[Relapsing infections with Clostridium difficile].
Two women, aged 78 and 85 years, presented with watery diarrhoea and fever after a course of antibiotic therapy. Pseudo-membranous colitis was diagnosed, which was adequately treated. In both patients the C. difficile colitis relapsed, which was successfully treated with a pulse and tapering scheme of vancomycin. C. difficile infection is a frequent cause of antibiotic-associated diarrhoea. Clinical presentation can vary in severity. Cytotoxin testing, immunoassay and endoscopy are important tools in diagnosing C. difficile colitis. Like the first infection, the first relapse must be treated with metronidazole or vancomycin. To treat a second relapse, a pulse and tapering dose of vancomycin has been recommended. Nevertheless, multiple recurrences may occur, which are difficult to treat.