Identification and statistical optimization of fermentation conditions for a newly isolated extracellular cholesterol oxidase-producing Streptomyces cavourensis strain NEAE-42

Table 2 Culture characteristics of the Streptomyces sp. strain NEAE-42

Medium	Color of			Growth
Medium	Aerial mycelium	Substrate mycelium	Diffusible pigment	Growth
ISP medium 2 (Yeast extract -malt extract agar)	White to olive beige	Brown	Faint brown	Excellent
ISP medium 3 (Oatmeal agar)	Olive green	Olive brown	Faint brown	Excellent
ISP medium 4 (Inorganic salt-starch agar)	Olive green	Olive brown	Faint brown	Excellent
ISP medium 5 (Glycerol asparagines agar)	Olive beige	Brown	Faint brown	Excellent
ISP medium 6 (Peptone-yeast extract iron agar)	Faint beige	Faint yellowish brown	Non-pigmented	Excellent
ISP medium 7 (Tyrosine agar)	Faint beige	Faint brown	Non-pigmented	Excellent

The substrate mycelium pigment was not pH sensitive when tested with 0.05 N NaOH or 0.05 N HCl
The diffusible pigment was pH sensitive when tested with 0.05 N NaOH or 0.05 N HCl, yellow in acidic, brown in alkaline

ISSN: 1471-2180