Bacterial Load In Drinking Water Supplied At Different Private Hospitals In Dhaka, Bangladesh

Abstract

Water samples supplied in different private hospitals of Dhaka city, Bangladesh were collected for microbiological analysis. The hospitals were Ibrahim Memorial Hospital (B1RDEM), Lab Aid Hospital, Gonoshasthaya Nagor Hospital, Ibn Sina Hospital and Japan Bangladesh Friendship Hospital. Aerobic heterotrophic bacterial count ranged between 1.8 * 10⁴ and 4.6 * 10⁴cfu/100 ml. Enteric and related bacterial abundance in MacConkey, SS and Cetrimide agar media ranged from 0 to 7.6 * 10⁴, 0 to 3.4 * 10⁴ and 0 to 2.2 x 10⁴ cfu/100 ml, respectively. A total of 27 bacteria was isolated during the study period. Among them 19 were heterotrophic and 8 were enteric and related bacteria. Among the heterotrophic isolates 14 were gram-positive, of which 13 were rod shaped, spore former under the genus Bacillus viz. Bacillus circulans, B. fastidiosus, B. badius, B alcalophilus, B. brevis, B. lentus, B. firmus, B. subtilis and another one was coccus as Planococcus. Five heterotrophic gram-negative isolates were under the genus Pseudomonas and Aeromonas All enteric and related isolates were gram-negative, short rod and non-spore former and belong to genera Salmonella, Shigella, Klebsiella Pseudomonas and Escherichia.

Asiat. Soc. Bangladesh, Sci. 40(2): 165-171, December 2014