International Journal of Current Microbiology and Applied Sciences

ISSN: 2319-7706 Volume 2 Number 10 (2013) pp. 230-237

Antimicrobial potential of marine bacterial isolates from different Coastal regions of Andhra Pradesh and Tamil Nadu, India

Challa Krishna Kumari1 , Ravuri Jaya Madhuri* and Chilakapati Damodar Reddy2

1Department of Applied Microbiology, Sri Padmavathi Mahila Visvavidyalayam, Tirupati-517 502, Andhra Pradesh, India. 2Sugen Life sciences Pvt. Ltd. 4/86 S.V. Nagar, Perumalla Palli, Tirupati-517 505, Andhra Pradesh, India

ABSTRACT

The current study characterizes marine bacteria isolated from the coastal regions (Chennai, Ongole & Nellore), and tests their antimicrobial activities. From these samples bacteria were isolated by spread plate technique using marine agar. About 24 bacterial strains were isolated and screened for antimicrobial activity through agar diffusion method, of which only two isolates exerted an inhibitory effect against target organisms (Enterococcus feacalis, Staphylococcus aureus and Klebsiella pneumoniae). These isolates were characterized phenotypically by means of morphological techniques and physiologically by conventional tests. One of the bacterial isolates was Gram positive rod, identified as Bacillus licheniformis, and other Gram negative rod conformed as Pseudomonas aereuginosa.

Keywords

Sea water; marine bacteria; antimicrobial activity; coastal regions; resistant pathogens.