Category:Enteritis, Fibrinous/Haemorrhagic

Pathology

  • The mucosa eroded to produce lesions of darkish-red submucosa covered in dry, crumbly fibrin.
  • Is usually caused by severe damage due to secondary bacterial infection following an earlier milder insult.
  • Tends to be more severe in the lower small intestine and upper large intestine.
    • Many severe infections tend to get worse further down the gut.
    • In the lower aprt of the bowel, where the inflammation is more severe, disease is more anaerobic.
      • Lesions are caused by anaerobic organisms- convert mild diseases into more serious disease.

Salmonellosis

Swine Dysentery

Parvovirus Enteritis

Bacterial septicaemia and enteritis

  • Some severe acute septicaemias cause very severe acute haemorrhagic enteritis with bleeding into the alimentary tract.
  • Death is usually rapid.
  • Fairly easy to diagnose
    • small intestine is full of dark, tarry, partly clotted blood (like black currant jelly).
  • Associated with severe systemic disease, e.g.
  • Do not confuse with warfarin poisoning.
    • Also gives blood in stomach and intestine BUT there are no signs of inflammatory disease.

Lamb Dysentery (Enterotoxaemia with Blood)

Clinical

  • Lamb dysentery is usually seen in lambs under 2 weeks of age.
    • Related to being kept in a cold, dirty environment, with build-up of infection during the lambing season.
  • Lambs may produce bloodstained diarrhoea before death, but they often die before this effect is apparent.
  • Diagnosed by culturing contents of gut.

Pathology

Gross
  • The gut is blown and distended with foamy ,bloody contents.
  • Sometimes ulceration with perforation and fibrinousperitonitis is seen.
  • Focal or diffuse congestion and haemorrhages.
Histological
  • Coagulative necrosis of villi.
  • Oedema.
  • Haemorrhage.
  • Influx of inflammatory cells in the lamina propria and submucosa.


Similar Conditions

  • Piglets show similar disease caused by Clostridium perfringens type C (and sometimes type B)
    • May look similar to a volvulus but with no twist present.
  • In adult sheep Clostridium perfringens type B infection causes Struck.
    • Enterotoxigenic gastritis.
    • Acute sudden death with haemorrhagic enteritis
    • Haemorrhagic enteritis is not as severe as in lambs, and tends to be more patchy.

Colitis X

  • Affects the horse.
  • Sudden onset with haemorrhages throughout body (shock) and sometimes acute foul smelling diarhoea.
  • colon is acutely haemorhagic and oedematous with mucosal necrosis.
  • Associated with Clostridium perfringens.
  • Possibly an enterotoxaemia.

Pages in category "Enteritis, Fibrinous/Haemorrhagic"

The following 6 pages are in this category, out of 6 total.