Which action is NOT recommended to prevent Seoul virus introduction?

Which action is NOT recommended to prevent Seoul virus introduction?

• A. Maintain a closed rat colony
• B. Let rats from unknown sources join existing colony
• C. Quarantine new rats
• D. Avoid rat shows/swaps/barn hunts

Answer: (B)

Preventing Seoul virus introduction relies on strict biosecurity around rat populations: keep the colony closed, carefully manage any new animals, and avoid activities that mix different groups. Seoul virus is shed in the urine and feces of infected rats and can be carried by asymptomatic individuals. A closed colony prevents new potentially infected animals from entering. Quarantining new rats provides time to observe for signs of illness and to detect infection before they join the main group. Avoiding rat shows, swaps, and barn hunts reduces opportunities for infected animals to move between colonies and spread the virus. Letting rats from unknown sources join the existing colony bypasses these protections, greatly increasing the risk of introducing Seoul virus. This is why that action is not recommended.

Preventing Seoul virus introduction relies on strict biosecurity around rat populations: keep the colony closed, carefully manage any new animals, and avoid activities that mix different groups. Seoul virus is shed in the urine and feces of infected rats and can be carried by asymptomatic individuals. A closed colony prevents new potentially infected animals from entering. Quarantining new rats provides time to observe for signs of illness and to detect infection before they join the main group. Avoiding rat shows, swaps, and barn hunts reduces opportunities for infected animals to move between colonies and spread the virus. Letting rats from unknown sources join the existing colony bypasses these protections, greatly increasing the risk of introducing Seoul virus. This is why that action is not recommended.