Plague should be included on a differential list in non-endemic areas because:

Plague should be included on a differential list in non-endemic areas because:

• A. Animals may have traveled to endemic areas
• B. The disease may be newly emerging in non-endemic areas
• C. It is caused by an agent that might be used by a bioterrorist
• D. All of the above

Answer: (D)

Plague should be considered in non-endemic areas because it can appear there through movement, emergence, or deliberate use, making any single location vulnerable unless clinicians keep it in mind. Animals and their fleas can travel with infestations or be moved by people and goods, introducing Yersinia pestis into new environments and starting local transmission cycles. Ecological or social changes can likewise bring the disease into an area where it wasn’t previously present, as new rodent hosts or flea vectors establish a foothold and human cases follow. And because Yersinia pestis is a potential bioterrorism agent, unusual outbreaks or clusters of compatible illness—even in places with no history of plague—warrant prompt consideration to enable rapid diagnosis, isolation when needed, and public health response. So recognizing all these pathways, plague belongs on the differential in non-endemic areas.

Plague should be considered in non-endemic areas because it can appear there through movement, emergence, or deliberate use, making any single location vulnerable unless clinicians keep it in mind. Animals and their fleas can travel with infestations or be moved by people and goods, introducing Yersinia pestis into new environments and starting local transmission cycles. Ecological or social changes can likewise bring the disease into an area where it wasn’t previously present, as new rodent hosts or flea vectors establish a foothold and human cases follow. And because Yersinia pestis is a potential bioterrorism agent, unusual outbreaks or clusters of compatible illness—even in places with no history of plague—warrant prompt consideration to enable rapid diagnosis, isolation when needed, and public health response. So recognizing all these pathways, plague belongs on the differential in non-endemic areas.