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Abstract
The research about the inhibition test of bark extract of Moringa oleifera Lamk. to the growth of bactery Vibrio cholerae. It has been conducted on July until December. The aim of this esearch was to determine the effectiveness of bark extract of M. oleifera Lamk. to the growth of V. cholera bacteria and the content of bark extract M. oleifera Lamk. The extraction method used in this research was maceration testing method toward V. cholerae bacteria by using disc diffusion method. This research designed in a completely randomized design (CRD) with 6 treatments and 3 repetitions. At this research using stem bark extract concentration of 20%, 40%, 60% and 80%, the positive control using tetracycline hydrochloride 3% and a negative control using distilled water. The results showed that the concentration of bark extract 80% produced the greatest inhibition zone is 23.8 mm. This shows that the extract of the bark of Moringa oleifera Lamk. can inhibit Vibrio cholerae bactery.