Microbiota Accessible Carbohydrates Suppress Clostridium difficile in a Murine Model

Abstract

Clostridium difficile (Cd) is an opportunistic diarrheal pathogen and Cd infection (CDI) represents a major healthcare concern, causing an estimated 15,000 deaths per year in the United States alone1. Several enteric pathogens, including Cd, leverage inflammation and the accompanying microbial dysbiosis to thrive in the distal gut2. Although diet is among the most powerful available tools for affecting the health of humans and their relationship with their microbiota, investigation into the effects of diet on CDI has been limited. Here, we show in mice that the consumption of microbiota accessible carbohydrates (MACs) found in dietary plant polysaccharides has a significant impact on CDI. Specifically, using a model of antibiotic-induced CDI that typically resolves within 12 days of infection, we demonstrate that MAC-deficient diets perpetuate CDI. We show that Cd burdens are suppressed through ...