Pathology of poultry Flashcards
What condition predisposes chicken to have ascites
Low ventilation rates
Acute Heart Failure is caused by
Triggered by ‘stress’
Chickens that appear DOA. Do we accept or reject
Reject
A farm has >2000 chickens is salmonella testing required
Yes. EC 2160/2003 requirestesting of flocks of turkeys and chickens
Birds tested on farm- results BEFORE they leave the farm
Is poor defeathering a total rejection
Yes
Judgement for fractures/brusing
Judgement: Trim if localised or total rejection if severe and extensive
Judgement for shackling damage
Judgement: Trim if localised or total if severe and extensive
Judgement for over scald
Judgement: Total rejection
What happens if chicken has machine damage
Judgement: Trim if localised or total if severe and extensive
Judgement for faecal contamination
Total rejection
Judgement for Emaciation and congestion
Total rejection
How does Coliform cellulitis appear at PM
Brown/yellow discolouration of tissue often involving back/thigh/caudal abdomen
Predisposing factors for coliform cellulitis
Skin damage
husbandry, previous lameness, lighting etc.
Poor litter hygiene
What happens if chicken has Coliform cellulitis
Partial if localised
Total if generalised + systemic effects
Predisposing factors for contact dermatitis
Lameness may predispose
The common link is poor litter management (due to poor ventilation, poor gut health etc)
Judgement for pododermatitis
Partial rejection
Judgement for dehydration and anemia
Total rejection
Judgement for jaundice
Total rejection
Judgement for Congenital defect in abdominal skin
partial / total depending on severity
Judgement for Mutilated carcases
Partial/complete rejection
Colibacillosis can cause lesions post mortem at
Airsacculitis, pericarditis, perihepatitis and peritonitis
Judgement for Perihepatitis/Peritonitis
Total rejection
Judgement for Pericarditis
Partial rejection (or total if associated secondary condition)
Judgement for Airsacculitis and pericarditits
Partial
Or total if secondary condition OR Salmonella spp.
Judgement for Hepatitis
Partial OR total if systemic
Coccidiosis is caused by
Intracellular protozoal parasites
Eimeria spp mostly in chickens
Judgement for Congenital keel bone abnormality
Partial rejection
What is Deep pectoral myopathy (aka Oregon disease)
Ischaemic damage to deep pectoral muscle due to rapid growth rate (genetics) and/or excessive exercise of the muscle (wing flapping)
What is wooden breast
Likely related to increased growth rates. Recently described in broilers
Cause: oxidative damage
What is White striping in broilers
White stripes parallel to muscle fibres
Related to increased growth rate
As fat content increases and protein content decreases in muscle, the incidence of white striping increases
What age is end of lay hens
80 weeks
Judgement for Salpingitis
Partial if localised
OR total if secondary condition
Judgement for Coliform cellulitis
Partial rejection OR total (if systemic)
