In this present study, various leaf extract like petroleum ether, chloroform, ethyl acetate and methanol extract of Croton sparsiflorious Morong. and Jatropha gossipifolia L. were evaluated for their antibacterial activities against five different pathogens like Escherichia coli, Salmonella typhi, Staphylococcus aureus, Klebsiella pneumonia and Enterococcus faecalis were used. Petroleum ether and chloroform extracts of both plants are exist less amount of antibacterial activity. No other extracts used in this study is so good as Methanol. Ethyl acetate is also existing better activity however, the activity is not so good as methanol.

Keywords : Antibacterial, Croton sparsiflorious and Jatropha gossypifolia.