The drug of choice for methicillin-resistant staphylococcus aureus (MRSA) is:
Gentamicin
Nafcillin
Vancomycin
Penicillin
The Correct Answer is C
A. Gentamicin: Gentamicin is an aminoglycoside antibiotic effective against many bacteria, but it's not the first choice for MRSA. Vancomycin or other alternatives are preferred due to the rising resistance of MRSA to gentamicin.
B. Nafcillin: Nafcillin is a penicillin antibiotic, often used for penicillin-sensitive staphylococcal infections. However, it is not effective against MRSA, which is resistant to many penicillin-based antibiotics.
C. Vancomycin: Vancomycin is a glycopeptide antibiotic used to treat a variety of bacterial infections, including MRSA. It works by inhibiting cell wall synthesis in bacteria, making it effective against Gram-positive bacteria that have developed resistance to other antibiotics like methicillin (which MRSA has).
D. Penicillin: Penicillin is a group of antibiotics that includes drugs like amoxicillin and ampicillin. MRSA is resistant to penicillin-based antibiotics, so they are not effective against MRSA infections.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Reddened tongue and gums: This side effect is not typically associated with ampicillin. However, certain medications or medical conditions can cause changes in oral tissues, leading to redness in the tongue and gums.
B. Digit numbness and tingling: Ampicillin does not commonly cause numbness and tingling in the fingers and toes. These symptoms can be associated with neurological issues or circulatory problems.
C. Bruising and petechiae: These symptoms can indicate bleeding disorders or low platelet count and are not usually caused by ampicillin. It's essential to investigate further if a patient experiences unexplained bruising or petechiae.
D. Skin rash and loose stools: Skin rash is a known side effect of penicillin-type antibiotics, including ampicillin. Loose stools or diarrhea can also occur due to disruption of the gut flora caused by the antibiotic. Patients should be aware of these possibilities and report any severe or persistent symptoms to their healthcare provider.
Correct Answer is A
Explanation
A. Ceftaroline (Teflaro) is a fifth-generation cephalosporin antibiotic that is effective against MRSA (Methicillin-Resistant Staphylococcus Aureus). It's the first cephalosporin in its class with this capability, making it a valuable choice in treating MRSA infections.
B. Cefepime (Maxipime) is a fourth-generation cephalosporin that does not have specific activity against MRSA.
C. Ceftriaxone (Rocephin) is a third-generation cephalosporin, effective against a wide range of bacteria, but not specifically targeted at MRSA.
D. Cephalexin (Keflex) is a first-generation cephalosporin, primarily effective against Gram-positive bacteria, but not effective against MRSA.
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