Burrill Bernard Crohn at Mount Sinai Hospital in 1907. He was promoted to head of gastroenterology in 1920, the same year he joined the staff of Columbia University. Working with colleagues at Mount Sinai Hospital, Crohn identified fourteen patients whose symptoms and intestinal abnormalities discovered at surgery, while consistent with each other, did not fit any previously identified disease. Crohn, along with Leon Ginzburg and Gordon Oppenheimer, prepared the classic paper describing this new condition. This paper was read at a professional meeting in May 1932 and published in the "Journal of the American Medical Association" in October 1932. The title of the
Periodontal disease been tested in mice and is now planning for human trials in 2018. Periodontal disease is the most common disease found in dogs and affects more than 80% of dogs aged three years or older. Its prevalence in dogs increases with age, but decreases with increasing body weight; i.e., toy and miniature breeds are more severely affected. Recent research undertaken at the Waltham Centre for Pet Nutrition has established that the bacteria associated with gum disease in dogs are not the same as in humans. Systemic disease may develop because the gums are very vascular (have a good blood supply).