Microorganism Basil type Eryb
Ra Sa La Lea Fa Ca
Gram negative              
S. arizonae 13314 13.7 (0.6) 11.7 (0.6) 12.7 (0.6) 11.7 (0.6) 12.3 (0.6) 9 (1) 8.3 (0.6)
S. typhimurium 14028 12 (0) 10.7 (0.6) 10.3 (0.6) 12 (0) 11 (0) 7.3 (0.6) Res
S.schottmuelleri 8759 11.3 (0.6) 10 (0) 10.3 (0.6) 10.7 (0.6) 10.3 (0.6) 6 (0) 7 (0)
S. tallahassee 12002 11 (1) 10 (0) 10.3 (0.6) 11.3 (0.6) 6 (0) 5.3 (0.6) 24.7 (0.6)
S. enteritidis 13076 15 (0) 13.7 (0.6) 14 (0) 15.3 (0.6) 11.3 (0.6) 7.7 (0.6) Res
S. typhimurium 13311 11.3 (0.6) 10 (1) 10 (0) 9.7 (0.6) 8 (0) 6.3 (0.6) 25 (1)
S. pullorum 19945 17 (1) 16 (0) 15.3 (0.6) 17 (1) 10.7 (0.6) 8.7 (0.6) Res
K. pneumoniae 13883 8.7 (0.6) 12.3 (0.6) 8.7 (0.6) 8 (0) 8 (0) 7 (0) 21.7 (0.6)
K. pneumoniae 10031 12.3 (0.6) 12 (0) 10.7 (0.6) 7.7 (0.6) 7.7 (0.6) 7 (0) 19.7 (0.6)
E. coli 11303 16 (0) 15 (0) 15.3 (0.6) 15.3 (0.6) 11.3 (0.6) 9.3 (0.6) Res
E. aerogenes 35028 12.3 (0.6) 12.7 (0.6) 10.7 (0.6) 11.3 (0.6) 9 (0) 7.7 (0.6) Res
Proteus vulgaris 5380 12.3 (1.1) 11.3 (0.6) 12.3 (0.6) 9.3 (0.6) 8.7 (0.6) 6 (0) 34.3 (0.6)
P. vulgaris 49132 9.7 (0.6) 11.7 (0.6) 10.3 (0.6) 9.3 (0.6) 8.3 (0.6) 7 (0) 19 (0)
Shigellaboydii 9207 12.7 (0.6) 12 (0) 11.7 (0.6) 13.3 (0.6) 10.3 (0.6) 9.3 (0.6) Res
S. sonnei 9290 15.3 (0.6) 14.7 (0.6) 11.7 (0.6) 14.7 (0.6) 10.6 (0.6) 9.3 (0.6) 7 (0)
S. flexneri 18022 16.3 (0.6) 15.3 (0.6) 13.7 (0.6) 16.3 (0.6) 12 (1) 10.3 (0.6) 9 (0)
Y. enterocolitica23715 11.7 (0.6) 11 (1) 10 (1) 11.7 (0.6) 9 (1) 9 (0) 21.3 (0.6)
Gram positive              
S. aureus 12598 14 (0) 13.3 (0.6) 11.7 (0.6) 12.7 (0.6) 9.3 (0.6) 9.7 (0.6) 23.3 (0.6)
S. aureus 25923 15.3 (0.6) 13.7 (0.6) 13.3 (0.6) 15 (0) 9 (0) 8.7 (0.6) 24.3 (0.6)
S. aureus 12600 14 (0) 12.7 (0.6) 12.7 (0.6) 15.3 (0.6) 8.7 (0.6) 9 (0) 23 (1)
S. epidermidis 12228 13 (1) 12.7 (0.6) 12.7 (0.6) 8.7 (0.6) 7.3 (0.6) 6 (0) 22 (0)
S. epidermidis 14990 12.7 (0.6) 12.7 (0.6) 11.7 (0.6) 8.7 (0.6) 7 (0) 7.7 (0.6) Res
S. lentus 700403 15.7 (0.6) 14.7 (0.6) 15.3 (0.6) 11.3 (0.6) 9.7 (0.6) 6.7 (0.6) 19.3 (0.6)
S. hominis 27844 17 (0) 15.7 (0.6) 14.7 (0.6) 10.7 (0.6) 10 (0) 7 (0) 23.7 (0.6)
S. saprophyticus 3552 13.7 (0.6) 13.3 (0.6) 12.3 (0.6) 10.3 (0.6) 8.7 (0.6) 6 (0) 20.3 (0.6)
M. luteus 533 20.7 (1.1) 20.7 (0.6) 15.7 (0.6) 14.7 (0.6) 13.7 (0.6) 12.3 (0.6) 34.3 (0.6)
M. luteus 49732 21.7 (0.6) 21.3 (1.1) 19.7 (0.6) 19.7 (0.6) 17.3 (0.6) 12.3 (0.6) 26.7 (0.6)
M. luteus 4698 16.3 (0.6) 15.7 (0.6) 15.3 (0.6) 12.7 (0.6) 12 (0) 10.3 (0.6) 19.7 (0.6)
L. monocytogenes15313 15 (1) 13.7 (0.6) 14.7 (0.6) 13.7 (0.6) 12 (0) 9 (0) 9 (0)
L. monocytogenes 7644 13.3 (0.6) 11.7 (0.6) 11.7 (0.6) 11.7 (0.6) 9 (0) 9 (0) 25.7
L. monocytogenes19111 19.3 (0.6) 18.7 (0.6) 14.7 (0.6) 18.3 (0.6) 10.3 (0.6) 9 (0) 29 (0)
Bacillus cereus 14579 22.3 (0.6) 20.7 (0.6) 18.3 (1.1) 11.7 (0.6) 10.3 (0.6) 8 (0) 16.7 (0.6)
B. cereus 10876 24.7 (0.6) 23.3 (0.6) 21.3 (0.6) 12.6 (0.6) 11.3 (0.6) 10.3 (0.6) 15 (0)
Mean values of three experimental trials are reported with standard deviation given in parenthesis. All cases of EOs showing increased antimicrobial activity relative to erythromycin are shown in bold;
aBasil type: R: Red; S: Small-leaved; L: Large-leaved; Le: Lettuce-leaved; F: Lettuce-leaved Flower; C: Cinnamon
bEry: erythromycin; Res: resistant to erythromycin.
Table 1: Disc diffusion assay (DA) results (diameter of zone of inhibition in mm).