Antibacterial Activity of Lactic Acid Bacteria Isolated from Fermented Ethiopian Traditional Dairy Products against Food Spoilage and Pathogenic Bacterial Strains

Table 6

The antibacterial activity of the seven CFS LAB strains against food spoilage and pathogenic bacterial strains using the disc diffusion assay.

LAB strains	S. aureus (ATCC^® 29213)	B. cereus (ATCC^® 11778)	S. enteritidis (ATCC^® 13076)	L. monocytogenes (ATCC^® 7644)	P. aeruginosa (ATCC^® 27853)	E. coli (ATCC^® 8739)
Z1± SE	8.40 ± 0.5^a	9.60 ± 0.7^b	ND	8.80 ± 0.7^b	ND	9.70 ± 1.4^c
Z2± SE	16.0 ± 0.3^a	14.0 ± 0.4^a	12.0 ± 0.8^a	13.0 ± 1.4^c	12.5 ± 1.5^c	13.0 ± 0.7^a
Z3± SE	10.0 ± 0.7^a	11.0 ± 0.3^b	10.3 ± 1.0^b	ND	ND	ND
Z4± SE	15.5 ± 1.2^a	16.0 ± 0.6^a	15.0 ± 1.3^c	14.0 ± 1.2^c	16.4 ± 1.0^b	15.3 ± 1.5^c
M1± SE	12.0 ± 0.7^b	11.5 ± 1.4^b	12.6 ± 0.7^b	12.0 ± 0.5^a	11.7 ± 1.4^b	12.5 ± 0.7^b
F2± SE	8.30 ± 1.5^a	9.80 ± 1.0^a	5.80 ± 0.9^b	5.50 ± 0.9^b	9.50 ± 0.5^a	8.50 ± 1.0^b
N2± SE	15.5 ± 0.4^a	16.0 ± 0.5^b	14.0 ± 0.9^b	14.4 ± 0.6^a	16.0 ± 0.2^a	13.6 ± 0.7^a
CN ± SE	24.3 ± 1.0^b	26.0 ± 0.4^b	20.8 ± 1.2^c	19.0 ± 1.5^c	18.6 ± 1.0^c	22.0 ± 0.5^a
DW± SE	ND	ND	ND	ND	ND	ND

CN = Gentamicin (10 µg/disc) (positive control); DW = distilled water (negative control); ND = not detected. Data are average of triplicates; numbers followed by the same letter superscripts in the same row do not vary significantly by Duncan’s multiple range test at ; SE: standard error.