FSS Foodborne Illness 1 — Questions and Answers
Question 1: Which bacterium is most commonly associated with raw poultry and eggs in Australia?
- Salmonella (Correct answer)
- Listeria monocytogenes
- Clostridium botulinum
- Bacillus cereus
Correct answer: Salmonella
Salmonella is predominantly found in raw poultry and eggs and is one of the most common causes of foodborne illness in Australia.
Question 2: What is the typical incubation period for Salmonella food poisoning?
- 1 to 4 hours
- 6 to 72 hours (Correct answer)
- 3 to 5 days
- 7 to 14 days
Correct answer: 6 to 72 hours
Salmonella typically causes symptoms between 6 and 72 hours after consuming contaminated food, depending on the dose and individual health.
Question 3: Staphylococcus aureus food poisoning is dangerous because its toxins:
- Multiply rapidly in the human gut
- Are destroyed by standard refrigeration
- Are heat-stable and survive cooking once formed (Correct answer)
- Require live bacteria to cause illness
Correct answer: Are heat-stable and survive cooking once formed
Staphylococcus aureus produces heat-stable toxins in food before consumption, meaning reheating or cooking cannot destroy them once they have formed.
Question 4: Which high-risk group faces the most severe complications from Listeria monocytogenes infection?
- Pregnant women and their unborn babies (Correct answer)
- Healthy adults aged 25 to 40
- School-aged children
- People with mild seasonal allergies
Correct answer: Pregnant women and their unborn babies
Listeria can cross the placenta and cause miscarriage, stillbirth, or serious neonatal illness, making pregnant women the highest-risk group.
Question 5: What term describes foodborne illness caused by consuming preformed toxins already present in food?
- Food infection
- Food intoxication (Correct answer)
- Toxin-mediated infection
- Biological contamination
Correct answer: Food intoxication
Food intoxication occurs when a person ingests toxins already produced by bacteria in the food, such as those from Staphylococcus aureus or Clostridium botulinum.
Question 6: Campylobacter jejuni is the leading cause of bacterial foodborne diarrhoea in Australia and is most commonly transmitted via:
- Raw shellfish
- Unpasteurised dairy
- Undercooked poultry (Correct answer)
- Unwashed root vegetables
Correct answer: Undercooked poultry
Campylobacter is most frequently transmitted through undercooked chicken and is the most common bacterial cause of foodborne gastroenteritis in Australia.
Question 7: What does the term 'incubation period' mean in the context of foodborne illness?
- The time food must be kept below 5°C to remain safe
- The time bacteria take to double in number within food
- The minimum cooking time required to destroy pathogens
- The time between consuming contaminated food and the first onset of symptoms (Correct answer)
Correct answer: The time between consuming contaminated food and the first onset of symptoms
The incubation period is the elapsed time between ingesting a contaminated food or pathogen and the appearance of the first signs of illness.
FSS Foodborne Illness 1
Which bacterium is most commonly associated with raw poultry and eggs in Australia?