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PubMed1983

Enteropathogen carriage by healthy individuals living in an area with poor sanitation.

Faecal carriage of bacterial enteropathogens (enteropathogenic Escherichia coli (EPEC), shigellae and salmonellae) was studied in 265 individuals: 65 infants 3-6 months of age (50 bottle-fed and 15 breast-fed), 100 school-age children 8-10 years of age and 100 adults 21-50 years of age. All were apparently healthy, did not have gastrointestinal symptoms, had not received antibiotics in the preceding fortnight and were not malnourished. Enteropathogens were isolated from the faeces of 24 individuals (9.1%). Cultures were positive for enteropathogens in 20% of the infants (both breast- and bottle-fed), 8% of school-age children and 3% of the adults. EPEC was the most frequent isolate. Twelve different serotypes were detected. The highest recoveries were E. coli 026:K60 and 044 . K74. Shigella was detected only in school-age children (2%) and salmonella only in adults (1%). Campylobacter jejuni and Yersinia enterocolitica were studied only in the school-age children: there was one isolate of each of them. Most enteropathogens isolated were susceptible to the majority of the antibiotics tested. Only four E. coli strains, isolated from bottle-fed infants, could be considered multi-resistant. Two of the strains wer E. coli 044:K74 and 020a020c:K61. The remainder were E. coli 0111:K58 and wee capable of transferring some of their antibiotic resistance traits to a recipient strain.

Adult↗
PubMed1975

Utensil swab test: its effectiveness in food service sanitation programs.

The effectiveness of the utensil swab test as part of the periodic inspection of food establishments was studied both as an indicator of cleanliness during the period between inspections and as an educational tool. Two to seven samplings were taken at intervals of two to three months at 95 food establishments in rural areas in the northern part of Israel. A statistical analysis showed a high variation and almost no correlation between repeated samplings of the same establishment. Also, no trend to suggest an educational effect was found. We concluded that, though the swab test had proved to be useful in special projects, it had no value as part of the periodic sanitary inspections.

Bacteria↗
PubMed1988

Educational intervention for altering water-sanitation behavior to reduce childhood diarrhea in urban Bangladesh: impact on nutritional status.

We evaluated whether an educational intervention that was effective in reducing childhood diarrhea also improved childhood nutritional status. Fifty-one communities of 38 families each were randomized to receive the intervention or no intervention. During 1 y of follow-up the rate of diarrhea (per 100 wk) in children less than 6 y in the intervention group was 5.89 episodes whereas that in the nonintervention group was 7.55 episodes (protective efficacy 22%; p less than 0.0001). During the same follow-up period children in both groups exhibited comparable patterns of weight gain; 1 y after the intervention the mean weight for age of children in both groups was 76% of the NCHS standard. No significant differences were observed in the proportion of each group that experienced a major deterioration or improvement of nutritional status. We conclude that an intervention that reduces rates of childhood diarrhea may not necessarily also improve nutritional status.

Bangladesh↗
PubMed1983

Measuring the impact of water supply and sanitation investments on diarrhoeal diseases: problems of methodology.

A review of the published literature on the impact of water supply and/or excreta disposal facilities on diarrhoeal diseases, or on infections related to diarrhoea, reveals several methodological problems that hamper the drawing of definitive conclusions from these studies. This paper examines eight of these methodological problems: lack of adequate control, the one to one comparison, confounding variables, health indicator recall, health indicator definition, failure to analyse by age, failure to record usage, and the seasonality of impact variables. It is suggested that an evaluation of the impact on health of environmental interventions may best be undertaken by the combined efforts of engineers, social scientists and epidemiologists in 'opportunistic' settings and that the intervening behavioural processes so necessary for health impact to occur should be a primary focus of such evaluations.

Age Factors↗
PubMed1988

Water supply, sanitation and housing in relation to the risk of infant mortality from diarrhoea.

In a population-based case-control study in the metropolitan areas of Porto Alegre and Pelotas in southern Brazil children dying in infancy from diarrhoea were compared to neighbourhood controls in terms of several social and environmental variables. Factors found to be significantly associated with an increased risk of death from diarrhoea included the non-availability of piped water, the absence of a flush toilet, residence in a poorly built house and household overcrowding. When adjustment was made for confounding variables and the mutual confounding effect of the environmental variables on each other, the only association that remained statistically significant was that with the availability of piped water. The association with poor housing was almost significant (p = 0.052). Compared to those with water piped to their house, those without easy access to piped water were found to be 4.8 times more likely to suffer infant death from diarrhoea (95% confidence interval 1.7 to 13.8) and those with water piped to their plot but not to their house had a 1.5 times greater risk (95% confidence interval 0.8 to 3.0).

Brazil↗