Fecal indicators and bacterial pathogens in bottled water from Dhaka, Bangladesh
Braz. j. microbiol
;
44(1): 97-103, 2013. tab
Article
in English
| LILACS
| ID: lil-676899
ABSTRACT
Forty-six bottled water samples representing 16 brands from Dhaka, Bangladesh were tested for the numbers of total coliforms, fecal indicator bacteria (i.e., thermotolerant Escherichia coli and Enterococcus spp.) and potential bacterial pathogens (i.e., Aeromonas hydrophil, Pseudomonas aeruginos, Salmonella spp., and Shigella spp.). Among the 16 brands tested, 14 (86%), ten (63%) and seven (44%) were positive for total coliforms, E. coil and Enterococcus spp., respectively. Additionally, a further nine (56%), eight (50%), six (37%), and four (25%) brands were PCR positive for A. hydrophila lip, P. aeruginosa ETA, Salmonella spp. invA, and Shigella spp. ipaH genes, respectively. The numbers of bacterial pathogens in bottled water samples ranged from 28 ± 12 to 600 ± 45 (A. hydrophila lip gene), 180 ± 40 to 900 ± 200 (Salmonella spp. invA gene), 180 ± 40 to 1,300 ± 400 (P. aeruginosa ETA gene) genomic units per L of water. Shigella spp. ipaH gene was not quantifiable. Discrepancies were observed in terms of the occurrence of fecal indicators and bacterial pathogens. No correlations were observed between fecal indicators numbers and presence/absence of A. hydrophila lip (p = 0.245), Salmonella spp. invA (p = 0.433), Shigella spp. ipaH gene (p = 0.078), and P. aeruginosa ETA (p = 0.059) genes. Our results suggest that microbiological quality of bottled waters sold in Dhaka, Bangladesh is highly variable. To protect public health, stringent quality control is recommended for the bottled water industry in Bangladesh.
Full text:
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Index:
LILACS (Americas)
Main subject:
Water Pollution
/
Drinking Water
/
In Vitro Techniques
/
Polymerase Chain Reaction
/
Enterobacteriaceae
/
Enterobacteriaceae Infections
/
Coliforms
/
Anti-Bacterial Agents
Language:
English
Journal:
Braz. j. microbiol
Journal subject:
Microbiology
Year:
2013
Type:
Article
Affiliation country:
Australia
/
Bangladesh
Institution/Affiliation country:
CSIRO Land and Water/AU
/
Independent University Bangladesh/BD
/
Queensland University of Technology/AU
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