Microbial Contamination of Water in Around Dhaka City

Abstract

A total of 109 water samples were collected from around Dhaka city and examined for microbial contamination. Samples were collected in sterilized screw capped glass bottles, transported to the laboratory in cold and processed within 6 hours of their collection. All river water, pond water and household water were found heavily contaminated with coliform, faecal coliform, E. Coli and Salmonella whereas tube well water and bottled water was devoid of faecal coliform, E. Coli and Salmonella. A significant correlation between total number of total coliform and percentage of Salmonella was also investigated. It is suggested that water must be boiled before use.

Microbiological Quality of Local Market Vended Freshly Squeezed Fruit Juices in Dhaka City, Bangladesh

“…From Table III it can be found that faecal contamination and the concomitant presence of Salmonella (in 7.89% of 124 samples) was a cause of concern: it is possible that Salmonella may have gained entry through water because vendors do not use boiled water and WASA water in Dhaka city is highly contaminated (Parveen et al 2008) and this water is commonly used for diluting juices or other ingredients and utensils used for washing and preparing juices, alternately, the possibility of contamination of fruits through improperly treated irrigation water cannot be ruled out; survival and entry of enteropathogens including Salmonella have been shown in crops, irrigated with contaminated sewage (Beuchat, 1998).…”

Quality Assessment of Surface and Drinking Water of Nakla Paurosova, Sherpur, Bangladesh

“…The mean concentration of E. coli was 6.4 × 10 6 cfu/100ml ( Figure 11) and it exceeded the EPA's recommended limit [60]. A study reported that the average concentration of E. coli at pond water of Dhaka city was 2.12 × 10 2 cfu/100ml and also found the presence of E. coli at household water [66]. In our study area, 80% of jar and 50% of tube-well water samples were contaminated with E. coli.…”

“…In the disease-prone, humid, tropical region of Bangladesh, outbreaks of diarrhoeal diseases, often on an epidemic scale, are not unusual and the possible role of water-borne pathogens in these outbreaks has been emphasized due to polluted water with pathogenic microorganisms [14]. Among waterborne diseases of bacterial origin typhoid fever, bacillary dysentery and diarrhea are common in Bangladesh [15] [ 16]. Despite the availability and promotion of the use of safe water sources, water-related diseases remain an important cause of mortality and morbidity in Bangladesh [17].…”

Bacterial Proliferation in Municipal Water Supplied in Mirpur Locality of Dhaka City, Bangladesh

“…and others . In recent years, public health awareness has been increased for the safe supply of water at consumer points . Accordingly, in many developing countries, technical advancement has been brought in the water supply systems with an objective to reduce the incidence of water related diseases within a community .…”