VMC 311: Systematic Veterinary Bacteriology and Mycology (2+1)

DIFFERENCES BETWEEN ANTHRAX AND ANTHRACOIDS

Sl. No	Characters	B. anthracis	Anthracoids
1.	Motility	-	+
2.	Haemolysis	- (or weak)	+ usually marked
3.	Penicillin sensitivity 10 unit disc	S	R
4.	Gelatin stab culture	‘inverted fir tree’ type of growth (slow liquefaction)	Rapid liquefaction
5.	Lecithinase activity on egg yolk agar	-- weak	+ marked
6.	Presence of Capsule	+	-
7.	Susceptibility to cherry gamma phage	+ (lysis)	-
8.	Pathogenicity for mice or guinea – pigs	+ (death in 24 – 48 hours)	-
9.	Position of spores	Central,do not bulge the bacillus	Central,subterminal or terminal,may bulge the bacillus