Archivos de investigacion medica最新文献_第5页

Isolation and axenization of Giardia lamblia isolates from symptomatic and asymptomatic patients in Mexico. 墨西哥有症状和无症状患者的兰第鞭毛虫分离株的分离和灭虫。

Archivos de investigacion medica Pub Date : 1991-01-01

R Cedillo-Rivera, J A Enciso-Moreno, A Martínez-Palomo, G Ortega Pierres

{"title":"Isolation and axenization of Giardia lamblia isolates from symptomatic and asymptomatic patients in Mexico.","authors":"R Cedillo-Rivera, J A Enciso-Moreno, A Martínez-Palomo, G Ortega Pierres","doi":"","DOIUrl":"","url":null,"abstract":"Infection of the small intestine of humans with the parasitic protozoan Giardia lamblia may have an asymptomatic course, or else, may produce acute or chronic diarrhea. In order to establish if the different clinical outcome of giardiasis in children could be due, at least partially, to strain differences, isolates from asymptomatic and symptomatic cases studied in Mexico City during 1986 and 1987 were cultured under axenic conditions. With modifications of available methods for the isolation of G. lamblia from cysts in stools, we obtained 19 axenic isolates: 5 from symptomatic patients and 14 from asymptomatic cyst carriers. The isolation procedure involved: (1) concentration and cleaning of cysts through centrifugation in sucrose gradients; (2) excystment induction in acid solution; (3) culture in modified TYI-S-33 medium, and (4) axenization of isolates using ceftriaxone and Amphotericin B. Results indicate that isolates from carriers and from symptomatic cases of giardiasis are equally amenable to isolation and axenization. The Giardia isolates obtained are being studied to analyze differences in isoenzyme pattern, antigenicity, and molecular markers.","PeriodicalId":75554,"journal":{"name":"Archivos de investigacion medica","volume":"22 1","pages":"79-85"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12983026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Medical causes and effects of cocaine abuse. 可卡因滥用的医学原因和影响。

Archivos de investigacion medica Pub Date : 1991-01-01

R Barroso-Moguel, J Villeda-Hernández, M Méndez-Armenta

引用次数: 0

Low Toxoplasma antibody prevalence in serologic surveys of humans in southern Mexico. 墨西哥南部人类血清学调查中弓形虫抗体流行率低。

Archivos de investigacion medica Pub Date : 1991-01-01

R S Goldsmith, I G Kagan, R Zárate, M A Reyes-González, J Cedeno-Ferreira

{"title":"Low Toxoplasma antibody prevalence in serologic surveys of humans in southern Mexico.","authors":"R S Goldsmith, I G Kagan, R Zárate, M A Reyes-González, J Cedeno-Ferreira","doi":"","DOIUrl":"","url":null,"abstract":"Antibody prevalence to Toxoplasma gondii among residents of a Pacific coastal region of Oaxaca State, Mexico is among low rates reported worldwide. From 60 small, rural communities, 3229 persons from ages 6 months to over 70 years provided blood specimens that were stored on filter papers. 124 (3.8%) of the eluates were seropositive (positive titer greater than 1:256) in the indirect hemagglutination test, and 43 (1.3%) had titers greater than 1:1024. Seropositive rates increased by age group and females were positive twice as often as males. There was no difference in rates for persons who lived at sea level, compared to those who lived between 600 and 1800 meters. In two small communities in which the number of persons tested were a large percentage of the total population, seropositive rates were 1.0 and 1.9%, respectively. The probable explanation for these low rates is the near absence of cats and paucity of meat in the diet. By contrast, sera tested from 479 persons living about 150 km to the east in the coastal, urban towns of Tehuantepec of Salina Cruz showed positive reactions among 122 (125.5%), and 71 (14.8%) had titers less than 1:1024. These people had a higher standard of living, more meat in their diet, and a few cats.","PeriodicalId":75554,"journal":{"name":"Archivos de investigacion medica","volume":"22 1","pages":"63-73"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12981659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Campimetric alterations caused by pituitary microadenoma successfully treated by transsphenoidal adenomectomy. 经蝶窦腺瘤切除术成功治疗垂体微腺瘤引起的弧度改变。

Archivos de investigacion medica Pub Date : 1991-01-01

I Madrazo-Navarro, J A Maldonado-León

引用次数: 0

Experimental study of the hypoglycemic effect of some antidiabetic plants. 几种抗糖尿病植物降血糖作用的实验研究。

Archivos de investigacion medica Pub Date : 1991-01-01

R Román-Ramos, J L Flores-Sáenz, G Partida-Hernández, A Lara-Lemus, F Alarcón-Aguilar

引用次数: 0

Influence of nopal intake upon fasting glycemia in type II diabetics and healthy subjects. nopal摄入对II型糖尿病患者和健康人空腹血糖的影响。

Archivos de investigacion medica Pub Date : 1991-01-01

A C Frati, B E Gordillo, P Altamirano, C R Ariza, R Cortés-Franco, A Chávez-Negrete, S Islas-Andrade

引用次数: 0

Colonization by Clostridium difficile in hospitalized children: risk factors and typification of the isolated strains. 艰难梭菌在住院儿童中的定植:分离菌株的危险因素和分型。

Archivos de investigacion medica Pub Date : 1991-01-01

M Camorlinga, O Muñoz, H Guiscafré, J Torres

{"title":"Colonization by Clostridium difficile in hospitalized children: risk factors and typification of the isolated strains.","authors":"M Camorlinga, O Muñoz, H Guiscafré, J Torres","doi":"","DOIUrl":"","url":null,"abstract":"The frequency of colonization by Clostridium difficile in 273 hospitalized children under 15 years of age was studied. Feces were collected from patients attending the infectious disease service at the Pediatric Hospital IMSS, during a period of 11 months. No colonization was detected in 16 neonates; whereas 10 of 103 children (9.7%) under one year of age, 7 of 84 children (8.3%) from one to five years and 3 of 70 children (4.2%) from five to 15 years of age were colonized. The use of antibiotics and the nutritional state were studied as possible risk factors for colonization. The frequency of colonization was not influenced by the nutritional state, whereas the treatment with antibiotics decreased significantly the colonization in children under one year of age but not in those children over one year of age. In children under one year of age, the cytotoxin was more frequent in cases of diarrhea, and in those over one year no association was found. The 50 strains isolated from these children were classified according to: toxigenicity, sensitivity to antibiotics, phages and bacteriocins. Strains acquired before hospitalization were more toxigenic than those acquired intrahospital. Twelve resistotypes were detected; one of them (V) was more frequent in intrahospital strains. Ten phagobacteriocin types were found, and two of then (D and I) were present only in intrahospital strains. Using this classification scheme, it was found that eight patients were colonized with two different strains at the same time.","PeriodicalId":75554,"journal":{"name":"Archivos de investigacion medica","volume":"22 1","pages":"19-26"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12981653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polyclonal activation of B lymphocytes in patients with amoebic hepatic abscess. 阿米巴性肝脓肿患者B淋巴细胞的多克隆活化。

Archivos de investigacion medica Pub Date : 1991-01-01

F Castañeda-Ibarra, L Ruíz-Maya, R Campos-Rodríguez, E García Latorre

引用次数: 0

Randomized study for the treatment of advanced Hodgkin's disease: MOPP vs. LOPP. 治疗晚期霍奇金病的随机研究:MOPP与LOPP。

Archivos de investigacion medica Pub Date : 1991-01-01

A Avilés, J C Díaz-Maqueo, E L García, V Torras, D López-Vancell

引用次数: 0

Changes in manganese and small cobalt blood levels of lead-exposed workers. 铅暴露工人血液中锰和小钴含量的变化。

Archivos de investigacion medica Pub Date : 1991-01-01

J Saavedra-Contreras, C Ríos

引用次数: 0