Clostridium difficile infection in the elderly.

Clostridium difficile-associated illness is an increasingly prevalent and morbid condition. The elderly population is at a disproportionate risk of developing symptomatic disease and associated complications, including progression to severe or fulminant disease, and development of recurrent infections. This article analyzes the factors that influence C difficile disease propensity and severity, with particular attention directed toward features relevant to the rapidly aging population.