Morphology
i)
shape – it is usually a small oval rod with rounded
ends and convex sides . swollen
involution forms are frequently found .
ii)
size – it is about 1.5 μ in length and 0.6 μ in breadth
.
iii)
Pleomorphism is the characteristic feature .
iv)
Non-flagellated , so non-motile
v)
Non-sporing
vi)
Gram negative bacillus .
Important members of paterulla pestis
i)
Pateurella lepiseptica – present in rabbies
ii)
Pasteurella oviseptica- present is sheep .
iii)
Pasteurella muriseptica- present in mice
iv)
Pasteurella aviseptica – present in fowls .
v)
Pasteurella pseudotuberculosis – present in guineapig
vi)
Pasteurella oestis – present in man .
Pathology produced by Pasteurella pestis
In man four types
of infections occur like –
a) Bubonic
plague
b) Pneuonic
plague
c) Septicaemic
plague
d) Cellolo-cutaneous
plague
