1. Introduction -- 2. Discovery of the Organisms -- 2.1. Life of Alexandre Yersin (1863โ{128}{147}1943) -- 2.2. Nomenclature -- 2.3. History of Yersinia enterocolitica and Yersinia pseudotuberculosis -- 2.4. The Life and Work of K. F. Meyer (1884โ{128}{147}1974) -- References -- 3. Epidemiology -- 3.1. Plague -- 3.2. Yersinia enterocolitica Infection -- 3.3. Yersinia pseudotuberculosis Infection -- References -- 4. Clinical Syndromes and Pathology in Humans -- 4.1. Plague -- 4.2. Yersinia enterocolitica Infection -- 4.3. Yersinia pseudotuberculosis Infection -- References -- 5. Pathogenesis and Toxins -- 5.1. Plague -- 5.2. Yersinia enterocolitica Infection -- 5.3. Yersinia pseudotuberculosis Infection -- References -- 6. Diagnosis and Treatment -- 6.1. The Diagnosis of Plague -- 6.2. Diagnosis of Yersinia enterocolitica and Yersinia pseudotuberculosis Infections -- 6.3. Treatment of Plague -- 6.4. Treatment of Yersinia Infections -- References -- 7. Prevention and Control -- 7.1. Control of Plague -- 7.2. Control of Other Yersinia Infections -- References