Bacterium
Clostridium botulinum
Flaccid-paralysis canned-food anaerobe
klos-TRID-ee-um bot-yoo-LYE-num
High-yield clue
Botulinum toxin blocks acetylcholine release at the neuromuscular junction to cause descending flaccid paralysis; home-canned foods and honey in infants are the classic sources.
Overview
An obligate anaerobic, spore-forming Gram-positive rod producing botulinum toxin, the most potent biological toxin and a classic cause of descending flaccid paralysis. It anchors the paired contrast with tetanus in coursework.
Classification
- Gram-positive
- Rod
- Obligate anaerobe
- Spore-forming
Lab & identification clues
- Spore-forming anaerobe
- Toxin detection concept
- Grows in low-oxygen sealed containers vocabulary
Associations
- Improperly home-canned foods
- Infant botulism linked to honey ('floppy baby' vocabulary)
- Descending flaccid paralysis and diplopia presentation vocabulary
Commonly confused with
- Clostridium tetani
- Guillain-Barre (ascending vs descending pattern)
Your notes
Original student-study summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment, dosing, or specimen-handling guidance.