Ciprofloxacin in the treatment of gram-positive bacterial peritonitis in patients undergoing CAPD.

Fluoroquinolones may be a good alternative for the treatment of bacterial peritonitis in patients undergoing continuous ambulatory peritonitis dialysis (CAPD). To test their efficiency against Gram-positive bacteria, we treated with intraperitoneal (i.p.) ciprofloxac in 30 episodes of Gram-positive bacterial peritonitis without manifest tunnel infection of the peritoneal catheters. Treatment was sustained for 5 days, then orally for 10 further days. Clinical and bacteriological responses were satisfactory in 25 cases, but resolution of infection was slow in 5 cases of Staphylococcus aureus. The minimal inhibitory and bactericidal concentrations were 0.0625-0.50 and 0.125-1.0 micrograms/mL respectively, lower than the plasma and dialysate concentrations of the drug. Side effects were negligible. We conclude that ciprofloxacin provides a good therapeutic alternative to more widely used antibiotics for the empirical treatment of peritonitis in patients undergoing CAPD. However, combinations of antibiotics may be necessary, in Staphylococcus aureus peritonitis.