A low-cost intervention for cleaner drinking water in Karachi, Pakistan

Objective: To pilot test an inexpensive, home-based water decontamination and storage system in a low-income neighborhood of Karachi.Methods: Fifty households received a 20-L plastic water storage vessel with a high-quality spout and a regular supply of diluted hypochlorite solution. Twenty-five control households were recruited. Water samples were collected at baseline and during unannounced follow-up visits 1, 3, 6, and 10 weeks later.Results: Baseline drinking water samples among intervention households were contaminated with a mean 9397 colony-forming units (cfu)/100 mL of thermotolerant coliforms compared with a mean 10,990 cfu/100 mL from controls. After intervention the mean concentration of thermotolerant coliforms decreased by 99.8% among the intervention households compared with an 8% reduction among controls. Two years after vessel distribution, 34 (68%) of the families were still using the vessel. Thirteen of the households had stopped using their vessel because it had broken after more than 6 months of use, a pattern most consistent with ultraviolet radiation-induced degradation of the plastic.CONCLUSIONS: In a highly contaminated environment, a specifically designed water storage container and in-home water chlorination was acceptable and markedly improved water quality. Where plastic water vessels will be exposed to substantial sunlight, ultraviolet light stabilizers should be incorporated into the plastic

Elevated blood lead levels among children living in a fishing community, Karachi, Pakistan

Lead is a widespread environmental contaminant worldwide and is associated with adverse outcomes in children, including impaired neurobehavioral development and learning difficulties. A cross-sectional survey of 53 young children was conducted in a fishing village on an island adjacent to Karachi, Pakistan. Whole blood from each individual was tested for lead levels. Also tested were samples of cooked food, house dust, and drinking water from 36 households. Laboratory determinations were made by the Pakistan Council for Scientific and Industrial Research with quality control by the United States Centers for Disease Control and Prevention. Fifty-two subjects (98%) had blood lead levels above 10 microg/dl (mean 21.60 microg/dl), an internationally recognized threshold for potential neurotoxicity. The mean concentration was 3.90 microg/g in cooked food, 4.02 microg/l in drinking water, and 91.30 microg/g in house dust. These findings indicate possible major health concerns and suggest significant environmental contamination in this community as well as the need to identify locally relevant early childhood exposures

Factors associated with elevated blood lead concentrations in children in Karachi, Pakistan

OBJECTIVES: To confirm whether blood lead concentrations in Karachi were as high as reported in 1989 and to identify which types of exposure to lead contribute most to elevated blood lead concentrations in children in Karachi. METHODS: A total of 430 children aged 36-60 months were selected through a geographically stratified design from the city centre, two suburbs, a rural community and an island situated within the harbour at Karachi. Blood samples were collected from children and a pretested questionnaire was administered to assess the effect of various types of exposure. Cooked food, drinking-water and house dust samples were collected from households. FINDINGS: About 80% of children had blood lead concentrations 10 µg/dl, with an overall mean of 15.6 µg/dl. At the 5% level of significance, houses nearer to the main intersection in the city centre, application of surma to children's eyes, father's exposure to lead at workplace, parents' illiteracy and child's habit of hand- to-mouth activity were among variables associated with elevated lead concentrations in blood. CONCLUSION: These findings are of public health concern, as most children in Karachi are likely to suffer some degree of intellectual impairment as a result of environmental lead exposure. We believe that there is enough evidence of the continuing problem of lead in petrol to prompt the petroleum industry to take action. The evidence also shows the need for appropriate interventions in reducing the burden due to other factors associated with this toxic element

Factors associated with elevated blood lead concentrations in children in Karachi, Pakistan.

OBJECTIVES: To confirm whether blood lead concentrations in Karachi were as high as reported in 1989 and to identify which types of exposure to lead contribute most to elevated blood lead concentrations in children in Karachi. METHODS: A total of 430 children aged 36-60 months were selected through a geographically stratified design from the city centre, two suburbs, a rural community and an island situated within the harbour at Karachi. Blood samples were collected from children and a pretested questionnaire was administered to assess the effect of various types of exposure. Cooked food, drinking-water and house dust samples were collected from households. FINDINGS: About 80% of children had blood lead concentrations 10 g/dl, with an overall mean of 15.6 g/dl. At the 5% level of significance, houses nearer to the main intersection in the city centre, application of surma to children's eyes, father's exposure to lead at workplace, parents' illiteracy and child's habit of hand- to-mouth activity were among variables associated with elevated lead concentrations in blood. CONCLUSION: These findings are of public health concern, as most children in Karachi are likely to suffer some degree of intellectual impairment as a result of environmental lead exposure. We believe that there is enough evidence of the continuing problem of lead in petrol to prompt the petroleum industry to take action. The evidence also shows the need for appropriate interventions in reducing the burden due to other factors associated with this toxic element

Determinants of therapeutic injection overuse among communities in Sindh, Pakistan.

BACKGROUND: Unsafe injections including reuse of disposable syringe is very common in developing countries including Pakistan. Healthcare providers unnecessarily prescribe injections to patients suggesting that patients ask for injections. We conducted this qualitative study to determine the reasons of overuse of therapeutic injections by the communities in Sindh province of Pakistan. METHODS: Using field-tested focus group guides of World Health Organization, eighteen focus group discussions (FGDs) were conducted with community members of rural Sindh, peri-urban and urban Karachi during January-February 2001. RESULTS: Injections are overused in Sindh, Pakistan, because patients prefer them, believing that they provide quick relief, and perceive them as a therapeutic norm and standard practice. According to community members initiative of prescription of injections are taken by doctors. Overuse of injections is of particular concern as patients are not aware of the risks associated with reuse of injection equipment. Doctors and television are considered as the most credible source of providing healthcare information. CONCLUSION: There is a need to educate communities regarding rationale use of therapeutic injections. Open discussion and frequent communication between doctors and patient should be encouraged. Mass media could play a vital role in educating communities about risks of unsafe injections

THE EFFECT OF ANTIBACTERIAL SOAP ON IMPETIGO INCIDENCE, KARACHI, PAKISTAN

Abstract. We conducted a study to determine if soap containing 1.2% triclocarban would be effective in reducing the incidence of impetigo. We randomized 162 households in a low-income neighborhood of Karachi, Pakistan, to receive a regular supply of 1.2% triclocarban-containing soap (n ‫ס‬ 81) or an identically appearing placebo (n ‫ס‬ 81); 79 households in a nearby neighborhood were enrolled as standard practice controls. After adjustment for household clustering and covariates, the incidence of impetigo among children living in households receiving triclocarbancontaining soap (1.10 episodes per 100 person-weeks) was 23% lower than in households receiving placebo soap (P ‫ס‬ 0.28) and 43% lower than the standard habit and practice controls (P ‫ס‬ 0.02). The routine use of triclocarban-containing soap by children living in a community with a high incidence of impetigo was associated with a reduced incidence of impetigo. BACKGROUN