1- Post-mortem inspection Flashcards
What is the aims of the post-mortem inspection
Supplement Ante-mortem and detect
- Diseases
- Residues (abcesses from injections) or contaminants
- Contamination
- Other -unfit for human consumption.
- Animal welfare
Who carries out the post-mortem
Meat health inspectors commonly but OV will can also (unusual conditions/Emergency situations)
If an animal had arthritis in 1 joint what happens?
Partial rejection of that joint only, rest of carcass passes.
What LN do you need to check for TB?
Retropharyngeal & mesenteric LN
If a cow has Taenia Saginata (C.Bovis) at slaughter what do you do?
If local = partial rejection of heart + freezing
Generalised = Total rejection
What happens if bovine TB is suspected in a carcass
APHA notified immediately as it is a notifiable disease
T/F rejection of the whole carcass occurs in fasciola hepatica
False (only the liver)
What happens if pericarditis is found in the heart
Partial rejection of the heart
What happens if endocarditis is found PM
If only heart affected- partial rejection
If heart and skin affected- total rejection
If a sheep has Taenia Ovis (C. ovis) at slaughter what do you do?
Localised- partial rejection of heart
Generalised- total rejection
What is Hydatidosis?
Caused by dog tapeworm = Echinoccus granulisos
Causes cysts located in lungs, liver
What pathological feature is seen in ascaris suum?
Milk spot on the liver
What happens if pneumonia seen PM
Partial rejection
Describe a control program for hydatidosis
Educate public.
Treat dogs (praziquantel).
Control access by dog to offal.
Good meat inspection => condemn offal
What happens if Milk spot seen in liver
Partial rejection of liver
What happens if peritonitis is seen PM
Depends on severity to if full or partial rejection
List some reasons for full carcase condemnation
Emaciation
Jaundice
Fevered (Septicaemia/Toxaemia)
DOA, DIL, Unborn Or under 7 days
Generalised Oedema
Pyemia- lots of abscesses around the carcass???
Abnormal odours (uraemia, acetonemia)
No ante-mortem
List some signs seen in emaciated carcases
Shrunken
pale/ wet muscles
slimy/ gelatinous
Lymph nodes enlarged/watery
What is melanosis? & is the carcass passed at slaughter?
Increased melanin in tissues
Partial rejection of affected tissue
Who does the health marks
- OV
- MHI- generally them
- FBO
Always done under supervision of OV
What is the procedure that is followed when performing a PM
Take in to account AM
View all external surfaces
Look for any evidence of notifiable/zoonotic diseases
Take into account FCI- mostly in poultry
Must include carcases and accompanying offal
If there is no evidence of generalised disease or recent medication, what happens
The carcase is passed for human consumption
If during PM there is evidence of recent meds, what happens
Test for residues
-Passed for human consumption if neg
- Condemn carcass if positive
If there is evidence of localised disease condition at PM, what is the next step and the outcome
Remove affect tissue
Rest passed for human consumption
List 4 reasons for total rejection of cow carcase
Oedema/ emaciation
Generalised TB
pyaemia/ multiple abcesses
Septicaemia/ fever
Hydatidosis
Jaundice
Navel ill
Abnormal odour
Cysticercus bovis- in multiple locations
Contamination
List 4 reasons for total rejection of sheep carcase
Septicaemia/ fever
Jaundice
contamination
Cysticercus ovis- generalised
Hydatidosis
Emaciation/ generalised oedema
multiple abscess
generalised tuberculosis
polyarthritis
contamination
What additional inspections are requires if bovine TB is suspected
the prescapular and superficial inguinal lymph node must be inspected
What 4 things could cause lungs to be rejected at PM
pneumonia
pleurisy
lungworm
abscesses
What is another name for Distomatosis
Liver fluke- caused by Fasciola hepatica
What 3 things do you take samples to test for at the abattoir
Aujezsky’s disease
Residues
Trichinella
What is the procedure for testing for Trichinella
Breeding pigs, all wild boars
testing of muscle tissue
condemn carcase until passed test
