Ma. Kristine Joy S. Calvario, Doris P. Ogdoc (January 2003)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
The antibacterial potential of the tannin containing plant extracts of atis (Anona squamosa), babana (Anona muricata), ipil-ipil (Leucaena leucocephala), makahiya (Mimosa pudica), and talisay (Terminalia catappa) were tested against Staphylococcus aureus and Escherichia coli using disc diffusion method.
The diameter zone of inhibition after 24 hours of incubation was measured. One Way Analysis of Variance and Tukey Test (a0.05) was used to see if the antibacterial potential of the extracts vary significantly. The results showed tetracycline as having the largest diameter zone of inhibition against Staphylococcus aureus and Escherichia coli while distilled water as the lowest.
Diameter Zone of Inhibition against Staphylococcus aureus decreased in order: Tetracycline (positive control)=talisay>ipil-ipil=babana=atis=makahiya> distilled water. Diameter Zone of Inhibition against Escherichia coli decreased in order: Tetracycline>talisay = makahiya> ipil-ipil= babana= atis> distilled water (negative control).