A genus of Gram-negative, mostly nonmotile, anaerobic rod-like bacteria. They are normally present in the alimentary and urogenital tracts of mammals. Some species cause infections.
A type of gram-negative, anaerobic, rod-like bacteria. They are generally non-motile and usually found in the alimentary and urogenital tracts of mammals. Often present in the mouth in association with periodontal disease.
A genus of gram-negative, anaerobic, non-spore-forming bacilli that forms most of the intestinal flora and may be found in smaller numbers on the oral, upper respiratory, and genital mucous membranes. Members of the species release an endotoxin that contributes to tissue destruction. They are often found in abscesses or in infections in which gas is found, e.g., on radiographic studies. All species multiply rapidly in necrotic tissue; infections that start in the colon, e.g., may spread to neighboring tissues or the bloodstream producing intra-abdominal abscesses, peritonitis or septicemia.
A classification of oxygen-independent rod-shaped bacteria, known as bacilli, constitutes a genus referred to as bacteroides. These bacteria typically reside in the intestinal tract. Among them, a specific variant called bacteroides fragilis is frequently detected in abdominal wound infections and can be present in the bloodstream during intestinal ailments.