الفهرس 
Title : Screening of antibiotic resistant bacteria in aquatic ecosystems
AbstractOnly 14 pages are availabe for public view
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Abstract
The overuse of antibiotics has contributed to the rapid spread of antibiotic resistant bacteria which led to increasing interest about the potential environmental and public health risks. This study is concerned with evaluating the prevalence of antibiotic resistant bacteria in different water types in Egypt. Also, the impact of biological treatment of industrial wastewater on the occurrence of antibiotic resistant bacteria was assessed. The drinking water treatment in all drinking water treatment plants (DWTPs) was microbiologically effective as the total bacterial count and antibiotics resistant bacteria were completely removed from treated Nile water and tap water samples. Only, in El-Giza DWTP the bacterial populations reappeared in tap water with decreased values comparing with raw Nile water. The counts of bacterial population, gentamycin, ciprofloxacin, doxycycline and amoxicillin resistant bacteria in tap water represented 0.0008, 0.73, 1.02, 90.9 and 0.6% of the counts in raw Nile water. Also, only in the first treated sewage sample, it was observed that the counts of total bacteria, gentamycin, ciprofloxacin, doxycycline and amoxicillin resistant bacteria decreased at a reduction percentage of 54.5, 76.9, 73.3, 84.0 and 77.3%, respectively. Entire disappearance of all tested bacterial groups and their correspondent antibiotic resistant populations was evident as a consequence of sewage treatment in the other tested samples. All isolates from raw Nile water, raw and treated sewage were considered as MDR. In the industrial wastewater and marine water, the MDR microorganisms were predominant in a percentage of 95.8 and 85.7%, respectively