Changes

The bacteria are large, motile, Gram positive rods that produce endospores. They are aerobes or facultative anaerobes and are catalase positive and oxidase negative. They grow on non-enriched media.  

The bacteria are large, motile, Gram positive rods that produce endospores. They are aerobes or facultative anaerobes and are catalase positive and oxidase negative. They grow on non-enriched media.  

''[[Bacillus anthracis]]'' colonies are up to 5mm diameter, flat, dry and grey with a ground-glass appearance. Curled outgrowths from the edge of the colony give a 'medusa head' appearance. They are non-haemolytic and can be differentiated from ''[[Bacillus cereus]]''.

''[[Bacillus anthracis]]'' colonies are up to 5mm diameter, flat, dry and grey with a ground-glass appearance. Curled outgrowths from the edge of the colony give a 'medusa head' appearance. They are non-haemolytic and can be differentiated from ''[[Bacillus cereus]]'' as ''B.cereus'' is a beta hemolytic bacterium.  

''[[Bacillus licheniformis]]'' forms dull, rough, wrinkled colonies, with hair-like outgrowths.

''[[Bacillus licheniformis]]'' forms dull, rough, wrinkled colonies, with hair-like outgrowths.

''Bacillus'' species can often tolerate adverse environmental conditions.

''Bacillus'' species can often tolerate adverse environmental conditions.