Để đánh giá mức độ ảnh hưởng của việc sử dụng kháng sinh trong nuôi trồng thủy sản ở vịnh Nha Trang, đề tài này được tiến hành với mục tiêu kiểm nghiệm khả năng kháng kháng sinh của các vi khuẩn gây bệnh cơ hội phân lập từ nước và trầm tích quanh khu vực lồng nuôi tôm/cá. | Vietnam Journal of Marine Science and Technology Vol. 20 No. 4A 2020 199 209 DOI https 1859-3097 15661 http jmst Antibiotics resistance in pathogenic bacteria isolated from water and sediment around the floating fish farms in the Nha Trang bay Nguyen Kim Hanh Nguyen Trinh Duc Hieu Nguyen Minh Hieu Vo Hai Thi Pham Thi Mien Hoang Trung Du Phan Minh Thu Nguyen Huu Huan Institute of Oceanography VAST Vietnam E-mail nguyenkimhanh84@ Received 28 August 2020 Accepted 26 October 2020 2020 Vietnam Academy of Science and Technology VAST Abstract To assess the impact of antibiotic use in aquaculture in Nha Trang bay we conducted this study with the aim of assessing antibiotic resistance of opportunistic pathogenic bacteria isolated from water and sediment around shrimp fish cages in the Nha Trang bay. 109 strains of Vibrio Salmonella-Shigella and Aeromonas groups were isolated in the surrounding environment of farming areas in Dam Bay and Hon Mieu. Antimicrobial resistance test of these 109 strains showed that in the water environment in Dam Bay TET and NIT were the two antibiotics with the highest rates of resistant bacteria while no bacteria were resistant to RIF. All 5 types of antibiotics had a statistically insignificant percentage of antibiotic-resistant bacteria in water samples at Hon Mieu ranging from to . Also in the water environment the rate of antibiotic-resistant bacteria in Dam Bay was not influenced by the distance to the cages . Meanwhile in Hon Mieu the highest rate of resistant bacteria was observed at the distance of 200 m 100 away from cages and the lowest rate at the distance of 100 m 20 . In the sediment environment around the cages both the Dam Bay and Hon Mieu farming areas showed the highest rates of antibiotic-resistant bacteria against TET NIF and RIF had the lowest rate of resistant bacteria. Among the total of 109 strains tested for antibiotic resistance 2 strains .
