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)
Frequently asked questions
What is Clostridium botulinum?
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.
What is the Gram stain of Clostridium botulinum?
Clostridium botulinum is Gram positive.
What are the lab clues for Clostridium botulinum?
Lab clues for Clostridium botulinum include Spore-forming anaerobe, Toxin detection concept, and Grows in low-oxygen sealed containers vocabulary.
What is Clostridium botulinum commonly confused with?
Clostridium botulinum is commonly confused with Clostridium tetani and Guillain-Barre (ascending vs descending pattern).
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.