Halotolerant bacteria are microorganisms that can grow over a large variety of salt concentrations but thrive better in low salinities. This group of bacteria is known to be diverse in nature and can be isolated from the soil, water, and even some rocks. Their compatible solutes serve as survival mechanism when the organisms are exposed to high salinities. Halotolerant bacteria have been applied in the production of antimicrobial substances, in food biotechnology, in biological waste treatment, and in the use of Biosurfactants for bioremediation purposes. Halotolerant bacteria are made up of both Gram-positive bacteria and Gram-negative bacteria in different genera like Staphylococcus, Micrococcus, Bacillus, and Pseudomonas. This research emphasized on the isolation of halotolerant bacteria from Ezzu River, Amansea, Awka, Anambra state using nutrient medium supplemented with different salt (sodium chloride) concentrations and Marine Agar. Pour plate method was used for the isolation of the bacterial strains. The isolates which were yellow and creamy white in color were labeled A, B, and C and their morphological characteristics, noted. They were further Gram stained. The three isolates were Gram-positive cocci and appeared in clusters. They were non-motile. Further characterization was done using biochemical test: catalase test, coagulase test, citrate, and urease and carbohydrate fermentation of different sugars. After the analyses carried out on the three isolates, the halotolerant bacteria suspected to be present in Ezzu River, Anambra state were Staphylococcus aureus, Staphylococcus lentus, and Micrococcus luteus.
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