Antibacterial Activity of Plant Extracts

[PDOGJPS at aol.com]

My name is Jeffrey Siegal and I am doing a science fair project on the 
effectiveness of plant extracts (eucalyptus, garlic, and grapefruit seed 
extract) in inhibiting the growth of e coli and s aureus. I want to compare 
their effectiveness to Penicillin, Streptomycin and Erythromycin.
Is there a test to compare antibacterial effectiveness of these herbal 
extracts to the drug. I was planning to use the Kirby-Bauer method but there 
is not, to my knowledge, a chart or table to identify the effectiveness.
Can someone help?
Thank you, jeffrey
PDOGJPS at aol.com


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