• Sini Anoop
• Risvana Ummer
• Razia Beevi M

The present study was carried out to investigate the seasonal variation of coliform load and THB, and to examine the antibiotic resistance of selected strains of bacteria. Highest coliform load and THB in water (coliform load (95-1400+/100 ml), THB (0.2-2×106 cfu/ml)) and sediment (coliform load (20-1400+/100 g), THB (0.1-1.5×106 cfu/g)) was observed during the monsoon season. However there was no significant correlation between the microbial load and physicochemical parameters in the present study. From the total 224 isolates obtained from the water and sediment samples, maximum number of isolates were present in the monsoon season (97 isolates), followed by post-monsoon (84 isolates) and pre-monsoon (43 isolates). Enterobacteriacea were the dominant forms in the monsoon (48%) and post-monsoon (74%), and Bacillus sp. (56%) for pre-monsoon. In this study most of the isolated bacteria were resistant to commonly used antibiotics. Of the 10 antibiotics used, 5 of them were resistant to Enterobacteriacea. The MAR index for Enterobacteriacea was 0.5 and was 0.2, 0.7 and 0.8 for Staphylococcus sp., Bacillus sp., and Micrococcus sp. respectively.

Coliform load, THB, antibiotic-sensitivity, MAR index and Biyyam backwaters

"Seasonal variation of coliform and total heterotrophic bacteria and antibiotic resistance of selected isolated strains from Biyyam backwaters", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 2, page no.605-613, February-2019, Available :http://www.jetir.org/papers/JETIR1902479.pdf

"Seasonal variation of coliform and total heterotrophic bacteria and antibiotic resistance of selected isolated strains from Biyyam backwaters", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 2, page no. pp605-613, February-2019, Available at : http://www.jetir.org/papers/JETIR1902479.pdf