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Bugs + Drugs
Antimicrobials
| Drug of choice | Bug |
|---|---|
| Penicillin G | Spirochetes |
| Penicillin G | Strep except Enterococcus |
| Penicillin G | Staph Saprophyticus |
| Penicillin G | Clostridia except C. difficile |
| Penicillin G | Corynebacterium |
| Penicillin G | Actinomyces |
| Penicillin G | N. meningitidis |
| Ampicillin/Amoxicillin | Listeria |
| Ampicillin/Amoxicillin | Borrelia burgdorferi |
| Amp/Amox + AG | Enterococcus |
| Amp/Amox + AG | S. pneumo when Otitis Media, Sinusitis |
| Nafcillin | S. aureus |
| Piperacillin | Pseudomonas |
| 2nd generation cephalosporins (Cefoxitin, Cefuroxime) | Gram negative bacilli |
| Ceftriaxone | Chlamydia |
| Ceftriaxone | Meningitis |
| Vancomycin | MRSA |
| Vancomycin | Enterococcus |
| Vancomycin | C. difficile |
| Daptomycin | VRE |
| Macrolides | Pneumococcal pneumonia |
| Macrolides | S. pyogenes |
| Macrolides | Gram neg bacilli (enteric + non-enterics) |
| Clindamycin | Bacillus cereus |
| Clindamycin | Can use for S. aureus |
| Tetracyclines (Doxycycline) | Chlamydia |
| Tetracyclines (Doxycycline) | Rickettsiae |
| Tetracyclines (Doxycycline) | Vibrio |
| Tetracyclines (Doxycycline) | N. gonorrheae |
| Tetracyclines (Doxycycline) | Bacillus anthracis |
| Tetracyclines (Doxycycline) | Borrelia |
| TMP/SMX | Nocardia |
| TMP/SMX | Gram neg bacilli (enteric + non-enterics) |
| FQs (Ciprofloxacin) | Bacillus anthracis |
| FQs (Ciprofloxacin) | Gram neg bacilli (enteric + non-enterics) |
| Metronidazole | Giardia |
| Metronidazole | Trichomonas |
| Metronidazole | Bacterioides Fragilis |