Bacillus and Clostridium — Flashcards

Clostridium is a gram _____ rod

All Clostridia are gram _____, spore-forming, obligate anaerobes

Hint: ...and shape

Bacillus anthracis and cereus are gram-_____ bacilli (rods)

Gram-positive rod-shaped bacillus with _____ spherical spores is suggestive of Clostridium _____.

_____ difficile; botulinum; perfringens; tetani are all obligate anaerobes

_____ degrades phosphatidylcholine and sphingomyelin, resulting in myonecrosis (muscle breakdown)

Hint: which exotoxin

Bacillus anthracis is often described as large _____ in chains

Hint: shape/stain

School of fish/railroad track appearance on Gram stain is suggestive of _____

Which subtype of diphtheria bacilli shows 'poached egg' colonies (flat with central elevation)? _____

Which subtype of diphtheria bacilli shows 'frog egg' colonies (dark centre, light margins)? _____