to essential oils than Gram-negative bacteria due to their
outer membrane barriers (Burt, 2004). Among Gram-positive
bacteria B. cereus was the most sensitive to the ethyl acetate
extract from kaffir lime peel (MIC 0.56 mg/ml) whereas L.
monocytogenes was the most resistant (MIC 1.13 mg/ml).
Similarly, the ethyl acetate extract from lime peel
(Citrus aurantifolia Swingle) showed broad spectrum
inhibitory against all Gram-positive bacteria, yeast and mold
tested. However, the ethyl acetate extract from kaffir lime
peel was more effective than the ethyl acetate extract from
lime peel against Sac. cerevisiae var. sake and A. fumigatus
TISTR3180. Both extracts exhibited MIC and MBC values
against B. cereus at 0.56 mg/ml and against S. aureus, and
L. monocytogenes at 1.13 mg/ml. The results were correlated