Evaluation of Soil Streptomyces Isolates from North-Western Ethiopia as Potential Inhibitors against Spoilage and Foodborne Bacterial Pathogens

Table 1

Primary screening of actinomycete isolates for antimicrobial compound production against spoilage and foodborne bacterial pathogens.

	Gram-positive test bacterial strains			Gram-negative test bacterial strains
Isolates	S. aureus	B. cereus	L. Monocytogenes	E. coli	S. Enterica	P. aeruginosa
RS1	—	+	+	—	—	+
RS3	+	—	—	—	+	—
RS7	+	—	—	—	+	—
RS9	—	++	+	—	—	+
RS12	+	—	+	—	—	—
RS14	+	+	—	+	+	—
RS18	++	++	++	++	++	++
RS19	+	+	+	—	—	—
RS21	—	++	+	—	—	—
RS23	—	—	+	—	+	—
RS25	++	++	++	++	++	++
RS26	+	—	—	+	—	—
RS28	—	+	+	—	—	+
RS29	—	++	—	—	—	—
RS30	—	+	+	—	—	—
RS31	+	—	—	+	—	—
RS33	++	+	+	—	—	—
RS35	+	++	—	—	+	—
RS37	++	++	++	++	++	++
RS40	—	+	+	—	—	—
RS42	+	—	—	+	+	—
RS45	+	—	—	—	+	—
RS46	—	+	—	—	+	—
RS48	++	++	++	++	++	++
RS49	+	—	—	—	+	—
RS72	++	++	++	++	++	++
AS78	+	—	—	—	—	+
AS84	+	—	—	—	+	—
AS89	++	++	++	++	++	++
AS93	+	—	—	+	+	—
AS97	++	++	++	++	++	++
AS100	+	—	—	+	—	—
AS104	+	+	—	—	—	—
AS107	—	++	—	+	—	—
AS111	—	+	+	+	—	—
AS115	++	++	++	++	++	++

Keys: RS = rhizosphere soil; AS = agricultural soil. ̶ denotes no clear zone + inhibition ; ++ have inhibition .