Certified Healthcare Safety Professional (CHSP) Practice Exam

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MRSA is known for its resistance to what?

All antibiotics
Certain antibiotics
Vaccines
Antivirals

The correct answer is: Certain antibiotics

Methicillin-resistant Staphylococcus aureus (MRSA) is specifically known for its resistance to certain antibiotics, particularly beta-lactam antibiotics, which include methicillin, penicillin, and amoxicillin. This antibiotic resistance can pose significant challenges in clinical settings, as it limits the treatment options available for infections caused by MRSA. While MRSA is not resistant to all antibiotics, it can be susceptible to some other classes of antibiotics, such as clindamycin or vancomycin, depending on the strain and susceptibility profile. However, the presence of MRSA indicates a specific subset of Staphylococcus aureus that has acquired resistance mechanisms, primarily due to the mecA gene, which makes it resistant to methicillin and related drugs. Vaccines and antivirals are not applicable in the context of MRSA, as MRSA is a bacterial infection, and vaccines for staphylococcal infections are not yet widely available. Antivirals are designed to target viruses, not bacteria, and thus do not play a role in treating MRSA infections. Therefore, the most accurate characterization of MRSA’s resistance profile relates to certain antibiotics rather than an absolute resistance to all antibiotics or other treatment modalities.