Infectious characteristics of some Vibrio spp. phages isolated in shrimp farming of the Mekong delta

Le Hoang Bao Ngoc Nguyen Thi Loan Anh Vo Ngoc Tram Anh Nguyen Thi Phuong Uyen Le Viet Dung Truong Thi Bich Van   

Open Access   

Published:  May 03, 2024

DOI: 10.7324/JABB.2024.154284

Vibrio spp. Were a cause of serious disease in aquaculture. This study aimed to develop a Vibrio spp. inhibition method that is safe and friendly for the environment, namely bacteriophage (phage). Vibrio spp. and their phages were isolated from shrimp, water, and mud from farms in Mekong Delta provinces (Kien Giang, Soc Trang, and Bac Lieu provinces). Then, the phage influence on the bacterial concentration and the toxR gene was investigated by comparing the gene sequences pre- and post-infection. The polymerase chain reaction identified 31 strains of Vibrio spp., including 9 of Vibrio parahaemolyticus. Then, using several isolated Vibrio spp. as hosts, 32 phage strains were isolated. Results found that each bacteriophage affected the Vibrio toxR gene in specific ways. Phage ST9 and phage ST10 did not change bacterial concentration, but they could change nucleotides at 4 positions compared to the V. parahaemolyticus sequence. Nevertheless, phage KG6 could reduce bacterial concentration but did not affect gene sequences. The bacteriophages can affect bacteria through several mechanisms, including reducing the bacterial concentration via the lytic process or affecting genes encoding bacterial virulence. These findings open a new direction in phage therapy research if such an effect can reduce or neutralize bacterial virulence.

Keyword:     Bacteriophage Vibrio parahaemolyticus toxR gene Isolation Mekong delta


Ngoc LHB, Anh NTL, Anh VNT, Uyen NTP, Dung LV, and Van TTB. Infectious characteristics of some Vibrio spp. phages isolated in shrimp farming in the Mekong delta. J App Biol Biotech. 2024. Online First.

Copyright: Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.

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