The Stagnant Loop Syndrome, also known as the Bacterial Overgrowth Syndrome, occurs when increased bacterial colonization occurs in the small intestine, either as a result of underlying disease, drug therapy or surgery. It may present with fat, carbohydrate and vitamin malabsorption. The fat malabsorption is caused by breakdown of the bile acids required for fat absorption by the luminal bacteria. Carbohydrates are fermented by the bacteria before they can be absorbed.
