Necrosis
Microorganisms
Physical and chemical agents
Hypersensitivity
Duration - acute, chronic
Distribution- focal, diffuse
Exudate- serous, purulent, fibrinous
Tissue name - hepatitis, myocarditis
Peracute acute subacute chronic
Serous
Catarrhal
Fibrinous
Hemorrhagic
Purulent
Necrotizing
Granulomatous
Horse
Acute focally extensive necrotizing stomatitis
Cow
Focal purulent encephalitis (also cerebral abscess)
Cow
Chronic proliferative pericarditis
Dog
Acute diffuse fibrinous enteritis
Goat
Diffuse hemorrhagic cystitis
Vascular changes
Vessels dilate and become leaky
Leukocytes and endothelium “talk” to each other
Leukocytes in axial flow
Normal axial flow
Margination
Margination
Adhesion
Leukocyte integrins interact
with the ICAMS and VCAMS
Firm adhesion
Emigration Emigration
NEUTROPHILS
Eosinophils
Macrophages
purulent paronychia
Duration - acute, chronic
Distribution- focal, diffuse
Exudate- serous, purulent, fibrinous
Tissue name - hepatitis, myocarditis
Type I
Type II
Type III
Type IV
Vesicular dermatitis
Vascular components much less pronounced
Hallmark is MACROPHAGES
Usually some fibrous tissue
Chronic ulcerative dermatitis
Bone – a system all its own
Heart, Brain – doesn’t happen!