10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 1 2012 (January - March) The hemolymph of lessThan i greaterThan Camponotus compressus lessThan /i greaterThan was screened for antibacterial activity against clinically important bacterial species ( lessThan i greaterThan Kleibsiella pneumonia lessThan /i greaterThan MTCC 109 lessThan i greaterThan , Vibrio cholera lessThan /i greaterThan ATCC 14035 lessThan i greaterThan , Micrococcus luteus lessThan /i greaterThan ATCC 4698 and lessThan i greaterThan Staphylococcus aureus lessThan /i greaterThan MTCC 96) using agar well diffusion method. The lessThan i greaterThan C. compressus lessThan /i greaterThan hemolymph showed strong activity against the susceptible strains lessThan i greaterThan S. aureus lessThan /i greaterThan MTCC 96 and lessThan i greaterThan K. pneumonia lessThan /i greaterThan MTCC 109. The hemolymph exhibited considerable inhibitory effects against all the pathogenic organisms under test while their major components demonstrated various degrees of growth inhibition. Literature survey of lessThan i greaterThan Camponotus compressus lessThan /i greaterThan revealed that no researcher has yet reported anti bacterial activities of lessThan i greaterThan C. compressus lessThan /i greaterThan . Therefore, it is worth conducting an investigation on the anti bacterial activity of an ant species, lessThan i greaterThan C lessThan /i greaterThan . lessThan i greaterThan compressus. lessThan /i greaterThan Pradeep Padmanabhan, Revathy Gopalakrishnan And Kasinathan Kalimuthu Antibacterial, black ant, hemolymph, Camponotus compressus 503-506