Antibiotic and heavy metal resistance properties of bacteria isolated from the aeration lagoons of common effluent treatment plant (CETP) of tannery industries (Unnao, India)
514-519In the present
study, 12 aerobic bacterial strains were isolated from the common effluent
treatment plant (CETP) of tannery industries and identified as Alcaligenes sp. (FJ55942), Pantoea sp. (FJ55943), Bacillus
megaterium (FJ55944),
B. marisflavi (FJ55945), B. subtilis (FJ55946), B. megaterium (FJ55947),
B. cereus (FJ55948), B. pumilus (FJ55949), Pseudomonas sp. (FJ55950), Bacillus sp. (FJ55951), B. subtilis
(GU193980) and Klebsiella pneumoniae (GU193981) <span style="mso-bidi-font-style:
italic">having closest relationship with <i style="mso-bidi-font-style:
normal">Agrobacterium larrymoorie bacterium.<i style="mso-bidi-font-style:
normal"> Further, the results of antibiotic and heavy metal resistant
studies have shown that all the bacterial isolates of initial and final
aeration lagoons were intermediate for ciprofloxacin and tetracycline, except Alcaligenes sp. and Pantoea sp. In addition, the bacterial isolates
of initial aeration lagoon have shown a wide range of MIC values ranging from
90-650, 60-250, 150-800, 600-700, 400-650, 90-600, 400-600 and 60-500 µg mL-1
for Cr, Cu, Zn, Fe, Ni, Pb, Mo and As; while that of final aeration lagoon, it
was 140-600, 60-250,
600-700, 550-700, 400-650, 100-300, 400-650 and 200-400 µg mL-1 for
Cr, Cu, Zn, Fe, Ni, Pb, Mo and As, respectively. All these bacterial isolates
were found to have a wide range of multi-drug and multi-metal resistant
property, indicating that industrial effluents are organically enriched medium
supporting the fast growth and spreading of antibiotics and heavy metals
resistant microbes in the environment.
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