Which virus is most common cause of sporadic cases and outbreaks of foodborne illness?

Which virus is most common cause of sporadic cases and outbreaks of foodborne illness?

• A. Norovirus
• B. Hepatitis A
• C. Hepatitis E
• D. Rotovirus

Answer: (A)

Norovirus stands out because it spreads so easily and persists in the environment, making it the most common driver of both single cases and outbreaks of foodborne illness. A tiny amount of this virus can cause infection, so contamination of food, surfaces, or water can lead to illness even when the contamination isn’t obvious. It remains stable on countertops, utensils, and in foods like shellfish or ready-to-eat produce for extended periods and is shed in large amounts by infected people, often before symptoms appear and for a short time after recovery. This combination of a very low infectious dose, environmental stability, and rapid person-to-person transmission fuels rapid, widespread outbreaks, especially in settings like schools, care facilities, and food-service operations. While Hepatitis A and E can cause foodborne illness and Rotavirus is a major cause of gastroenteritis in children, none are as consistently implicated in the majority of foodborne outbreaks as Norovirus.

Norovirus stands out because it spreads so easily and persists in the environment, making it the most common driver of both single cases and outbreaks of foodborne illness. A tiny amount of this virus can cause infection, so contamination of food, surfaces, or water can lead to illness even when the contamination isn’t obvious. It remains stable on countertops, utensils, and in foods like shellfish or ready-to-eat produce for extended periods and is shed in large amounts by infected people, often before symptoms appear and for a short time after recovery. This combination of a very low infectious dose, environmental stability, and rapid person-to-person transmission fuels rapid, widespread outbreaks, especially in settings like schools, care facilities, and food-service operations. While Hepatitis A and E can cause foodborne illness and Rotavirus is a major cause of gastroenteritis in children, none are as consistently implicated in the majority of foodborne outbreaks as Norovirus.