]> 2026-07-31T09:40:10+00:00 WBR0058 0 en Erythromycin Erythromycin is a macrolide used to treat atypical pneumonias Doxycycline Doxyclince is a tetracycline used to treat Lyme disease. Penicillin Penicillin is a beta-lactam antibiotic used to treat some gram-positive organisms, some gram-negative organisms, and syphilis. Trimethoprim-Sulfamethoxazole (TMP-SMX) Trimethoprim-Sulfamethoxazole (TMP-SMX) inhibits dihyrofolate reductase and may used to treat UTIs, and ''Pneumocystis jirovecii'' infection in HIV-positive patients. Ciprofloxacin Ciprofloxacin is a fluoroquinolone which inhibits DNA gyrase and is used to treat gram-negative rods and ''Pseudomonas aeruginosa''. Microbiology Pharmacology William J Gibson (Reviewed by Yazan Daaboul) A 27-year-old woman presents to her primary care physician complaining of fever, flu-like symptoms, and a rash. She recently returned from a camping trip in Boston. Physical examination is remarkable for erythema chronicum migrans. What is the optimal treatment for this patient? B Dermatology General Principles Infectious Disease 2020-10-27T23:11:33Z 2459150.4663542 WBR0058