<prompt> Treatment of choice of campylobacter-TetracyclineAmpicillinErythromycinCiprofloxacin  <response>: Fluid and electrolyte replacement is central to the treatment of diarrheal illnesses. Indications for therapy include high fever, bloody diarrhea, severe diarrhea, persistence for 1 week, and worsening of symptoms. A 5- to 7-day course of erythromycin 250 mg orally four times daily or--for children--30-50 mgkg per day, in divided doses is the regimen of choice. Both clinical trials and in vitro susceptibility testing indicate that other macrolides, including azithromycin a 1- or 3-day regimen, also are useful therapeutic agents. An alternative regimen for adults is ciprofloxacin 500 mg orally twice daily or another fluoroquinolone for 5-7 days, Harrisons Principles of internal medicine, 20 th edition, page 1288 