Isolation and Identification of Dominant Bacteria from Raw Donkey Milk Produced in a Region of Morocco by QIIME 2 and Evaluation of Their Antibacterial Activity

Table 3

Antibacterial activity of supernatant from lactic acid bacteria against pathogenic bacteria.

Strains		Culture condition
		MRS	MRS + E.Y.	MRS + glu	MRS + Mn	UV	MRS + SDS	MRS + Tw20	MRS + Listeria	MRS + EDTA
Aerococcus viridans	Escherichia coli	+	+	+	+++	+	+++	++++	+++	+
	Staphylococcus aureus	+	+	+	+	+	+	++	+	+
	Listeria monocytogenes	++	++	+++	+	++++	+++	++++	++++	+
Enterococcus faecalis	Escherichia coli	+	+	+	+	++	+	+++	++	+
	Staphylococcus aureus	++	+	+	++	++	++	++	+	++
	Listeria monocytogenes	++	+++	+++	+	+++	++	++++	++	+
Enterococcus devriesei	Escherichia coli	+	+	+	+	++	+	+	++++	+++
	Staphylococcus aureus	+	++	++	++	++	++	++	++	+
	Listeria monocytogenes	+	+	++	++	+++	++	++++	+++	+
Enterococcus viikkiensis	Escherichia coli	+	+	+	+	+	+	+	+	+
	Staphylococcus aureus	+	+	++	++	++	+	++	++++	+
	Listeria monocytogenes	++	+++	++++	+++	++++	+	++++	++++	+
Leuconostoc mesenteroides	Escherichia coli	++	++	+++	++++	++++	+	+	+	+
	Staphylococcus aureus	++	++	++	+	++	+	++	++	+
	Listeria monocytogenes	+	++++	++	++	++	+	++++	++++	+

E.Y., extract yeast; Glu, glucose; Mn, manganese; UV, ultraviolet; SDS, sodium dodecyl sulfate; Tw20, Tween 20. Antibacterial activity was expressed as growth inhibition, low (+), moderate (++), or strong (+++). (+) weak inhibition (4–9 mm), (++) intermediate inhibition (10–14 mm), (+++) strong inhibition (14–19 mm), and (++++) very strong inhibition (>19 mm).