Which antibiotic is effective against MRSA ocular infections?

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Study for the NBEO Part II TMOD Exam. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

Which antibiotic is effective against MRSA ocular infections?

Explanation:
When an ocular infection is due to MRSA, you need an antibiotic with activity against MRSA rather than a beta-lactam. Doxycycline, a tetracycline, inhibits protein synthesis by binding the 30S ribosomal subunit and retains activity against many MRSA strains. It also penetrates ocular tissues well, and systemic doxycycline can help treat lid and ocular surface infections caused by MRSA when used alongside appropriate topical therapy. In contrast, beta-lactam antibiotics like dicloxacillin and amoxicillin (with or without clavulanate) are generally ineffective against MRSA because of altered penicillin-binding proteins, making them unreliable for MRSA ocular infections.

When an ocular infection is due to MRSA, you need an antibiotic with activity against MRSA rather than a beta-lactam. Doxycycline, a tetracycline, inhibits protein synthesis by binding the 30S ribosomal subunit and retains activity against many MRSA strains. It also penetrates ocular tissues well, and systemic doxycycline can help treat lid and ocular surface infections caused by MRSA when used alongside appropriate topical therapy. In contrast, beta-lactam antibiotics like dicloxacillin and amoxicillin (with or without clavulanate) are generally ineffective against MRSA because of altered penicillin-binding proteins, making them unreliable for MRSA ocular infections.

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