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* Can cause vascular fragility, leading to [[General Pathology - Haemostasis#Haemorrhagic Disease Due To Vascular Fragility|haemorrhagic disease]].
* Can cause vascular fragility, leading to [[General Pathology - Haemostasis#Haemorrhagic Disease Due To Vascular Fragility|haemorrhagic disease]].
===Overview===
*Mostly non-pathogenic environmental organisms
*''Bacillus anthracis'' causes anthrax
*''Bacillus licheniformis'' may cause shoradic abortions in cattle and sheep
*''Bacillus cereus'' causes food poisoning in humans and mastitis in cows
===Characteristics===
*Large, Gram positive rods
*Produce endospores
*Aerobes or facultative anaerobes
*Grow on non-enriched media
*Motile
*Catalase positive, oxidase negative
*''Bacillus anthracis'' colonies are up to 5mm diameter, flat, dry, grey, with a ground-glass appearance; curled outgrowthsfrom the edge of the colony give a 'medusa head' appearance; non-haemolytic (differentiate from ''Bacillus cereus'')
*''Bacillus licheniformis'' forms dull, rough, wrinkled colonies, with hair-like outgrowths
*Biochemical tests for identification
*Can often tolerate adverse environmental conditions
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