénesis a factores genéticos y ambientales. En Pediatría se manifiesta generalmente como crisis isquémicas transitorias o infartos cerebrales, mientras que en adultos es más frecuente la hemorragia cerebral1,2. En países donde es más frecuente, como Japón, se ha logrado hacer un diagnóstico precoz en pacientes aún asintomáticos, gracias al desarrollo de la Resonancia magnética con angiogra a cerebral2. La cirugía de revascularización lograría reducir la incidencia de nuevos episodios isquémicos y mejorar el pronóstico a largo plazo de los pacientes que padecen esta patología3. Presentamos a continuación dos casos que han llegado a nuestro centro en un período de 9 a os. Moyamoya Disease is a progressive occlusive cerebrovascular disease of both internal carotid arteries and their branches, with compensatory development of a fine collateral vascular network. The etiology of the disease is unknown; however, several studies have suggested involvement of genetic and environmental factors in its pathogenesis. In children, it causes transient ischemic attacks and cerebral infarction, while bleeding is more frequent in adults. In Japan, where the disease is most frequently observed, the development of magnetic resonance with angiography has allowed diagnosis in asymptomatic Moyamoya Disease. Revascularization surgery is believed to reduce the incidence of new ischemic events and improve long term prognosis in these patients. We present 2 children with Moyamoya Disease treated in our Chmc between 1998 and 2007.
Enfermedad de Moyamoya, a propósito de dos casos
Yá?EZ P,LETICIA; PAREDES M,MARCELA; LAPADULA A,MICHELANGELO; MARTíNEZ T,PATRICIO; DURAN H,FERNANDO;
Revista chilena de pediatría , 2008, DOI: 10.4067/S0370-41062008000600008
Abstract: moyamoya disease is a progressive occlusive cerebrovascular disease of both internal carotid arteries and their branches, with compensatory development of a fine collateral vascular network. the etiology of the disease is unknown; however, several studies have suggested involvement of genetic and environmental factors in its pathogenesis. in children, it causes transient ischemic attacks and cerebral infarction, while bleeding is more frequent in adults. in japan, where the disease is most frequently observed, the development of magnetic resonance with angiography has allowed diagnosis in asymptomatic moyamoya disease. revascularization surgery is believed to reduce the incidence of new ischemic events and improve long term prognosis in these patients. we present 2 children with moyamoya disease treated in our chmc between 1998 and 2007.
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