ENARE multiprofessional residency Milk & Meat Hygiene, Food Safety & Public Health: practice questions

1 · Residues and maximum residue limits · medium

The most sensitive toxicological study of a veterinary drug gives a NOAEL of 5 mg/kg body weight per day. Using an uncertainty factor of 100, what is the ADI and the corresponding daily amount for a 60 kg adult?

1. 50 µg/kg bw per day; 3 mg per day
2. 500 µg/kg bw per day; 30 mg per day
3. 50 µg/kg bw per day; 0.05 mg per day
4. 500 mg/kg bw per day; 30,000 mg per day

2 · Residues and maximum residue limits · hard

Using a model daily diet of 300 g muscle, 100 g liver, 50 g kidney, 50 g fat and 1.5 kg milk, residues are 50, 200, 400, 100 and 20 µg/kg in those foods. The ADI is 2 µg/kg bw per day for a 60 kg person. What share of the ADI does the diet supply?

1. 642%
2. 45%
3. 75%
4. 50%

3 · Milk hygiene · medium

Why are wet teats undesirable when the milking cluster is attached?

1. Water dilutes the milk and lowers its fat and solids-not-fat content below standard
2. Dirty water runs down into the liners and carries bacteria and spores into the milk
3. Water activates the lactoperoxidase system
4. Water blocks the release of oxytocin

4 · Milk-borne zoonoses · medium

In an HTST pasteuriser, what happens when the milk temperature at the end of the holding tube falls below the set point?

1. The flow diversion valve sends the milk back to the raw side
2. The regenerator pressure is reversed
3. The holding tube is lengthened automatically to extend the holding time
4. The milk is passed but recorded

5 · Ante-mortem inspection · easy

A bullock is found dead in the lairage with dark unclotted blood oozing from the nostrils and anus. What should be done?

1. Do not open the carcass; notify and arrange safe disposal as suspected anthrax
2. Open the carcass to confirm the diagnosis
3. Slaughter and dress it separately at the end of the day, then send blood for testing
4. Send it for normal post-mortem inspection

6 · Post-mortem inspection and judgement of carcasses · medium

A carcass from a pig with multiple abscesses in the lungs, liver, kidneys and carcass lymph nodes should be:

1. Passed after trimming the abscesses
2. Passed after heat treatment
3. Passed if the abscesses are encapsulated
4. Totally condemned as pyaemia

7 · Food-borne infections · medium

Why is Taenia solium more dangerous to people than Taenia saginata?

1. T. solium adult worms are much larger
2. T. solium is transmitted by mosquitoes
3. People who swallow T. solium eggs develop cysticercosis, including neurocysticercosis
4. T. solium cysts cannot be killed by cooking or freezing, so all infected pork remains a risk

8 · HACCP · medium

Why must good hygiene practices (prerequisite programmes) be in place before HACCP is applied?

1. HACCP replaces them once implemented
2. Without them HACCP tries to control at a few points what must be controlled everywhere
3. They are only needed for export plants
4. They are the same thing as critical control points, simply described under a different name

9 · Food safety standards and legislation: Codex and national regulators · medium

Which WTO agreement names Codex as the reference for food safety standards?

1. The Agreement on the Application of Sanitary and Phytosanitary Measures
2. The Agreement on Technical Barriers to Trade, which covers all food standards
3. The Agreement on Agriculture
4. The TRIPS Agreement

10 · Post-mortem inspection and judgement of carcasses · medium

During cattle dressing, why are the oesophagus tied and the rectum bagged before evisceration?

1. To make the carcass heavier
2. To help bleeding
3. To prevent rumen and faecal contents leaking onto the carcass
4. To make post-mortem inspection of the lungs and heart quicker and easier