USMLEGladiator
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11. A 30-year-old man develops fever, malaise, and a rash on his palms and soles. He frequently hikes in a wooded area near his home and removed an engorged tick from his thigh 1 week ago. Laboratory studies show a leukocyte count of 5500/mm3, a platelet count of 85,000/mm3, and a serum sodium concentration of 128 mEq/L. Which of the following best describes the mechanism of action of the drug of first choice for this condition?
A. Alters capillary permeability
B. Binds to Beta-lactamases
C. Blocks protein synthesis
D. Inhibits transpeptidase
E. Opens ion channels
i think it is ROCKY MOUNTAIN SPOTTED FEVER.
WHAT IS DRUG OF CHOICE?
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| USMLEGladiator
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13. A 40-year-old man comes to the physician because of a 3-month history of midepigastric discomfort that is relieved by eating. His vital signs are normal. Physical examination shows mild epigastric tenderness to palpation. Test of the stool for occult blood is positive. Endoscopy shows a gastric ulcer with heaped-up margins surrounded by edema and inflammation. A biopsy specimen is placed in media containing phenolphthalein. En route to the laboratory, the color of the media changes from yellow to red. Which of the following best explains the change in media pH?
A. Bacterial catalase
B. Bacterial CO2 production
C. Bacterial oxidase
D. Bacterial urease
E. Gastric acid
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| mazinger
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First question C I think of tetracyclines (Im gathering this data from my long term memmory I could be wrong) Inhibit protein synthesis.. Second question I think D urease, H pillory has urease activity..
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original mazinger z
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| robin082006
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right mazinger
11 C
12 D
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| DrVirgo
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I agree with 11. C and 13. D.
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