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Elevada prevalencia de Cyclospora cayetanensis en indígenas del estado Bolívar, Venezuela
Devera, Rodolfo;Blanco, Ytalia;Cabello, Eva;
Cadernos de Saúde Pública , 2005, DOI: 10.1590/S0102-311X2005000600025
Abstract: the intestinal coccidioses caused by cryptosporidium parvum, isospora belli, and cyclospora cayetanensis are parasitoses of major medical importance, but many epidemiological aspects of these infections are still unknown in bolívar state, venezuela. to determine the prevalence of intestinal parasites and especially of intestinal coccidiosis, an indigenous population in san antonio de morichal was evaluated from july 2003 to april 2004. stool samples obtained by spontaneous evacuation were preserved in potassium dichromate 2.5% and examined by the formalin-ether concentration method and kinyoun staining. of the 160 indigenous people examined, 92.5% (148 cases) were infected. entamoeba coli (58.8%), ascaris lumbricoides (38.8%), and giardia lamblia (18.8%) were the most prevalent intestinal parasites. coccidiosis prevalence was 13.1%, and cyclosporiasis was the most prevalent with 11.9% (19 cases). one subject with c. parvum oocysts and another with i. belli oocysts were diagnosed. there was no difference according to sex (p > 0.05) and age (c2 = 5.6; f.g. = 6) among individuals infected with c. cayetanensis. of these, two cases had only diarrhea. in conclusion, a high prevalence of intestinal coccidiosis infection was found among indigenous people from this community, with c. cayetanensis as the most prevalent infection.
Parásitos intestinales en lechugas comercializadas en mercados populares y supermercados de Ciudad Bolívar, Estado Bolívar, Venezuela
Devera,Rodolfo; Blanco,Ytalia; González,Hecmil; García,Lisdet;
Revista de la Sociedad Venezolana de Microbiología , 2006,
Abstract: the aim of this study was to evaluate the parasitological contamination of lettuce (lactuca sativa) commercially sold in ciudad bolivar, bolivar state, venezuela. we studied 102 samples of this vegetable (roman, american and native types) from four locals: two supermarkets (i and ii locals), one greengrocer shop (local iii), and one popular market (local iv). each lettuce obtained was submitted to two consecutives washing with sterile distillated water, filtrated and submitted to spontaneous sedimentation for 24 hours and microscopic examination of sediment. also, it was processed by formol-ether method and kinyoun staining. of a total 102 samples, 53.9% were positive for parasitic structures with morphological aspects similar to those of human parasites. the parasites more frequently detected were blastocystis hominis (21.6%), intestinal coccidians (16.7%) and strongyloides stercoralis (15.7%). there was no differences between lettuce types and local of commercially sold and detection of parasitic forms. we concluded that high contamination percentage determine a risk of human infection between consumers of lettuce in ciudad bolívar. we suggest greater enforcement in the sanitary surveillance of this vegetable offered to the population.
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.
Parásitos intestinales en inmigrantes de la República Popular China residentes en Ciudad Bolívar, Venezuela INTESTINAL PARASITES AMONG IMMIGRANTS FROM CHINA POPULAR REPUBLIC LIVING IN CIUDAD BOLIVAR, VENEZUELA
YTALIA BLANCO,LINDARLING GUERRERO,LUISANA HERRERA,IVAN AMA YA
Parasitología latinoamericana , 2007,
Abstract: El objetivo de este estudio fue determinar la prevalencia de parásitos intestinales en inmigrantes chinos que trabajan en comercios y restaurantes de Ciudad Bolívar, Venezuela. Entre agosto y septiembre de 2005 se evaluaron 76 muestras fecales, mediante la técnica de examen directo, los métodos de concentración de Kato, Formol-éter y coloración de Kinyoun. Este grupo fue pareado de acuerdo a la edad y el sexo con 76 residentes autóctonos de Ciudad Bolívar formando así un grupo control. La prevalencia general de parasitosis fue de 75% en los inmigrantes y de 65,8% en el grupo control. En ambos grupos, los protozoarios fueron más frecuentes que los helmintos y Blastocytis hominis fue el parásito intestinal más común. Entre los inmigrantes se diagnosticó un caso (1,3%) de Clonorchis sinensis, parásito endémico del continente Asiático. Se concluye que existe una elevada prevalencia de parásitos intestinales en la población de inmigrantes chinos de Ciudad Bolívar, sin embargo, fue similar a la determinada en la población general autóctona de Ciudad Bolívar The object of this study was to determine the prevalence of intestinal parasites in Chinese immigrants who worked in commerce and restaurants in Ciudad Bolivar city, Venezuela. 76 stool samples of equal number of Chinese immigrants were evaluated, between August and September 2005, by means of direct examination technique, Kato, Formol-Ether concentration methods and Kinyoun coloration. This group was matched up according to age and sex with 76 native residents of Ciudad Bolivar forming therefore a group control. The general prevalence of parasitism was of 75% in the immigrants and 65.8% in the group control, without differences statistically significant. In both groups, the protozoan were more frequent than the Helminthes, and Blastocystis hominis was the most common intestinal parasite. It's worth emphasizing that the finding of a case (1.3%) of Clonorchis sinensis, endemic parasite of the Asian continent, among the immigrants. It is concluded that there is a high prevalence of intestinal parasites in the population of Chinese immigrants in Ciudad Bolivar; nevertheless, this was similar to that one determined in the general native population of the city
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
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.
Parásitos intestinales en inmigrantes de la República Popular China residentes en Ciudad Bolívar, Venezuela
BLANCO,YTALIA; GUERRERO,LINDARLING; HERRERA,LUISANA; AMA YA,IVAN; DEVERA,RODOLFO;
Parasitología latinoamericana , 2007, DOI: 10.4067/S0717-77122007000100007
Abstract: the object of this study was to determine the prevalence of intestinal parasites in chinese immigrants who worked in commerce and restaurants in ciudad bolivar city, venezuela. 76 stool samples of equal number of chinese immigrants were evaluated, between august and september 2005, by means of direct examination technique, kato, formol-ether concentration methods and kinyoun coloration. this group was matched up according to age and sex with 76 native residents of ciudad bolivar forming therefore a group control. the general prevalence of parasitism was of 75% in the immigrants and 65.8% in the group control, without differences statistically significant. in both groups, the protozoan were more frequent than the helminthes, and blastocystis hominis was the most common intestinal parasite. it's worth emphasizing that the finding of a case (1.3%) of clonorchis sinensis, endemic parasite of the asian continent, among the immigrants. it is concluded that there is a high prevalence of intestinal parasites in the population of chinese immigrants in ciudad bolivar; nevertheless, this was similar to that one determined in the general native population of the city
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
Protozoarios en cavidad bucal de escolares de Ciudad Bolívar, estado Bolívar, Venezuela
Devera,Rodolfo; Blanco,Ytalia; Amaya,Iván; Rojas,Mileidys; Torrealba,Marlin;
Revista de la Sociedad Venezolana de Microbiología , 2010,
Abstract: a study of 105 supragingival dental biofilm samples taken from the same number of students of the ?blanca sosa de vargas? bolivarian state educational unit of ciudad bolivar was done with the purpose of determining the prevalence of entamoeba gingivalis and trichomonas tenax. the samples were analyzed through direct examination, sediment examination and trichrome staining techniques. entamoeba gingivalis was the only protozoa diagnosed in 32 of the samples. there was no difference in relation to gender and age of the infected students (p>0.05). the protozoa were diagnosed in children with and without caries and there were no statistically significant differences. in conclusion, a 30.5% prevalence of e. gingivalis was determined in dental biofilm samples from the population studied
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