CPFS Foodborne Illness & Pathogens

Question 1

What temperature range is known as the 'danger zone' in which foodborne pathogens grow most rapidly?

Accepted Answer

41°F to 135°F

Answer

The danger zone is 41°F to 135°F (5°C to 57°C), where most pathogens multiply rapidly and food should not be held for more than 4 hours total.

Question 2

Which pathogen is most commonly associated with undercooked poultry and is the leading cause of bacterial foodborne illness in the United States?

Accepted Answer

Campylobacter jejuni

Answer

Campylobacter jejuni is the most frequently reported bacterial cause of foodborne illness in the US and is strongly linked to undercooked poultry and raw milk.

Question 3

Which characteristic of the toxin produced by Staphylococcus aureus makes it especially dangerous in foodservice?

Accepted Answer

It is heat-stable and survives cooking temperatures

Answer

Staphylococcal enterotoxin is heat-stable and can survive temperatures that kill the bacteria, meaning reheating contaminated food will not eliminate the toxin.

Question 4

Hepatitis A virus outbreaks in foodservice are most often traced to which source?

Accepted Answer

An infected food handler with poor personal hygiene

Answer

Hepatitis A is primarily spread via the fecal-oral route, and infected food handlers who do not wash hands properly after using the restroom are the most common source in foodservice outbreaks.

Question 5

Which foodborne pathogen is responsible for producing a preformed toxin that causes illness within 1–6 hours after ingestion?

Accepted Answer

Staphylococcus aureus

Answer

Staphylococcus aureus produces a preformed enterotoxin in food, resulting in rapid symptom onset (typically 1–6 hours) including nausea, vomiting, and stomach cramps.

(CPFS) Certified Professional in Foodservice Sanitation Practice Test

(CPFS) Certified Professional in Foodservice Sanitation Practice Test

CPFS Foodborne Illness & Pathogens