| antibiotic resistance and phage-types of salmonella typhi strains isolated in mexico city. | | 1978 | 286394 |
| [search for salmonella carriers among different population groups in mexico city]. | | 1979 | 293005 |
| travelers' diarrhea in mexico. a prospective study of physicians and family members attending a congress. | we conducted a prospective study of travelers' diarrhea on 73 physicians and 48 family members attending a medical congress in mexico city, in october, 1974. fecal and blood specimens were collected before, during and after their visit and examined for enteric bacterial pathogens, viruses and parasites. in 59 (49 per cent) participants travelers' diarrhea developed. median duration of illness was five days. onset occurred a median of six days after arrival. an etiologic agent was found in 63 per ... | 1976 | 772435 |
| [hygenic quality of the cream sold by mobile markets in the federal district of mexico. study of 95 samples]. | | 1975 | 1243203 |
| risk of diarrhea during the first year of life associated with initial and subsequent colonization by specific enteropathogens. | the incidence of colonization by enteropathogenic, enterotoxigenic, enteroinvasive, and enterohemorrhagic escherichia coli (detected by dna hybridization with specific radiolabeled probes), salmonella sp., shigella sp., campylobacter jejuni, and rotavirus was related to the presence of diarrhea in a cohort of 75 rural infants followed longitudinally during the first year of life. the study was carried out between august 1985 and february 1987 in the village of lugar sobre la tierra blanca, in th ... | 1990 | 2157338 |
| [a 10-year prolective study on cancer of the digestive system]. | a ten year prolective and multicentre study of cancer of the digestive tract aims to evaluate the variations on frequency and to identify risk factors. | 1990 | 2291062 |
| [sanitary control of food in mexico city]. | this work was undertaken as to avoid health risks to tourism in the "xiith soccer world cup, mexico 86". the above project was carried out through proper quality control of foods, drinking water as well as a definite care of personal hygiene of all those involved in the catering business (132 restaurants were included). the mentioned report informs only of the work of the national public health laboratory in the sanitary epidemiological program. the following products were analyzed: 133 water sa ... | 1989 | 2711259 |
| [sanitary quality of ham eaten in mexico city]. | microbiological results of 2,539 hams were analyzed (counts of mesophilic aerobes, salmonella sp. and s. aureus) at the national public health laboratory from 1979 to 1987. in 58.7 percent of the cases the hams were not acceptable for human consumption, due to any of the above mentioned microbiological determinations. the main cause was the finding of high levels of mesophilic aerobes (57.5%), followed by salmonella sp (4.4%) and s. aureus (0.43%). raw, cooked and smoked hams presented the highe ... | 1989 | 2772735 |
| asymptomatic rotavirus infections in day care centers. | rotaviruses and other enteropathogenic agents were detected in 288 (42.1%) of 684 children in day care centers of instituto politecnico nacional in mexico city. the same agents were also found in 114 (37.7%) of 302 adults directly involved in the care of the children. the study was carried out from july to december 1982 and from july 1983 to february 1984. rotaviruses were the main enteropathogenic agents found and were detected in 169 (29.9%) of 564 children without diarrhea and in 34 (28.3%) o ... | 1985 | 2991328 |
| typhoid fever imported from mexico to switzerland. studies on r factor mediated chloramphenicol resistance. | a case of typhoid fever caused by salmonella typhi occurred in geneva. the patient was probably infected in mexico city. the strain isolated from this patient corresponds with the description of the mexican s. typhi strain, since it is a degraded vi-strain resistant to chloramphenicol, streptomycin, sulphonamides and tetracyclines. it carried an fi(-) transferable r factor with a cssut resistance pattern. it can be accepted that this case forms part of the mexican outbreak of chloramphenicol-res ... | 1973 | 4518350 |
| salmonella typhi resistant to chloramphenicol, ampicillin, and other antimicrobial agents: strains isolated during an extensive typhoid fever epidemic in mexico. | during 1972 a large epidemic, in excess of 10,000 cases, of typhoid fever occurred in mexico city, pachuca, and other communities of mexico. the main characteristic of the epidemic, in addition to the large number of persons affected, was the prevalence of a strain of salmonella typhi which was highly resistant to chloramphenicol both in vivo and in vitro, and which belonged to a single phage type, vi degraded approaching type a. of 493 strains of s. typhi studied during the outbreak, 452 (91.7% ... | 1973 | 4602828 |
| [1st report on the search for carriers of salmonella in 7,436 feces samples from residents of mexico city]. | | 1972 | 4650277 |
| failure to find cholera and noncholera vibrios in diarrheal disease in mexico city, 1966-67. | | 1971 | 4943476 |
| [salmonellas isolated from the intestines of goats in the environs of mexico city]. | | 1970 | 5530662 |
| campylobacter jejuni in children with diarrhea in mexico city. | the frequency of campylobacter jejuni infection in children under 4 years of age, with and without diarrhea, attending the hospital infantil de mexico was studied. campylobacter was cultured from rectal swabs in 23 (8.7%) of 265 children with diarrhea, with the highest isolation rate in the 7- to 12-month age group, and in 2 (4%) of 54 children without diarrhea. from 5 (22%) of the children infected with campylobacter, salmonella or shigella sp. were simultaneously cultured. major clinical featu ... | 1983 | 6835851 |
| mutagenic activity of urban air samples and its modulation by chili extracts. | different samples of ambient particulate organic matter were collected during the summer and winter of 1990 in mexico city. after dichloromethane extraction, the samples were tested for mutagenicity with derivatives of salmonella typhimurium possessing high activity of 'classical' nitroreductase (yg1021) or o-acetyltransferase (yg1024), and compared to the mutagenicity of the normal strain yg1020, and to that of a nitroreductase-deficient mutant ta98nr. the two enzyme-overproducing strains were ... | 1993 | 7692278 |
| cryptosporidium infections in mexican children: clinical, nutritional, enteropathogenic, and diagnostic evaluations. | using an indirect immunofluorescence assay on stool samples, we found a 6.4% prevalence of cryptosporidiosis among 403 children less than five years of age with acute diarrhea in mexico city over a one-year period. the prevalence was highest (11.4%) during the rainy summer months. most cryptosporidium parvum cases occurred in infants less than one year of age. cryptosporidium parvum was more common in malnourished children (p < 0.05) and in nonbreast-fed infants less than six months of age (p < ... | 1997 | 9129526 |
| salmonella gastroenteritis outbreak among workers from a tertiary care hospital in mexico city. | to describe an outbreak of salmonella gastroenteritis among employees of the national institute of nutrition (innsz) of mexico city during july, 1994. | 1997 | 9428187 |
| [trends for bacteremia and risk factors for death in a tertiary hospital in mexico city. 1981-1992]. | to describe the trends and risk factors of death for bacteremia in adult from a tertiary-care center from 1981 to 1992. | 2001 | 11432088 |
| removal of microorganisms in different stages of wastewater treatment for mexico city. | in this study the removal of a diversity of microorganisms during different stages of treatment was evaluated. the process scheme consisted of advanced primary treatment (apt), sand filtration, and chlorine disinfection. during the first 2 stages, fecal coliforms were reduced from 1.24 x 10(9) to 1.2 x 10(8) mpn/100 ml and helminth ova were reduced to less than 1 ova/l. nevertheless, to obtain an effluent water quality that meets the microbiological standards recommended by the world health orga ... | 2001 | 11436775 |
| [an outbreak of salmonella gastroenteritis among hospital workers]. | to describe and identify the causes of an outbreak of salmonella enteritidis gastroenteritis that took place in june 1998, among tertiary care hospital workers, in mexico city. | 2001 | 11452697 |
| prevalence of escherichia coli and salmonella spp. in street-vended food of open markets (tianguis) and general hygienic and trading practices in mexico city. | street-vendors in mexico city provide ready-to-eat food to a high proportion of the inhabitants. nevertheless, their microbiological status, general hygienic and trading practices are not well known. during spring and summer 2000, five tianguis (open markets) were visited and 48 vendors in 48 stalls interviewed. a total of 103 taco dressings were sampled for e. coli and salmonella spp.: 44 (43%) contained e. coli and 5 (5%) salmonella (2 s. enteritidis phage type 8, 1 s. agona, 2 s. b group). bo ... | 2004 | 15635978 |
| microbiological determinations of some vegetables from the xochimilco zone in mexico city, mexico. | vegetables intake is widely recommended because of its high content of vitamins, minerals and fiber. however, the irrigation of these vegetables, using wastewaters that have received inadequate treatment often carries unseen microbial pollution that becomes a high risk potential for humans. in the present research, two of the most consumed fresh vegetables cultivated in mexico city were analyzed, lettuce (lactuca sativa) and mexican coriander (eryngium foetidum). these vegetables are commonly co ... | 2002 | 17061512 |
| biodirected mutagenic chemical assay of pm(10) extractable organic matter in southwest mexico city. | the concentration of breathable particles (pm(10)) in urban areas has been associated with increases in morbidity and mortality of the exposed populations, therein the importance of this study. organic compounds adsorbed to pm(10) are related to the increased risk to human health. although some studies have shown the lack of correlation between specific mutagenic compounds in an organic complex mixture (ocm) and the mutagenic response in several bioassays, the same organic compounds selectively ... | 2007 | 17720617 |
| two or more enteropathogens are associated with diarrhoea in mexican children. | diarrhoeal diseases constitute a major public health problem, particularly in the developing world, where the rate of mortality and morbidity is very high. the purpose of this study was to conduct a 2 years and 3 months study in order to determine the prevalence of five enteropathogen diarrheogenic agents in mexico city. | 2007 | 18162140 |
| microbiological implications of periurban agriculture and water reuse in mexico city. | recycled treated or untreated wastewater represents an important health challenge in developing countries due to potential water related microbiological exposure. our aim was to assess water quality and health implications in a mexico city periurban agricultural area. | 2008 | 18509453 |
| bacille calmette-guérin infection and disease with fatal outcome associated with a point mutation in the interleukin-12/interleukin-23 receptor beta-1 chain in two mexican families. | patients with mendelian susceptibility to mycobacterial diseases (msmd) mainly suffer from mycobacterium and salmonella infections, which are due to mutations in genes controlling the interleukin (il)-12/il-23-dependent ifn-γ production. we performed a molecular diagnosis in two mexican patients with persistent mycobacterial infections. patients 1 (p1) and 2 (p2) from two unrelated, non-consanguineous families from two villages near mexico city developed bacille calmette-guérin (bcg) disease sec ... | 2010 | 20171917 |