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

Table 6

The antagonistic effects of temperature, pH, organic solvents, and additives on the CFS.

Concentrations used for treatment	RS18	RS25	RS37	RS48	RS72	RS89	RS97	RS115
Temperature/time
45°C/30 min	++	++	++	++	++	++	++	++
65°C/30 min	++	++	++	++	++	++	++	++
85°C/30 min	+	+	+	++	+	++	+	++
100°C/30 min	̶	̶	—	++	—	++	̶	++
121°C/30 min	̶	̶	—	̶	̶	—	̶	̶
pH/time
2/30 min	+	+	+	++	+	++	++	++
4/30 min	++	++	++	++	++	++	++	++
6/30 min	++	++	++	++	++	++	++	++
8/30 min	+	+	+	++	+	++	+	++
10/30 min	̶	̶	̶	̶	̶	̶	̶	̶
12/30 min	̶	̶	—	̶	̶	—	̶	̶
Organic solvent/time
Methanol 10% (vol/vol)/30 min	+	+	+	++	+	++	+	++
Ethanol 10% (vol/vol)/30 min	++	++	++	++	++	++	++	++
Additive/time
Potassium chloride 1% (wt/vol)/30 min	+	+	+	++	+	++	+	++
Sodium citrate 1%(wt/vol)/30 min	++	++	++	++	++	++	+	++

̶ ̶: no inhibition zone; + Inhibition ; ++ have inhibition  mm.