Member of the <i>Enterobacteriaceae</i>, a group of facultative gramnegative bacteria, classified as a Class 2 microorganism. This class contains microorganisms that could potentially cause disease in humans, however no known pathogenicity exists for the subspecies <i>ozaenae</i>. <i>Klebsiella</i> bacteria are widely distributed in nature, occurring naturally in the soil, water and in grain and are normal inhabitants of the intestinal tract