Pathology of poultry

Question 1

What condition predisposes chicken to have ascites

Answer 1

Low ventilation rates

Question 2

Acute Heart Failure is caused by

Answer 2

Triggered by ‘stress’

Question 3

Chickens that appear DOA. Do we accept or reject

Answer 3

Reject

Question 4

A farm has >2000 chickens is salmonella testing required

Answer 4

Yes. EC 2160/2003 requirestesting of flocks of turkeys and chickens
Birds tested on farm- results BEFORE they leave the farm

Question 5

Is poor defeathering a total rejection

Answer 5

Yes

Question 6

Judgement for fractures/brusing

Answer 6

Judgement: Trim if localised or total rejection if severe and extensive

Question 7

Judgement for shackling damage

Answer 7

Judgement: Trim if localised or total if severe and extensive

Question 8

Judgement for over scald

Answer 8

Judgement: Total rejection

Question 9

What happens if chicken has machine damage

Answer 9

Judgement: Trim if localised or total if severe and extensive

Question 10

Judgement for faecal contamination

Answer 10

Total rejection

Question 11

Judgement for Emaciation and congestion

Answer 11

Total rejection

Question 12

How does Coliform cellulitis appear at PM

Answer 12

Brown/yellow discolouration of tissue often involving back/thigh/caudal abdomen

Question 13

Predisposing factors for coliform cellulitis

Answer 13

Skin damage
husbandry, previous lameness, lighting etc.
Poor litter hygiene

Question 14

What happens if chicken has Coliform cellulitis

Answer 14

Partial if localised
Total if generalised + systemic effects

Question 15

Predisposing factors for contact dermatitis

Answer 15

Lameness may predispose
The common link is poor litter management (due to poor ventilation, poor gut health etc)

Question 16

Judgement for pododermatitis

Answer 16

Partial rejection

Question 17

Judgement for dehydration and anemia

Answer 17

Total rejection

Question 18

Judgement for jaundice

Answer 18

Total rejection

Question 19

Judgement for Congenital defect in abdominal skin

Answer 19

partial / total depending on severity

Question 20

Judgement for Mutilated carcases

Answer 20

Partial/complete rejection

Question 21

Colibacillosis can cause lesions post mortem at

Answer 21

Airsacculitis, pericarditis, perihepatitis and peritonitis

Question 22

Judgement for Perihepatitis/Peritonitis

Answer 22

Total rejection

Question 23

Judgement for Pericarditis

Answer 23

Partial rejection (or total if associated secondary condition)

Question 24

Judgement for Airsacculitis and pericarditits

Answer 24

Partial
Or total if secondary condition OR Salmonella spp.

Question 25

Judgement for Hepatitis

Answer 25

Partial OR total if systemic

Question 26

Coccidiosis is caused by

Answer 26

Intracellular protozoal parasites
Eimeria spp mostly in chickens

Question 27

Judgement for Congenital keel bone abnormality

Answer 27

Partial rejection

Question 28

What is Deep pectoral myopathy (aka Oregon disease)

Answer 28

Ischaemic damage to deep pectoral muscle due to rapid growth rate (genetics) and/or excessive exercise of the muscle (wing flapping)

Question 29

What is wooden breast

Answer 29

Likely related to increased growth rates. Recently described in broilers
Cause: oxidative damage

Question 30

What is White striping in broilers

Answer 30

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

Question 31

What age is end of lay hens

Answer 31

80 weeks

Question 32

Judgement for Salpingitis

Answer 32

Partial if localised
OR total if secondary condition

Question 33

Judgement for Coliform cellulitis

Answer 33

Partial rejection OR total (if systemic)