A 23-year-old intravenous drug user is hospitalized with fever and fatigue. You obtain the following dynamics of serologic markers in this patient (see the graph below).

This patient most likely:A. Had acute hepatitis B and successfully recoveredB. Had an exacerbation of preexisting hepatitis BC. Had acute hepatitis B that progressed to chronic hepatitis with low infectivityD. Had acute hepatitis B that progressed to chronic hepatitis with high infectivityE. Was vaccinated against HBV during the hospitalizationA 23-year-old intravenous drug user is hospitalized with fever and fatigue. You obtain the following dynamics of serologic markers in this patient (see the graph below).

This patient most likely: A. Had acute hepatitis B and successfully recovered B. Had an exacerbation of preexisting hepatitis B C. Had acute hepatitis B that progressed to chronic hepatitis with low infectivity D. Had acute hepatitis B that progressed to chronic hepatitis with high infectivity E. Was vaccinated against HBV during the hospitalization

A 5-year-old Caucasian male is brought to the ER with fever and a new skin rash (see the slide below). One week ago, his younger sister had similar symptoms that resolved spontaneously.

Which of the following is the most likely diagnosis given this patients symptoms? A. Rubella B. Scarlet fever C. Roseola infantum D. Erythema infectiosum E. Hand-foot-and-mouth diseaseAn 82 year-oled man has had bleeding gums, several loose teeth, and bruises on his legs over the past 3 weeks. His lower extremities are shown. He has prepared his own meals since his wife died 4 months ago. Which of the following is most likely to be abnormal in this patient?

A.Bone mineralizationB.Collagen synthesisC.DNA metabolismD.Gamma carboxylationE.Thiamine phosphorylationPhysical examination shows marked conjunctival injection and erythema and edema of the hands and feet.Echocardiography shows dilation of the proximal coronary arteries. Dx?

A.Acute rheumatic feverB.EhrlichiosisC.Erythema multiformeD.Scarlet feverE.Mucocutaneous lymph node syndrome