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KMID : 0545120010110010050
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Journal of Microbiology and Biotechnology
2001 Volume.11 No. 1 p.50 ~ p.55
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Isolation and Characterization of Antibiotic and Heavy Metal-Resistant Pseudomonas aeruginosa from Different Polluted Waters in Sohag District, Egypt
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SOLTAN, EL-SAYED. M.
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Abstract
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Different polluted water samples were collected from a wastewater treatment plant, agricultural drainage canals, the River Nile, and irrigation canals. The samples were examined for the enumeration of Pseudomonas aeruginosa in the Sohag area, Egypt over a period of one year. A total of 240isolates were collected and tested for their resistance to 12common antibiotics and 6heavy metals. The isolates were found to be less resistant to norfloxacin (1.7%), ofloxacin (4.6%), amikacin (9.6%), tobramycin (10.4), carbenicillin (15.4), and gentamycin (41.3%), yet more sensitive to rifampicin (75%), kanamycin (89.6%), ampicillin (90.8%), chloramphenicol (91.7%), streptomycin (92.9%), and tetracyclin (96.3%). In contrast, 7.1%, 12.9%, 25.4%, and 53.7% of the isolates were resistant to lead, cadmium, mercury, and zinc, respectively. None of the isolates had developed a resistance to silver or molybdenum. The high frequency of metal-antibiotic double resistance existed between lead and amikacin (56.5%), cadmium and ofloxacin (72.7%), zinc and norfloxacin (100%), and mercury and carbenicillin (94.6%). The high occurrence of antibiotic-resistant bacteria in natural water could be related to the widespread use of antibiotics, with possible public health hazard.
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