Table 2.

Taxonomical characterization of the six soil isolates.

Isolates	Hydrolysis of starch	Proteolytic activity	Melanoid formation	Nitrate reduction	Production of acid	Liquefaction of gelatin	Carbohydrate assimilation	Hydrogen sulfide production	Utilization of citrate	Methyl red	Indole
C-5	–	+	–	+	+	+	–	–	–	+	+
C-8	–	–	+	+	+	+	+	–	–	+	+
D-1	+	–	–	+	+	+	–	–	–	+	–
D-3	+	+	+	+	+	+	+	–	–	+	+
D-6	+	+	+	+	+	+	–	+	–	–	+
G-6	+	+	+	+	+	+	–	–	–	+	+

(+): Positive test, (-): Negative test.