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Advances in Animal and Veterinary Sciences

Research Article
Adv. Anim. Vet. Sci. 2 (1): 20 - 25
http://dx.doi.org/10.14737/journal.aavs/2014.2.1.20.25
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Pandian Krishnan, Malathi Balasubramaniam, S. Dam Roy, Kamal Sarma, Rizwana Hairun, Jai Sunder*
Central Agricultural Research Institute, Port Blair, A and N Islands, India 744 1010
*Corresponding author: jaisunder@rediffmail.com

ABSTRACT
Among marine invertebrates, sponges are the most prolific phylum, with regard to presence of novel pharmacologically active compounds. Bacteria, living on the surface of marine invertebrates, have been found to produce chemicals that have potential antimicrobial activities. To test this hypothesis, a total of about 30 bacterial isolates associated with the marine sponge, Stylissa sp collected from North Bay, Andaman were successfully screened for antimicrobial activity against selected human, animal and plant pathogens including Aeromonas hydrophila, Bacillus subtilis, Enterococcus durans, Streptococcus lentus, Klebsiella pneumoniae and Rolstonia solanacearum using disc diffusion assay. The bacterial isolates were identified as belonging to the genera Marinomonas, Alteromonas, Marinobacter, Chromohalobacter, Halomonas, Cytophagas and Amylocolate based on their biochemical properties. Of the total bacterial isolates tested, 66.67% were found to have antimicrobial properties ranging from broad spectrum to species specific. One of the isolates, S8 inhibited K. pneumoniae with about 95% and 30% of the efficiency of Erythromycin and Ciprofloxacin, respectively. The findings of the study highlight the importance of sponge surface–associated bacteria in producing new natural compounds with antimicrobial activities.

Key Words: Antibacterial activity, Characterization, Marine sponge, Stylissa spp., Surface associated bacteria