What is a characteristic feature of Yersinia enterocolitica?

What is a characteristic feature of Yersinia enterocolitica?

• A. It is heat-stable enterotoxin-producing.
• B. It thrives at cooler temperatures.
• C. It is a spore-forming bacterium.
• D. It is strictly anaerobic.

Answer: (B)

Yersinia enterocolitica is known for its ability to thrive at cooler temperatures, particularly around 4°C, which is relatively cold compared to many other pathogenic bacteria. This characteristic allows it to survive and multiply in refrigerated foods, making it a concern in food safety. The ability to grow at these lower temperatures is a significant factor in the epidemiology of yersiniosis, as it can be transmitted through consumption of contaminated foods, such as pork products and unpasteurized dairy. In contrast, other options describe features that do not apply to Yersinia enterocolitica. The organism does not produce heat-stable enterotoxins, is not a spore-forming bacterium, and it is not strictly anaerobic; Yersinia enterocolitica is typically classified as a facultative anaerobe, meaning it can grow in the presence or absence of oxygen. Understanding the unique characteristics of this bacterium helps in identifying its behavior in various environments and its role in foodborne illnesses.

Yersinia enterocolitica is known for its ability to thrive at cooler temperatures, particularly around 4°C, which is relatively cold compared to many other pathogenic bacteria. This characteristic allows it to survive and multiply in refrigerated foods, making it a concern in food safety. The ability to grow at these lower temperatures is a significant factor in the epidemiology of yersiniosis, as it can be transmitted through consumption of contaminated foods, such as pork products and unpasteurized dairy.

In contrast, other options describe features that do not apply to Yersinia enterocolitica. The organism does not produce heat-stable enterotoxins, is not a spore-forming bacterium, and it is not strictly anaerobic; Yersinia enterocolitica is typically classified as a facultative anaerobe, meaning it can grow in the presence or absence of oxygen. Understanding the unique characteristics of this bacterium helps in identifying its behavior in various environments and its role in foodborne illnesses.