14. Regressive changes in the stomach. Pathogenesis of gastric ulceration Flashcards
regressive changes of stomach
oedema of wall
haemorrhagic infiltration of wall
necrosis of mm
peptic erosions & ulcers
dystrophic calciphication of mm
types of necrosis of stomach
colliquation/coagulation
spf/deep
circumscribed/deep
causes of necrosis
circulatory disturbance
bacteria
mould, toxoplasma
gastric juice
mordant chemicals
necrosis causing bacteria
fusobacterium necrophorum
ulcus definition
penetrating mucosal defect through lamina muscularis mucosae
development of peptic erosions & ulcers
decreased resistance against autodigestion
forms of peptic erosions & ulcers
round
oval
cone
staged
terraced
days necrotized for ulcer
1 days
days necrotized for peptic ulcer
3-4days
what is a fistula
when the necrosis arrodes all layers
healing of erosion
ad integrum
healing of ulcer
granulation tissue in base, overgrown by epithelium
mechanical causes of erosions
rough, harsh string fodder in calves
bacteria causing prolonged gastritis
helicopbacter
gastric ulcers in swine
intense farming
breed dependent
lesions on pars oe