Detachment, distinguishing proof of bacterial pathogens from infected Shing (Heteropneustes fossilis) cultured in freshwater ponds in Bangladesh

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Research Paper 01/06/2021
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Detachment, distinguishing proof of bacterial pathogens from infected Shing (Heteropneustes fossilis) cultured in freshwater ponds in Bangladesh

Mohammad Zakerin Abedin, Rubait Hasan, Md. Sadiqur Rahman, Laila Jarin, Rasheda Yasmin Shilpi, Rokibul Islam, Md. Ataur Rahman
Int. J. Biomol. & Biomed.12( 3), 10-16, June 2021.
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Among the local fishes, Shing (Heteropneustes fossilis) is one of the most demandable, popular and highly valuable fish in Bangladesh. A total of 84 clinically infected shing fishes were directly collected by a cultivator from their own ponds between April 2019 and December 2019. In total, eighty four fish-based ponds, 58(69.1%) were in Mymensingh region and the rest 26(30.9%) were in Netrakona districts in Bangladesh. Out of 84 infected fish samples, 74(88.1%) were infected with pathogenic bacteria and 10(11.9%) were with normal flora. A total of 74 pathogenic bacterial strains were isolated and among the isolates Aeromonas spp, Pseudomonas spp, Staphylococcus spp, Citobacter spp, and Vibrio spp, appeared to be the main pathogen in the diseased fishes. Among the isolated species of bacteria distribution of the largest pathogens Aeromonas species was 38 (51.4%), and second the largest Pseudomonas spp was 15(20.3%). The rest of isolates were distributed as Staphylococcus spp 7(9.4%), Citobacter spp 4(5.4%), Vibrio spp 3(4.1%) and only 7(9.4%) others namely Bacillus spp, Edwardsiella spp, Enterococcus spp, Flavobacterium spp, Klebsiella spp in infected H. fossilis. The cultivation of shing (H. fossilis) fishes is dramatically increased all over the country. However, bacterial diseases may influence to decrease the production in ponds water. In this work, bacterial pathogens were sensitive against Ciprofloxacin (77%), Cotrimoxazole (97.3%), and Enorfloxacin (97.8%). All the strains showed resistant to 74/74(100%) Amoxicillin, and 63/74(85.1) erythromycin. The intermediate sensitive against Colistin was 35.1% and Doxycycline was 22.9% respectively.


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