Micro & Immunology · single question
Clindamycin does NOT have activity against which organism?
Show answer and explanation
Correct answer: D. Pseudomonas aeruginosa
Pseudomonas aeruginosa is intrinsically resistant to clindamycin. Clindamycin covers most anaerobes and gram-positive cocci but NOT aerobic gram-negative rods.
- A. ❌ Clindamycin HAS activity against Streptococcus viridans.
- B. ❌ Clindamycin HAS activity against Fusobacterium species.
- C. ❌ Clindamycin HAS activity against B. fragilis — a key clinical use.
- D. ✅ CORRECT – Pseudomonas aeruginosa has intrinsic resistance to clindamycin.
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