Paccial, Rodelen, Sevilla, Ceazar, Lopez, Marc Antaeus ( April 2004 )
ABSTRACT
The study tested the effectiveness of the antibacterial effects of malunggay, guava, gumamela, mayana, katakataka, rose, and alibhon on Staphylococcus aureus and Escherichia coli.
The study was aimed at finding out which of these plants, malunggay, guava, gumamela, mayana, kataktaka, rose, and alibhon, has the most effective antibacterial effect against Staphylococcus aureus and Escherichia coli.
The results were measured by counting the diameter of the zones of inhibition after 24 hours incubation period.
The results showed that malungay is the most effective antibacterial agent against Staphylococcus aureus with a mean zone of inhibition of 19.33 mm. On Escherichia coli, rose is the most effective antibacterial agent with a mean zone og inhibition of 21.33 mm. Katakataka is the least effective with mean zones of inhibition of 8.33 mm. and 9.33mm., respectively.
Using One way Analysis o Variance, the researchers found out that there is a significant difference among the effectiveness of the antibacterial agents of the local plants against Staphylococcus aureus and Escherichia coli.
On Staphylococcus aureas, the antibacterial effects of the plant extracts decreased in the order. Tetracycline ( Positive control )> Malunggay, Rose> Gumamela> Guava, Alibhon, Mayana> Katakataka> Distilled Water ( Negative control ).
On Escherichia colo, the antibacterial effects og the plant extracts decreased in the order: Tetracycline ( Positive contral )> Rose> Malunggay> Mayana> Gumamela> Guava> Katakataka> Distilled Water ( Negative control).