Two cases of adult botulism caused by botulinum neurotoxin-producing Clostridium baratii

Type F botulism occurs rarely in clinical cases. Two cases of type F botulism in elderly patients that were clustered in time and space are described. Clostridium baratii producing type F botulinum neurotoxin was isolated from both patients; molecular typing of these isolates revealed that they were unrelated strains. •Type F botulism in humans is rare and not associated with outbreaks.•We describe 2 cases that presented within 8 days in the same geographic area.•No epidemiological link was established; PFGE determined the cases are unrelated.•Clinical presentation of type F botulism is discussed.•Culture and strain typing of rare organisms useful for investigation.