International Journal of Fisheries and Aquatic Studies

Volume 1, Issue 6, 2014


Probiotic activity of Pseudomonas aeruginosa (PIC-4) isolated from Visakhapatnam coast, Bay of Bengal, India, against Vibrio harveyi in Penaeus monodon


Author(s): Janakiram P., Veerendra kumar M., Jayasree L., Sivaprasad B.

Abstract: Pseudomonas aeruginosa (PIC 4), isolated from coastal waters of Visakhapatnam (Gen Bank Accession no: KF803248) was tested for its antagonistic activity against Vibrio harveyi as probiotic in cultured Penaeus monodon. Pseudomonas aeruginosa PIC 4 has proved to be non-pathogenic to the shrimp by pathogenicity tests. Vibrio counts in probiotic fed shrimp and the surrounding water medium were significantly lower when compared to the control group of shrimp and water during 50 days of culture. Mean weight of probiont fed shrimps after 50 days of culture was (2.21 + 0.15 g) , significantly higher than that of normal diet fed ones (1.33+0.18 g). Survival percent was also significantly higher in probiont fed shrimp (47.33% + 5.55%) than that of the control diet fed shrimp (26.33% + 7%). Percent survival in probiotic fed and normal diet fed shrimp after the challenge with V. harveyi was 93.04 and 38.87 respectively.

Fig 1:
Petri dish showing cross streak between Pseudomonas aeruginosa (PIC 4) and Vibrio harveyi.

Fig 2: Petri dish showing Agar well diffusion of Pseudomonas aeruginosa (PIC 4) on Vibrio harveyi.

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