| Category A | Category B | Category C |
|---|---|---|
| Bacillus anthracis (anthrax) | Coxiella burnetii (Q fever) | Various equine encephalitic viruses |
| Variola major (smallpox) | Vibrio cholerae (cholera) | |
| Yersinia pestis (plague) | Burkholderia mallei (glanders) | |
| Clostridium botulinum (botulism) | Enteric pathogens (Escherichia coli 0157:H7, salmonella, shigella) | |
| Francisella tularensis (tularemia) | Cholera, cryptosporidium | |
| Viral hemorrhagic fever (Ebola, Lassa, Marburg, Argentine) | Various encephalitic viruses Various biologic toxins |