Clinical | Any person with at least one of bilateral cranial nerve impairment (e.g. diplopia, blurred vision, dysphagia, bulbar weakness) or peripheral symmetric paralysis. |
Epidemiological | Use of illicit drugs by any route within the 2 weeks prior to onset of symptoms. |
Microbiological | Isolation of Clostridium botulinum from infected wound and/or detection of botulinum toxin in a clinical specimen. |