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PARáSITOS INTESTINALES EN UNA COMUNIDAD SUBURBANA DE CIUDAD BOLíVAR, ESTADO BOLíVAR, VENEZUELA
Devera Rodolfo,Amaya Iván,Blanco Ytalia,Requena Ixora
Salud, Arte y Cuidado , 2012,
Abstract: To determine the prevalence of enteroparasites infection in “Gran Sabana”, a suburban community of Bolivar State, 168 inhabitants were evaluated. A fecal sample was obtained from each person and analyzed by direct examination, Kato method, spontaneous sedimentation and Kinyoun staining. The prevalence of intestinal parasites was 79.6%. Nodifferences in age (p > 0.05) or sexes (p > 0.05) were observed among individuals parasited. Twelve species of enteroparasites were diagnosed. Protozoans (97.2%) were more frequent than helminthes. Blastocystys sp. was the most prevalent parasite (64.9%). 61.2% of infected was poliparasited (82/134). The parasitic associations most common were: Blastocystys sp./ Giardia intestinalis (12.5%), Blastocystys sp./ Entamoeba coli (12.5%) and Blastocystyssp./ Endolimax nana (11.0%). We conclude that the prevalence of enteroparasites was high among inhabitants in the suburban community of “Gran Sabana” in Bolivar Sate.
Prevalencia de parásitos intestinales en escolares de la Escuela Básica Estadal José Félix Blanco, estado Bolívar, Venezuela.
Rodolfo Devera,Ixora Requena,Ytalia Blanco,Fadia Al Rumhein
Salus Online , 2010,
Abstract: Intestinal parasitism in school-age children is one of the main medical problems In Venezuela. The prevalence of these infections is variable, but, in general, it is higher in school children. The objective of this study was to determine the prevalence of intestinal parasites in school children enrolled in the State Primary School Jose Felix Blanco, San Felix, Bolivar State, Venezuela. 274 children, between 6 and 15 years of age, were evaluated in February, 2006. A stool sample of each student was collected and analyzed by means of spontaneous sedimentation and formol-ether techniques. The prevalence of enteroparasites was 62.6% (174/278). No difference in age (X2= 2.388 f.d. = 4 p > 0.05) or gender (p > 0.05) was observed in the affected group. Eleven species of parasites and/or commensals were diagnosed. Among protozoan, Blastocystis hominis (44.6%) and Giardia lamblia (12.6%); and among helminths, Ascaris lumbricoides (15.5%) and Trichuris trichiura (11.5%) were the most common. In conclusion, a high prevalence of intestinal parasitism was found in the sample of school children evaluated, with predominance of protozoan, mainly B. hominis
Enterobius vermicularis en pre-escolares de un área suburbana en San Félix, estado Bolívar, Venezuela Enterobius vermicularis in preschool children from a suburban area in San Félix, Bolívar State, Venezuela
Ixora Requena,Yolimar Jiménez,Natacha Rodríguez,Maria Sandoval
Investigación Clínica , 2007,
Abstract: Para determinar la prevalencia de enterobiosis en ni os en edad pre-escolar, se realizó una investigación, entre mayo y julio de 2003, en la UEE Teresa de la Parra en San Félix, Estado Bolívar, Venezuela. A cada ni o se le tomaron 3 muestras de la región perianal mediante el método de Graham y una muestra de material subungueal mediante raspado y corte de las u as. Estas se preservaron en formol al 10% y luego se les aplicó el método de formol-éter. También se tomó una muestra fecal la cual fue analizada mediante examen directo y la técnica de formol-éter. La prevalencia para E. vermicularis fue de 45,8% (27/59). No hubo diferencias en cuanto a sexo (Χ2 = 1,23 g.l = 2) y edad (p > 0,05) de los ni os parasitados. No se encontraron huevos de Enterobius en ninguna de las 59 muestras de material subungueal. En conclusión, a pesar de determinarse una elevada prevalencia de huevos de E. vermicularis mediante el método de Graham, no se pudo establecer relaciones entre la presencia de E. vermicularis en la cinta adhesiva y el depósito subungueal de los ni os evaluados. To determine the enterobiosis prevalence in preschool children, a study was carried out from may-july 2003, in the SEU “Teresa de la Parra” in San Félix, Bolívar State, Venezuela. Three samples from the perianal region were obtained from every child, by applying the Graham method, and one sample was obtained of the subungueal deposit by scraping and cutting off their finger nails. These samples were preserved in 10% formol and processed by the formol-ether method. Also, a stool sample was collected and analyzed by direct examination and the formol-ether method. The prevalence of Enterobius vermicularis was 45.8% (27/59). No differences in relation to age (Χ2 = 1.23 d. f. = 2) and sex (p > 0.05) were observed between the infected children. The eggs E. vermicularis were not observed in the 59 samples of subungueal deposits. In conclusion, although the enterobiosis prevalence was high, as determined by the Graham method, a relationship could not be found between E. vermicularis in the scotch tape and the finger nail samples of the children evaluated.
Prevalencia de Blastocystis hominis en vendedores ambulantes de comida del municipio Caroní, Estado Bolívar, Venezuela
Requena Ixora,Hernández Yessica,Ramsay Mario,Salazar Carmen
Cadernos de Saúde Pública , 2003,
Abstract: Para determinar la prevalencia de Blastocystis hominis en una muestra de vendedores ambulantes de comida, aparentemente sanos, se realizó un estudio seccional con 415 personas que acudieron al Ambulatorio Urbano tipo III "Manoa" (Municipio Caroní, Estado Bolívar, Venezuela), Programa de Higiene del Adulto, a solicitar el certificado de salud para trabajar como vendedores de comida. Una muestra de heces obtenida por evacuación espontánea fue analizada mediante la técnica de examen directo y método de concentración de Willis. Se encontraron 150 personas parasitadas (36,14%), de ellas 107 (25,78%) con B. hominis. No se observó predilección por el sexo (p > 0,05), pero sí con relación a la edad, siendo las personas de 18 a 27 a os las más afectados (ji2 = 12,17; g.l. = 4). En el 71,02% de los casos se encontró como parásito único y en 28,98% de los casos asociados a otros parásitos, siendo el más frecuentemente asociado Giardia lamblia (2,41%). En la mayoría de las personas parasitadas (85%) el protozoario se observó en un número menor de cinco células por campo. Se concluye que B. hominis es un parásito frecuente en manipuladores de alimentos del Municipio Caroní, Estado Bolívar, Venezuela.
Enterobius vermicularis en pre-escolares de un área suburbana en San Félix, estado Bolívar, Venezuela
Requena,Ixora; Jiménez,Yolimar; Rodríguez,Natacha; Sandoval,Maria; Alcala,Frannegy; Blanco,Ytalia; Devera,Rodolfo;
Investigación Clínica , 2007,
Abstract: to determine the enterobiosis prevalence in preschool children, a study was carried out from may-july 2003, in the seu ?teresa de la parra? in san félix, bolívar state, venezuela. three samples from the perianal region were obtained from every child, by applying the graham method, and one sample was obtained of the subungueal deposit by scraping and cutting off their finger nails. these samples were preserved in 10% formol and processed by the formol-ether method. also, a stool sample was collected and analyzed by direct examination and the formol-ether method. the prevalence of enterobius vermicularis was 45.8% (27/59). no differences in relation to age (χ 2 = 1.23 d. f. = 2) and sex (p > 0.05) were observed between the infected children. the eggs e. vermicularis were not observed in the 59 samples of subungueal deposits. in conclusion, although the enterobiosis prevalence was high, as determined by the graham method, a relationship could not be found between e. vermicularis in the scotch tape and the finger nail samples of the children evaluated.
Enteroparásitos en estudiantes de la Escuela Técnica Agropecuaria Robinsoniana ?Caicara?, Caicara del Orinoco, municipio Cede?o, estado Bolívar, Venezuela
Devera,Rodolfo; Blanco,Ytalia; Requena,Ixora; Tedesco,Rosa María; Alvarado,José; Alves,Nellys; Belisario,Richard;
Kasmera , 2010,
Abstract: to determine the prevalence of enteroparasites, 136 students attending the escuela técnica agropecuaria robinsoniana ?caicara?, caicara del orinoco, cede?o municipality, state of bolivar, were assessed. a stool sample was collected for each student, which was analyzed by direct examination, kato, willis, spontaneous sedimentation and agar plate culture techniques. the prevalence of intestinal parasites was 89% (121/136). in all age groups, parasites were diagnosed (χ2 = 3.873, f.d. = 3 p > 0.05). both sexes were equally affected (p > 0.05). a total of 12 species of parasites and/or commensals were diagnosed. protozoa were more prevalent (98.4%) than helminthes (30.0). blastocystis hominis was the most prevalent intestinal parasite in 79.4%. in conclusion, results showed a high prevalence (89%) of intestinal parasitic infection in the population studied, with no predilection for sex or age, with prevalence for protozoa, particularly b. hominis. sanitary and sanitation deficiencies could explain such high prevalence rates.
Prevalencia de Blastocystis hominis en vendedores ambulantes de comida del municipio Caroní, Estado Bolívar, Venezuela
Requena, Ixora;Hernández, Yessica;Ramsay, Mario;Salazar, Carmen;Devera, Rodolfo;
Cadernos de Saúde Pública , 2003, DOI: 10.1590/S0102-311X2003000600016
Abstract: a cross-sectional survey was conducted to determine the prevalence of blastocystis hominis infection in a random sample of apparently healthy food handlers. a total of 415 individuals attending the manoa urban outpatient clinic (caroní municipality, bolívar state, venezuela) in the adult hygiene program and who requested health certification to work as food handlers were studied. stool samples obtained by spontaneous evacuation were examined by direct microscopy and the willis concentration method. a total of 150 individuals were infected (36.14%), 107 (25.78%) of whom with b. hominis. there was no difference between males and females (p > 0.05), but there was a significant difference between ages (c2 = 12.17; g.l. = 4), with infection more frequent between 18 and 27 years. in 71.02% of the cases, b. hominis was the only parasite. giardia lamblia was the parasite most frequently associated with b. hominis (2.41%). in the majority (85%) of infected individuals, less than five microorganisms per microscopic field were observed. we conclude that b. hominis is a frequent intestinal parasite among food handlers in caroní municipality, bolivar state, venezuela.
Coccidios intestinales en ni?os menores de 5 a?os con diarrea: Emergencia pediátrica, Hospital Universitario ?Ruiz y Páez?
Devera,Rodolfo; Blanco,Ytalia; Amaya,Iván; Requena,Ixora; Rodríguez,Yajaira;
Revista de la Sociedad Venezolana de Microbiología , 2010,
Abstract: a study was carried out between august and october 2006 with the purpose of determining the prevalence of intestinal coccidia in children under 5 years of age with diarrhea who attended the pediatric emergency service of the ?ruiz paez? university hospital. a fecal sample obtained from each patient was submitted to the following tests: direct examination, formaldehyde-ether and kinyoun staining. a total of 130 fecal samples obtained from the same number of patients were examined; 60 of the patients were girls (46.2%) and 70 were boys (53.8%), with a mean age of 2 ± 1.4 years. a general prevalence of 38.5% (50/130) intestinal parasites was found. the intestinal coccidia prevalence was 12.3%, and cryptosporidium spp. was the most frequent parasite with 10 cases (7.7%), followed by cyclospora cayetanensis with six cases (4.6%). there were no differences regarding gender (p>0.05) and age (χ2 = 7.41; g.l. = 5) of children with coccidia. coccidia alone were identified in 11 cases, while in other 5 cases the coccidia were associated with other enteroparasites. it was concluded that the prevalence of intestinal coccidia in children with acute diarrhea attending the pediatric emergency service of the ?ruiz paez? university hospital was relatively high (10.9%) and that cryptosporidium was the most frequent coccidia identified
Prevalence of intestinal coccidian in preschool children from San Felix City, Venezuela
Devera,Rodolfo Antonio; Blanco Martínez,Ytalia Yanitza; Requena Certad,Ixora; Figueras,Lucelia Verónica; Femayor,Adriana Carolina;
Revista de la Sociedad Venezolana de Microbiología , 2010,
Abstract: many epidemiological aspects of intestinal coccidiosis in bolivar state are not known. there are no studies done in apparently health children. the purpose of this study was to determine intestinal coccidian prevalence in preschool children attending the s.e.u. teresa de la parra preschool located in san felix, bolivar state, venezuela. the universe included 109 children, and 73 were included in the study. a spontaneous evacuation fecal sample was collected from each child, preserved in 10% formaldehyde, and analyzed by a formaldehyde-ether technique, and kinyoun stain. sixty seven percent of the universe was evaluated (73/109). eighty seven point seven percent of the children were infected by some parasite and/or commensal. ten enteroparasite species were diagnosed, and blastocystis hominis (37%) and giardia lamblia (27.4%) were the most frequent of the protozoa. among the helminthes, the most common were ascaris lumbricoides and trichuris trichiura with 35.6% each. prevalence of intestinal coccidian was 10.9% and cryptosporidium spp. was the only one diagnosed in eight cases (10.9%). the infection did not show any age predilection, but there was a gender bias, since 87.5% of those infected were females. only three of the cases (37.5%) with cryptosporidum spp. had diarrhea. in conclusion, a relative high rate of intestinal coccidiosis in the preschool children evaluated was determined.
?Cuánto cuesta hacer ciencia en venezuela?
Requena,Jaime;
Interciencia , 2003,
Abstract: summary the fraction of its wealth that venezuela dedicates to s&t has been 0.21% of the gnp for the years 1954 to 1999 (or 0.39% of the gnp for the period 1984-1999). within the venezuelan s&t sector, intevep has been the most significant institution, employing 31% of the area resources, followed by 27% in the r&d units of national universities. conicit, the official s&t agency, has consumed 18%. ivic has received 12% of the total; however, in turn, is the institution that has contributed the most to the production of indexed articles with 2685 papers (27 of the national total). in this aspect follow the universities: the universidad central de venezuela with 24%, the universidad de los andes with 16% and the universidad simón bolívar with 14%, while intevep has only produced 3%. the production cost of an indexed publication was calculated, for ivic, at bs 969 thousand (constant with base at year 1984) or its equivalent of about us$ 77,330. for the universidad central de venezuela the calculated unitary cost for indexed piblications was bs 654 thousand (constant with base 1984) and for the universidad simón bolívar it was bs 367 thousand (constant with base 1984). after analyzing the relative weight of the elements that contribute to the calculation of institutional unitary costs, it was concluded that ivic values constitute the best approximation for the venezuelan scientific system. thereafter, a correction factor applicable to national universities was obtained, which could allow the determination of more accurate values for unitary costs, which do not include salaries or services
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