1. A 75-year-old m an was adm itted to the hospital for hip replacem ent. Which of the follow ing antibiotics would be an appropriate prophylactic agent to be given before surgery? A. Metronidazole B....

1. A 75-year-old m an was adm itted to the hospital for hip replacem ent. Which of the follow ing antibiotics would be an appropriate prophylactic agent to be given before surgery? A. Metronidazole B. Tetracycline C. Sulfam ethoxazole D. Aztreonam E. Cefazolin F. Erythromycin 2. An 8-year-old girl was brought to the clinic because of fever (101.5°F, 38.6°C) and extensive skin abrasions on the right leg. Her m other explained that the girl had fallen o her bicycle a few days earlier and su ered several abrasions. Physical exam ination showed the skin of the right leg was hot, red, and edem atous w ith a surface “peau d’orange” appearance. Regional lym phadenopathy was also present. A Gram stain from scrapings of the lesions showed the presence of a large num ber of gram -positive cocci. Which of the follow - ing drugs would be appropriate for the treatm ent of this patient? A. Piperacillin B. Aztreonam C. Dicloxacillin D. Tetracycline E. Amikacin