Red Meat Inspection Flashcards
What are the statutory meat inspection protocols?
- Visual
- Palpation
- Incision
Variable with species and age
What are the aims of meat inspection?
Assessment of:
* Pathology
* Presence of SRM/faces
* Gross pathology
* Evidence for residues or contaminants
What is checked PM on head, tongue and throat of an >8mo
- 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
On an >8mo bovine what visual inspection is carried out on trachea, oesophagus and lungs?
What is inspected on pericardium and heart of >8mo?
- 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
What is inspected for >8mo bovine in the Liver, GI/mesentery, spleen and kidneys
- 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
What is inspected for >8mo bovine in the Liver, GI/mesentery, spleen and kidneys
Abdomen
- 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
What is visually inspected in the remaining carcass of >8mo bovine?
- Palpation/incision of udder and LNs
- Each half of udder shall be opened by long deep incision to lactiferous sinuses
What other treatments can be used to control trichinella spiralis?
How can people be infected?
Freezing pork carcases instead of testing
Inactivation- freezing/cooking
Zoonotic- infection by consumption of undercooked meat, life threatening to mild symptoms for 5-20days
What cold treatments can be done for C.bovis infestation?
- Can be boned out prior to cold treatment- AO but be satisfied
What orther further actions can happen with red meat inspection?
- 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
The following images show a head, tongue and throat
Identify the lymph nodes
What are the following lymph nodes of the lungs labelled?
Cranial- tracheobronchial
Caudal- mediastinal
What are the following lymph nodes of the lungs labelled?
Cranial- tracheobronchial
Caudal- mediastinal
What influences meat fitness decisions?
CHORD
* Change
* Humans
* Organ
* Repercussions
* Disease status
- Zoonotic infection if ingested or systemic process
- Not zoonotics but- prevention of animal disease spread, quality, aesthetics
What generalised conditions cause meat to be unfit for human consumption?
- Septicaemia
- Pyaemia
- Jaundice
- Emaciation
- Toxaemia
- Viraemia
- Malignant tumours
How can meat unsure of fitness for human consumption be tested?
Hold carcase for 24 hours and check boiling/frying test
Unfit if smell still present
- What is the most common malignancy in cattle?
- What age does it affect?
- What are the two forms
- Sporadic bovine lymphosarcoma
- 6mo to 2 years
- 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
- What changes does erysipelothrix rhusiopathie cause?
- When is it allowed for human consumption?
Changes due to necrosis/infarction
* Judgment depending on lesions
* Acute or septicaemic- total rejection
* Chronic- local or total depending on severity
What happens with arthritis PM findings?
- 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
Are carcases with jaundice fit for human consumption?
No they are unfit
What does this image show?
Partial or full rejection
Haemochromatosis
What are the differentials for this image?
Unfit or fit for human consumption?
Anaemia or white muscle disease
Unfit for human consumption
What does this image show?
Unfit or not?
Hydrocachexia- emaciation with serous atrophy of adipose tissue
Unfit for human consumption
What condition does this show?
Partial or full rejection?
Callus formation following fracture
Partial rejection
