ABSTRACT
Objective To isolate marine microorganisms against murine melanoma cells B16.Methods Using Gause,M1,and Martin media for isolation.Isolates were fermented in the soy flour medium,the fermentation supernatant were tested against murine melanoma cells B16 by observing the growth inhibition or killing of the tumour cells under microscope.The results were statistically analyzed by SAS.Results Six hundred and thirty four strains of marine microorganisms were isolated from 101 marine animal samples,of which 56 active strains against murine melanoma cells B16 were screened out,the percentage of cytotoxic active strains was 8.83%.Conclusion The number of cytotoxic active strains was higher from Actina,Mytilus edulis,Meretrix meretrix,Atrina,Ascidiacea,Tube Worm,and crabs.There was significant relation between different microorganism types isolated to the sampling locations.Hainan Lingshui New Village fishing row had the highest percentage of the actinomycetes,GuangXi Beihai Guchengling mangrove had the highest percentage of bacteria,and GuangXi Beihai Nanwan habor had the highest percentage of fungi.There was significant relation between cytotoxic activity of the isolated strains to different microorganism types of bacteria,actinomycetes and fungi,among which thebacteria showed highest percentage of cytotoxic activity.