| type a botulism in horses in the united states: a review of the past ten years (1998-2008). | the objective of the current retrospective study was to describe naturally occurring type a botulism in horses in the united states. in the past 10 years, the botulism laboratory at the university of pennsylvania's school of veterinary medicine has identified 3 isolated cases and 8 outbreaks of type a botulism in horses via samples positive for clostridium botulinum type a toxin or spores using the mouse bioassay test. additional information was obtained by review of submission forms and by tele ... | 2010 | 20224073 |