Repeated USMLE Questions- Step 2 CK- 452

Q- Which of the following is the most common causative organism of epididymitis in elderly patients?

A- Chlamydia

B- E-Coli

C- Gonococci

D- Streptococci

B- E-Coli- In elderly patients, epididymitis is most commonly caused by enteric bacteria, with E. coli being the most frequent pathogen. This is in contrast to younger, sexually active men, where sexually transmitted pathogens like Chlamydia trachomatis and Neisseria gonorrhoeae are more common causes.



Q- Which one of the following antibiotics is the empiric treatment of cellulitis in a diabetic patient?

A- Amoxicillin

B- Imipenem

C- Neomycin

D- Vancomycin

D- Vancomycin- Diabetic patients with cellulitis are at higher risk for infections caused by more resistant organisms, including Methicillin-resistant Staphylococcus aureus (MRSA). Empiric treatment often needs to cover both typical skin pathogens like Streptococcus species and MRSA. Vancomycin is commonly used for empiric treatment in these cases due to its efficacy against MRSA.



Q- Which one of the following is the most common cause of vitiligo?

A- Autoimmune

B- Chemical

C- Infection

D- Trauma

A- Autoimmune- Vitiligo is most commonly caused by an autoimmune process where the body’s immune system attacks the melanocytes, the cells responsible for producing skin pigment.



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9 thoughts on “Repeated USMLE Questions- Step 2 CK- 452”

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