Peritoneum (LS) Flashcards
List the 3 routes of infection that cause Peritonitits.
- direct → perforating lesions
- hematogenous
- release of bile or pancreatic enzymes
List the 6 types of Peritonitis
- Fibronous
- Fibrinohemorrhagic
- Suppurative
- Pyogranulomatous
- Granulomatous
- Chemical
Etiology of Fibrinous Peritonitis
- FIP
- Mycoplasma hyorhinis
- Glasser’s Dz (Hemophilus spp.)
- Blackleg
Lesions of Fibrinous Peritonitis
- yellow sheets & strands of fibrin adhered to viscera
- excess serous to serosangiuneous fluid in the cavity
Sequelae of Fibrinous Peritonitis.
- complete resolution
- healing w/ fibrous adhesions
- Septicemia → death
When is Fibrinohemorrhagic peritonitis often seen?
- Most cases of Clostridial hemoglobinuria
- some cases of blackleg & septicemic pastuerellosis
4 Causes of Suppurative Peritonitis
- contaminated wound (post castration)
- contaminated abdonimal SX
- ruptured organs
- “Hardware Dz”
Lesion of Suppurative Peritonitis
- red peritoneum w/ deposits of pus
- scattered abscesses
Sequelae of Suppurative Peritonitis
- Recovery if abscess is walled off
- chronic infection & emaciation
Suppurative Peritonitis in Horses?
- almost always fatal
- Most commonly due to rupture or performation of stomach or intestine
- R. equi in foals w/ infected umbilicus
What 2 agents cause very characteristic pyogranulomatous or granulomatous peritonits in Dogs?
- Nocardia
- Actinomyces
What causes pyogranulomatous peritonitis in Cats?
FIP
Pearl Dz. (TB) causes what form of peritonitis?
Granulomatous peritonitis
3 Exogenous causes of Chemical Peritonitis?
- Intraperitoneal injections
- SX glove powder
- accidental spillage of barium sulfate
3 Endogenous causes of Chemical Peritonitis?
- bile & pancreatic enzymes
- leakage of chyle from a ruptured lymphatic
- cystitis & rupture of urinary bladder
Sequelae of Peritonitis?
death from septicemia
Lesions of abdominal fat necrosis?
(2)
- foci of white, necrotic adipose tissue surrounded by zone of intense hyperemia w/ fibrin deposits
- chicken soup peritoneal fluid
List the 3 types of abdominal fat necrosis.
- Pancreatic
- Focal necrosis→ sheep
- massive necrosis (lipomatosis) → cattle
Lipomatosis if most frequently reported in what type of cattle?
- Channel Island breeds - Jersey, Guernsey and the Alderney.
- excessively fat cattle
Lesions of “Wet” form of FIP
(Cornavirus)
extensive fibrin & fluid accumulation in the abdomen
Lesions of “Dry” form of FIP?
scattered, white foci of pyogranulomatous inflammaton on the surface & extending into the viscera
Common lesions of FIP?
May have:
- pleuritis
- ophthalmitis
- meningitis
List the Primary Neoplasms of the Peritoneum
(5)
- Mesotheliomas → cattle & dog
- Lipomas→ horse & dog
- Myxomas
- Fibromas
- Neurofibromatosis →cattle
Lipomas in Horses orginate from where? Consequences?
- mesentary
- pedunculated
- may reach enormous size → acute strangulation obstruction of the intestine
