Relative Prevalence of Antibiotic Resistance among Heterotrophic Bacteria from Natural and Culture Environments of Freshwater Prawn,Macrobrachium Rosenbergii |
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| Authors: | Abdulla A Mohamed Hatha A Deborah Gnana Selvam Ambatt P Thomas |
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| Institution: | 1. Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Cochin, Kerala, India;2. School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala, India |
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| Abstract: | As antibiotic residues and multidrug‐resistant (MDR) bacteria are of increasing concern to those involved in the seafood industry, there is an intense international focus to monitor MDR bacteria in seafood. There is also a trend to source seafood from organically raised farms in order to reduce antibiotic usage in culture operations. Hence this study was conducted to compare the antibiotic resistance among bacteria associated with various samples from the natural and culture environment of Macrobrachium rosenbergii. Samples from the natural environment included water, sediment, eggs, larvae, postlarvae (PL), feed items, and gut samples of M. rosenbergii and those from the culture environment were water, sediment, eggs, feed pellets, and gut samples of M. rosenbergii. Bacteria from water samples of natural and culture environments were frequently resistant to ampicillin, erythromycin, and penicillin, while more than 50% of the strains from sediment were resistant to erythromycin, nalidixic acid, and penicillin. Bacterial isolates from commercial feed had a relatively high degree of antibiotic resistance. Interestingly, occurrence of multiple drug resistance was higher among the bacteria associated with the samples from the natural environment of M. rosenbergii, pointing to more favorable selection pressure for drug resistant mutants in the natural environment. |
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