2007, 20(6): 872-875.
The n-butanol extract from Pa rthenocissus tricuspidata leaves were examined for antimicrobial activity against five microbes by using filter papermethod. The results showed that the extract restrained the growth of Escherichia coli, Agrobacterium tum efaciens, B acillus subitilis and B acillus pum ilus,while inhibited the growth of yeast at acertain extent. And the minimum inhibitory concentrations (M IC) were 0. 25, 0. 3, 0. 25, 0. 3, 1. 0 g?mL - 1 respectively. Moreover the n-butanol extract also could restrained some bacterium strains, which had antibiotic resistances. After heated at 95 ℃ for 2~3 h, the n-butanol extract from P. tricuspidata leaves still p resented strong bacteriostasis to germs. This result indicated that the substance had heat-stability.