Table 4.

Percentage reduction of S. aureus biofilm biomass by EOCN, geraniol and chlorhexidine (mg/mL)

	4 mg/ml	2 mg/ml	1 mg/ml	0.5 mg/ml	0.25 mg/ml	0.125 mg/ml
EOCN	100.0 ± 0.0Aa*	98.9 ± 1.0Aa	98.3 ± 1.6Aa	95.0 ± 2.7Aa	72.7 ± 7.1Ab	61.0 ± 6.6Ab
GER	98.5 ± 0.6Aa	99.9 ± 0.0Aa	99.0 ± 0.3Aa	98.1 ± 0.6Aa	95.0 ± 2.5Ba	84.2 ± 3.5Ba
CLR	95.7 ± 1.4Aa	93.3 ± 2.2Aa	100.0 ± 0.0Aa*	99.7 ± 0.2Aa	97.6 ± 1.1Ba	99.8 ± 0.1Ba

EOCN Essential oil Cymbopogon nardus, GER Geraniol, CLR Chlorhexidine

*Averages ± standard error followed by the same letter do not differ statistically from one another, upper-case letters correspond to the columns, and lower-case letters correspond to the rows. One-way ANOVA test (p < 0.01) with the Bonferroni post-test