Table 2.

Screening for biosurfactant producing isolates by preliminary and complementary screening methods.

Isolate No.	Hemolytic activity	Oil displacement area (cm2)	Emulsification index (%)
1	−	2.2	0
2	−	1.8	0
3	+	4.4	0
4	−	1.4	6.4
5	+	4.6	0
6	+	4.2	0
7	+++++	28.2	46.6
8	+	3.6	0
9	++	2.8	24.2
10	+	2.6	20.2
11	+++	12.2	26.4
12	++	2.2	22.6
13	+	3.1	18.8
14	+++	16.8	24.4
15	++	3.6	22.6
16	++	2.8	23.6
17	++	2.9	24.3
18	+	1.4	16.6
19	++	2.8	22.4
20	++	2.4	22.6