Microbiological Quality of Drinking Water from Dispensers in Roadside Restaurants of Bangladesh

Abstract

The microbiological status of water from dispensers in different roadside restaurants of Dhaka city and Savar area was analyzed in this study. Seven samples from Dhaka and 8 samples of Savar were checked. The heterotrophic plate count was in a range of 1.0 x 10(3) CFU mL(-1) to 2.0 x 10(4) CFU mL(-1) (from new bottles), 1.0 x 10(3) to 1.5 x 10(4) CFU mL(-1) (after dispensation), and 1.5 x 10(3) CFU mL(-1) to 1.0 x l0(5) CFU mL(-1) (from serving glass). In several of the samples, the heterotrophic plate count was higher than the count in water from new bottle or after dispensation, suggesting added contamination from the serving glass. 80% of the samples were contaminated with total and fecal coliform bacteria, which render these waters unacceptable for human consumption. The samples were found to contain gram negative bacteria like E coli, Shigella sp., Klebsiella sp., Enterobacter sp., Pseudomonas sp., and Salmonella sp., which are potential pathogens and thus pose a serious threat to public health. This study elucidates the importance of monitoring the bottling companies and the restaurants and put them under strict regulations to prevent future outbreak of any water borne diseases caused by consumption of dispensed water.

Microbiological Quality and Antibiogram of E. coli, Salmonella and Vibrio of Salad and Water from Restaurants of Chittagong

“…The samples were found to contain gram negative bacteria like E. coli, Shigella spp., Klebsiella spp., Enterobacter spp., Pseudomonas spp., and Salmonella spp., which are potential pathogens and thus pose a serious threat to public health (Moniruzzaman et al, 2011).Although coliform organisms may not always be directly related to the presence of fecal contamination, the presence of coliforms in water suggested the potential presence of pathogenic enteric microorganisms such as Salmonella sp., Shigella sp., and Vibrio cholerae (Zamberlan da Silva et al, 2008). According to WHO (Anonymous, 2006), the bacteria that pose a serious disease risk whenever present in drinking water include Salmonella sp., pathogenic E. coli and Vibrio cholerae.…”

Coliform contamination on faucet surface of water vending machines in Klang Valley

“…Although the presence of faecal coliform in water supply may not be harmful, but it is an indication of the presence of faeces [49] . Despite cases of water vending machines contaminated by faecal coliforms (E. coli O157:H7) [50] , fortunately, none of the selected subjects in this study was found to harbour faecal coliform (Figure 1, Table 3). However, in accordance to other studies [51,52] ,the presence of other total coliform (eg.…”

Study of Long-Term Effectiveness of Water Safety Plan Applied to Microfiltered Water Dispensers to Improve Water Quality

“…In an another study, from 2014, the heterotrophic bacterial load was shown above the acceptable limits in drinking water, significantly higher in water dispenser samples than tap water samples [20]. Moniruzzaman et al 2011 carried out a study about the microbiological contamination (heterotrophic bacteria, Escherichia coli, Pseudomonas sp., and Salmonella sp.) in water samples dispensed in road-side restaurants compared to water samples from the bottle before dispensing [21].…”

“…Moniruzzaman et al 2011 carried out a study about the microbiological contamination (heterotrophic bacteria, Escherichia coli, Pseudomonas sp., and Salmonella sp.) in water samples dispensed in road-side restaurants compared to water samples from the bottle before dispensing [21]. In Italy, Liguori et al 2010 andSacchetti et al 2014 conducted studies to compare the microbial quality of water dispensers and municipal tap water [2,9].…”