Streptomyces albus
Younger colonies are grey and have a smooth surface. The larger, older colonies are white in colour and and have velvet-like surface (due to spore formation). The colonies adhere to the surface of the agar, and are extremely tough in consistency.		The same Blood Agar examined with transmitted light. A beta-haemolytic zone is seen around the colonies.
General characteristics: Gram-positive rods, which form branched filaments that produce coccoid spores terminally.
Microscopy: Colony viewed at 320x magnification Gram stain