MK MEDICAL COURSES
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MCCQE , NAC OSCE, USMLE STEPS 1,2,3
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Q63/ A 36 YO male presents to his primary care physician for a physical examination and health maintenance visit. He feels well and is not a member of a high-risk group for HIV exposure, but he wants to be screened for HIV infection. A new HIV test states that in a clinical trial, 205 patients with HIV given the test resulted in 200 patients receiving positive test results and 5 patients receiving negative test results. Of the 520 patients without HIV who were given the new HIV test, 10 patients had positive test results and 510 had negative test results. If the patient's test result is positive, what is the probability he has the disease?
A. 10 I 520
B. 200 I 205
C. 200 I 210
D. 510 I 515
E. 510 I 520
Q64/ A 43 YO female with AIDS presents to the infectious disease clinic with a 2-week history of fatigue, fever, night sweats, weight loss, and diarrhea. She has been poorly compliant with her highly active antiretroviral therapy and azithromycin prophylaxis. Temperature is 39°C, heart rate is 98/min, respiratory rate is 20/min, and blood pressure is 100/70 mm Hg. Examination reveals a cachectic female with generalized muscle wasting. Cardiac, respiratory, and abdominal examinations are unremarkable. Complete blood count reveals pancytopenia. Her CD4+ cell count is 40/mm3. What is the recommended treatment for this condition?

A. Amphotericin B and flucytosine
B. Caspofungin
C. Sulfadiazine and pyrimethamine
D. Trimethoprim-sulfamethoxazole
E. Clarithromycin and azithromycin
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Q82/ A 28-year-old male presents to your office looking quite concerned. Several days ago after sexual intercourse with his girlfriend, he noticed bloody ejaculate in the condom. Since then he has avoided sex and masturbation. He denies pain, hematuria, dysuria, fevers, night sweats, and weight loss. He reports that he is otherwise healthy. His examination, including genitourinary and rectal exam, is normal, and a urinalysis shows 1–2 RBCs/hpf.
Whatisyournextstepintheevaluationandmanagement of this patient?
A. Reassurance and follow-up.
B. Scrotal ultrasound.
C. Pelvic CT scan.
D. Transrectal ultrasound.
E. PSA.