Food Manager Practice Exam

Which strain of E. Coli is particularly dangerous and can cause severe illness in children and the elderly?

1. O157: H7

2. O26: H11

3. O111: H8

4. O145: H7

The correct answer is: O157: H7

The strain of E. coli known as O157:H7 is particularly dangerous because it produces a potent toxin called Shiga toxin, which can lead to severe gastrointestinal illness and complications like hemolytic uremic syndrome (HUS), especially in vulnerable populations such as children and the elderly. This syndrome is characterized by the destruction of red blood cells, kidney failure, and can potentially be life-threatening. The severity of the illness associated with O157:H7 has been well-documented in outbreaks, which often result from consuming contaminated food or water. The characteristics of this strain make it a significant public health concern, prompting strict food safety efforts and guidelines to prevent contamination and outbreaks. The other strains mentioned, while they may also be pathogenic, do not have the same level of associated risk or public health impact as O157:H7, particularly regarding severe outcomes in high-risk groups. Thus, O157:H7 stands out as the strain to prioritize in discussions of food safety and risk management.