Bioterrorism would be suspected if anthrax is diagnosed in which scenario?

Bioterrorism would be suspected if anthrax is diagnosed in which scenario?

• A. In several workers at an abattoir
• B. In both humans and animals at the same time in the Dakotas
• C. In several dead cattle after heavy storms
• D. In people, cattle and dogs in Washington

Answer: (D)

Bioterrorism would be suspected when anthrax infections appear across multiple species in a single area, indicating a common environmental source released deliberately rather than a typical, species-specific outbreak. The scenario where people, cattle, and dogs are infected in the same location (Washington) shows a broad host range in one place, which is unusual for natural anthrax events and strongly suggests a coordinated release that could affect various hosts. In contrast, several dead cattle after heavy storms fit with a natural environmental exposure pattern, since storms can bring spores to the surface and cause outbreaks in herbivores without involving humans or other species. An outbreak among several workers at an abattoir could reflect occupational exposure from handling contaminated material but doesn’t demonstrate the cross-species, multi-host pattern that would raise stronger suspicion of deliberate dissemination.

Bioterrorism would be suspected when anthrax infections appear across multiple species in a single area, indicating a common environmental source released deliberately rather than a typical, species-specific outbreak. The scenario where people, cattle, and dogs are infected in the same location (Washington) shows a broad host range in one place, which is unusual for natural anthrax events and strongly suggests a coordinated release that could affect various hosts.

In contrast, several dead cattle after heavy storms fit with a natural environmental exposure pattern, since storms can bring spores to the surface and cause outbreaks in herbivores without involving humans or other species. An outbreak among several workers at an abattoir could reflect occupational exposure from handling contaminated material but doesn’t demonstrate the cross-species, multi-host pattern that would raise stronger suspicion of deliberate dissemination.