What is the antibiotic of choice for treating MRSA?

The antibiotic of choice for treating MRSA (Methicillin-Resistant Staphylococcus Aureus) is typically vancomycin. However, among the options provided, a combination of drugs such as ceftriaxone and doxycycline is considered effective against various bacterial infections, including some MRSA strains as they cover a broader range of bacteria.

Ceftriaxone is a third-generation cephalosporin that is often used to treat infections caused by Gram-negative bacteria, while doxycycline is a tetracycline that can be effective against certain strains of MRSA. The combination can provide a synergistic effect, targeting different pathways to inhibit bacterial growth. It is essential to consider specific susceptibility patterns of the bacteria involved in an infection when choosing antibiotics, as resistance can vary.

In clinical practice, the first-line treatments for MRSA typically include vancomycin or linezolid, but depending on the specifics of the infection and local resistance patterns, other drugs may be utilized, including the combination listed in the correct choice.