Studies on the Influence of Physico-chemical Properties on Water Quality and Antibiotic Resistant Pattern of Enteric Bacteria Isolated from Different Water Sources in Bangladesh
M. S. Islam,
M. A. Rahman
A total of 90 water samples obtained from various sources (tubewell, reservoir tank, tap supply, pond, river and aqua mineral) collected in three seasons were examined for their water quality based on total bacterial count and physico-chemical properties. The combined effect of physico-chemical properties of water on the growth and propagation of bacteria was highly significant (P<0.01) in pond and river water and very poor and insignificant (P<0.05) in tubewell, reservoir tank, tap and aqua mineral water. One hundred sixty four isolates of enteric bacteria including Escheria coIi, fecal Streptococci, Salmonella and Shigella were examined for their sensitivity to antibiotics. The study revealed that 7.0 to 32% of isolates were resistant to tetracycline followed by ampicillin and streptomycin. Resistance to Chloramphenicol was of moderate degree (3 to 14%) and that to Ampicillin, Kenamycin and Gentamycin was relatively low (0.82 to 7.02%). E. coli possessed the highest antibiotic resistance and was most widespread among the bacterial isolates obtained from pond water.