<unk>  is a gram-negative, obligately anaerobic, catalase-positive, bile-resistant, and asaccharolytic bacillus. This bacterium is about 0.7 μm wide by 1.0–10.0 μm long in colony and the cells are pleomorphic with irregular cell walls. This bacterial species is mostly urease positive; around 75% of the strains are urease positive. Less than 0.01% of the human gut microbiota is this bacterium.<unk>  is linked to various diseases and is not well known due to frequent misidentification of the bacteria. The two unique characteristics of<unk>  are the utilisation of the sulfated amino acid taurine in the production of hydrogen sulfide and the rapid catalase reaction. This bacterium is vulnerable to the antibiotics: imipenem, ceoxitin, and ticarcillin, which are all β-lactam antibiotics.
Bilophila wadsworthia
Mycoplasma pirum
Capillaria aerophila
Mycobacterium canetti
Mycobacterium orygis
Mycoplasma incognitus
Mycoplasma orale
Bartonella rochalimae