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Year 4 Public Health > Red Meat Inspection > Flashcards

Red Meat Inspection Flashcards

1
Q

What are the statutory meat inspection protocols?

A
  • Visual
  • Palpation
  • Incision
    Variable with species and age
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2
Q

What are the aims of meat inspection?

A

Assessment of:
* Pathology
* Presence of SRM/faces
* Gross pathology
* Evidence for residues or contaminants

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3
Q

What is checked PM on head, tongue and throat of an >8mo

A
  • Incision and examination of the retropharyngeal lymph nodes, external masseters
  • 2 parallel incission to the mandible and internal masseters
  • Incision and examinatino of the sub-maxillary and parotic lymph nodes
  • Palpation of the tongue and fauces
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4
Q

On an >8mo bovine what visual inspection is carried out on trachea, oesophagus and lungs?

What is inspected on pericardium and heart of >8mo?

A
  • Bronchial and mediastinal lymph nodes
  • Palpation of lungs
  • Mediastinal lymph nodes
  • Opening of trachea and main bifurcation
  • Incised in their posterior third
  • Lengthways incision of the heart so as to cut open the ventricles and through IV septum
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5
Q

What is inspected for >8mo bovine in the Liver, GI/mesentery, spleen and kidneys

A
  • Palpation of liver and hepatic and pancreatic LNs
  • Incision of gastric surface of liver and at base of caudate lobe to examine bile ducts
  • Palpation of the gastric and mesenteric LN
  • Incision of mesenteric LN
  • Palpation of spleen
  • Incision of kidneys and renal LNs
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5
Q

What is inspected for >8mo bovine in the Liver, GI/mesentery, spleen and kidneys

Abdomen

A
  • Palpation of liver and hepatic and pancreatic LNs
  • Incision of gastric surface of liver and at base of caudate lobe to examine bile ducts
  • Palpation of the gastric and mesenteric LN
  • Incision of mesenteric LN
  • Palpation of spleen
  • Incision of kidneys and renal LNs
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6
Q

What is visually inspected in the remaining carcass of >8mo bovine?

A
  • Palpation/incision of udder and LNs
  • Each half of udder shall be opened by long deep incision to lactiferous sinuses
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7
Q

What other treatments can be used to control trichinella spiralis?
How can people be infected?

A

Freezing pork carcases instead of testing
Inactivation- freezing/cooking

Zoonotic- infection by consumption of undercooked meat, life threatening to mild symptoms for 5-20days

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8
Q

What cold treatments can be done for C.bovis infestation?

A
  • Can be boned out prior to cold treatment- AO but be satisfied
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9
Q

What orther further actions can happen with red meat inspection?

A
  • Trimming of contamination inc SRM
  • Removal of affected part in case of localised lesion
  • Carcase that passes re-inspection after 24 hrs- odour no longer present
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10
Q

The following images show a head, tongue and throat
Identify the lymph nodes

A
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11
Q

What are the following lymph nodes of the lungs labelled?

A

Cranial- tracheobronchial
Caudal- mediastinal

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11
Q

What are the following lymph nodes of the lungs labelled?

A

Cranial- tracheobronchial
Caudal- mediastinal

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12
Q

What influences meat fitness decisions?

A

CHORD
* Change
* Humans
* Organ
* Repercussions
* Disease status

  • Zoonotic infection if ingested or systemic process
  • Not zoonotics but- prevention of animal disease spread, quality, aesthetics
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13
Q

What generalised conditions cause meat to be unfit for human consumption?

A
  • Septicaemia
  • Pyaemia
  • Jaundice
  • Emaciation
  • Toxaemia
  • Viraemia
  • Malignant tumours
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14
Q

How can meat unsure of fitness for human consumption be tested?

A

Hold carcase for 24 hours and check boiling/frying test
Unfit if smell still present

15
Q
  1. What is the most common malignancy in cattle?
  2. What age does it affect?
  3. What are the two forms
A
  1. Sporadic bovine lymphosarcoma
  2. 6mo to 2 years
  3. Multicentric- all the lymph nodes enlarged and replaced by white homogenous tissue
    Thymic- large swelling in both cadiac and cervical thymus

Unfit for human consumption

16
Q
  1. What changes does erysipelothrix rhusiopathie cause?
  2. When is it allowed for human consumption?
A

Changes due to necrosis/infarction
* Judgment depending on lesions
* Acute or septicaemic- total rejection
* Chronic- local or total depending on severity

17
Q

What happens with arthritis PM findings?

A
  • Non-septic- synovial fluid clear/opaque, little cartilagenous wear, slight hyperamie- PASS
  • Non-septic severe- increased fluid, blood coloured/cloudy, synovial villi- Reject affected joint
  • Septic arthritis- swollen joint, thickened, lymph nodes enlarged- Whole carcass if septicaemic, more then one joint
18
Q

Are carcases with jaundice fit for human consumption?

A

No they are unfit

19
Q

What does this image show?
Partial or full rejection

A

Haemochromatosis

20
Q

What are the differentials for this image?
Unfit or fit for human consumption?

A

Anaemia or white muscle disease

Unfit for human consumption

21
Q

What does this image show?
Unfit or not?

A

Hydrocachexia- emaciation with serous atrophy of adipose tissue
Unfit for human consumption

22
Q

What condition does this show?
Partial or full rejection?

A

Callus formation following fracture
Partial rejection

23
Q

What are the DDxs, the DX?
Partial or full rejection?

A

DDxs- Abcess, contamination with foreign material
Dx- calcification

Partial rejection

24
Q

What do these two images show?

A

Actinomyces bovis- lumpy jaw
Actinobacillus ligniersi- wooden tongue

25
Q

What do the two lungs show?

A

Left- embolic pneumonia
Right- Muellerius capillarius (sheep/goat lung worm)

26
Q

What causes milk spot liver in piggies?

A

Ascaris summ

27
Q

What sheep condition do these images show?

A
  • Cysticercus tenuicollis
28
Q

What condition do these images show?

A

Echinococcus granulosus
Thickened, laminated outer membrane and filled with clear fluid

29
Q

Human tapeworm- Taenia saginata
What cyst?
Should it be condemned?

A

Cysticercus bovis
One cyst- localised- reject affected area
More then one- reject organ/carcase
Generalised- reject carcass and offal

Year 4 Public Health (13 decks)

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