Ontario Food Handler Certificate Food-Borne Illness Prevention 2 — Questions and Answers
Question 1: How long can symptoms of a food-borne illness take to appear after consuming contaminated food?
- Always within 1 hour
- Within 30 minutes to 72 hours only
- From 30 minutes to several weeks (Correct answer)
- Only after 24 hours
Correct answer: From 30 minutes to several weeks
Depending on the pathogen, food-borne illness symptoms can appear from 30 minutes (as with Staphylococcus aureus toxin) to several weeks (as with Listeria or Hepatitis A).
Question 2: Which population group is MOST vulnerable to severe food-borne illness?
- Teenagers
- Young adults
- Elderly individuals (Correct answer)
- Middle-aged adults
Correct answer: Elderly individuals
Elderly individuals have weakened immune systems and are part of the high-risk YOPI group (Young, Old, Pregnant, Immunocompromised), making them more susceptible to severe illness.
Question 3: Which virus is the leading cause of food-borne gastroenteritis in Ontario?
- Hepatitis A
- Rotavirus
- Norovirus (Correct answer)
- HIV
Correct answer: Norovirus
Norovirus is the most common cause of food-borne gastroenteritis outbreaks. It is highly contagious and can spread through contaminated food, surfaces, or person-to-person contact.
Question 4: What is the primary way Clostridium botulinum causes food-borne illness?
- It produces spores that infect the intestines
- It produces a potent neurotoxin in low-oxygen environments (Correct answer)
- It multiplies rapidly in acidic foods
- It causes allergic reactions in sensitive individuals
Correct answer: It produces a potent neurotoxin in low-oxygen environments
C. botulinum thrives in anaerobic (low-oxygen) conditions such as improperly canned foods and produces a deadly neurotoxin that causes botulism.
Question 5: A food handler reports having diarrhea and vomiting. What should the operator do according to Ontario regulations?
- Allow them to work if they wear gloves
- Assign them to cashier duties only
- Exclude them from working with food until symptom-free for at least 24 hours (Correct answer)
- Let them decide if they feel well enough to work
Correct answer: Exclude them from working with food until symptom-free for at least 24 hours
Ontario regulations require that food handlers with symptoms of vomiting or diarrhea be excluded from food handling duties until they have been symptom-free for at least 24 hours to prevent contamination.
Question 6: Which of the following is an example of a biological hazard in food?
- Glass fragments in salad
- Pesticide residue on fruit
- Salmonella in raw chicken (Correct answer)
- Allergens in peanut butter
Correct answer: Salmonella in raw chicken
Salmonella is a biological hazard — a living organism that can cause disease. Glass is a physical hazard, pesticide residue is a chemical hazard, and allergens are a separate category.
