Slowly growing Mycobacteria


Mycobacteria that form colonies clearly visible to the naked eye in more than 7 days on subculture are termed slow growers.
They can cause disease in humans.

Nonchromogenic

Rough

Smooth

Smooth to rough

Small and transparent

Photochromogenic

Yellow and smooth
Yellow and rough

Scotochromogenic

Yellow

Yellow-orange

Rose-pink