| retention of escherichia coli, giardia lamblia cysts and ascaris lumbricoides eggs in agricultural soils irrigated by untreated wastewater. | in central mexico, agricultural irrigation reusing mexico city's municipal wastewater has been occurring for the last century, resulting in the recharge of the local aquifer. however, groundwater of this zone is of good quality, indicating that the microorganisms contained in wastewater are retained by soil after infiltration. this study aims to assess the capacity of three agricultural soils to retain three microorganisms frequently found in wastewater, namely escherichia coli (e. coli), giardi ... | 2013 | 23722173 |
| 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 |
| cryptosporidiosis and other intestinal protozoan infections in children less than one year of age in mexico city. | parasitic diseases are very important in mexico because of their economic impact and adverse effects on normal growth in children. cryptosporidiosis has been associated with acute diarrhea in immune competent and incompetent human hosts, fecal contamination of drinking water sources, and handling of animals. due to the lack of reports on cryptosporidiosis in mexico, we conducted a parasitologic study in children with diarrhea and other clinical symptoms. the main objectives were 1) to determine ... | 2006 | 17172373 |
| giardia intestinalis and other zoonotic parasites: prevalence in adult dogs from the southern part of mexico city. | the protozoan giardia intestinalis is a mammalian-infecting parasite. it produces diarrhoea and malabsorption in its hosts. there is growing evidence that dogs could be reservoirs and play an important role in transmission. in mexico, there are few data on the frequency of g. intestinalis. therefore, we studied the small intestine of stray dogs, euthanazed at the "culhuacan" control canine centre, towards the end of 1997 and during the summer of 1998. we microscopically analysed intestinal conte ... | 2005 | 15927399 |
| interaction of zinc or vitamin a supplementation and specific parasite infections on mexican infants' growth: a randomized clinical trial. | the efficacy of micronutrient supplementation on growth may be modified by specific gastrointestinal parasite infections. | 2009 | 19623197 |
| risk of giardia intestinalis infection in children from an artificially recharged groundwater area in mexico city. | the objective of this study was to assess the risk of infection with giardia intestinalis in children living in an area with artificial groundwater recharge and potable water reuse in mexico city. eligible wells and surrounding homesteads were defined by using a geographic information system. five wells were tested for g. intestinalis cysts per 400 liters of water. a total of 750 eligible households were visited during two cross-sectional surveys. stool samples were provided by 986 children in t ... | 2004 | 15238691 |
| genetic homogeneity of axenic isolates of giardia intestinalis derived from acute and chronically infected individuals in mexico. | twenty-six axenic isolates of giardia intestinalis, established in mexico city over an 11-year period from symptomatic and asymptomatic individuals with acute or chronic infections, were typed genetically. a segment of the glutamate dehydrogenase gene was amplified by pcr and examined by restriction analysis using bsph1 and apai to determine the major genetic assemblages to which the isolates belonged. this was coupled with the amplification and analysis of segments of variant-specific surface p ... | 2003 | 12756545 |
| [clinical aspects of hymenolepiasis in pediatrics]. | the present integral clinical and laboratory study was carried out in 325 children infected with hymenolepis nana. results showed that h. nana is found among the top five intestinal parasitosis in school children in mexico city, in the majority of the cases associated with protozoans and other helminths, especially and with giardia lamblia. although the amount of parasites found is small, the clinical manifestations vary very little with larger amounts. the most important and more constant clini ... | 1991 | 2054081 |
| isolation and axenization of giardia lamblia isolates from symptomatic and asymptomatic patients in mexico. | 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 ... | 1991 | 1819980 |
| protection against infection with giardia lamblia by breast-feeding in a cohort of mexican infants. | to determine whether breast-feeding protects infants against symptomatic and asymptomatic infection by giardia lamblia, we followed 197 infants in a poor area of mexico city from birth to 18 months of age; symptoms and feeding status were recorded weekly. stool specimens were collected every 1 to 2 weeks and tested for giardia by enzyme-linked immunosorbent assay. a mean of 1.0 giardia infection per child-year was detected; 94 infants had a total of 139 infections; 17% of infections were symptom ... | 1992 | 1517909 |
| 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 |
| pathogenic and free-living protozoa cultured from the nasopharyngeal and oral regions of dental patients: ii. | protozoa of the nose, mouth, and pharynx of 30 randomly chosen male caries patients at an odontological clinic of the national autonomous university of mexico, in mexico city, were surveyed by culture from swabs. culture tubes from swabs were observed every other day for 5 weeks. pathogens found included entamoeba histolytica, naegleria fowleri, acanthamoeba castellanii, a. culbertsoni, a. polyphaga, and giardia lamblia. such isolations of pathogens suggest that patients may be healthy carriers ... | 1986 | 3956463 |
| giardia lamblia: isoenzyme analysis of 19 axenic strains isolated from symptomatic and asymptomatic patients in mexico. | infection of the small intestine of humans with the parasitic protozoon giardia lamblia may have an asymptomatic course, or it may produce acute or chronic diarrhoea. in order to establish if the different clinical outcome of giardiasis in children could be due, at least partially, to strain differences, 19 isolates from asymptomatic and symptomatic cases studied in mexico city were cultured under axenic conditions and the isoenzyme electrophoretic patterns of 10 different enzymes were compared. ... | 1989 | 2533417 |
| impact of vitamin a on selected gastrointestinal pathogen infections and associated diarrheal episodes among children in mexico city, mexico. | the overall effect of vitamin a supplementation on diarrheal disease in community trials may result from its effect on specific diarrheal pathogens. | 2006 | 17041847 |