Taylor & Francis. ISBN 9997625897. Baker, Edward L. (May 2008). "Chronic toxic encephalopathy caused by occupational solvent exposure". Annals of Neurology. 63 (5): 545–547. doi:10.1002/ana.21394. PMID 18409195. S2CID 41546628. Feldman, R G; Ratner, M H; Ptak, T (May 1999). "Chronic toxic encephalopathy in a painter exposed to mixed solvents". Environmental Health Perspectives. 107 (5): 417–422. doi:10.1289/ehp.99107417. PMC 1566426. PMID 10210698. Encephalopathy Associated with Psychotropic Drug Therapy Yuji Odagaki Department of Psychiatry, Faculty of Medicine, Saitama Medical University Department of Psychiatry, Moro Hospital Japan

External links
NINDS Encephalopathy Information Page
Encephalopathy Causes, Symptoms, Diagnosis and Treatment by MedicineNet
Necrotizing periodontal diseases is one of the seven categories of periodontitis as defined by the American Academy of Periodontology 1999 classification system and is one of the three classifications of periodontal diseases and conditions within the 2017 classification. Necrotizing periodontal diseases are a type of inflammatory periodontal (gum) disease caused by bacteria (notably fusobacteria and spirochaete species). The diseases appear to represent different severities or stages of the same disease process, although this is not completely certain. These diseases usually have a sudden onset, and so the term acute is often added to the diagnosis. The mildest on the spectrum is necrotizing ulcerative gingivitis (NUG), followed by the successively more severe conditions necrotizing ulcerative periodontitis (NUP), necrotizing stomatitis and finally cancrum oris (noma), which is frequently fatal. Necrotizing ulcerative gingivitis
Necrotizing ulcerative gingivitis, (NUG), or simply necrotizing gingivitis (NG), is a common, non-contagious infection of the gums. Acute necrotizing ulcerative gingivitis (ANUG) is the acute presentation of NUG, which is the usual course the disease takes. If improperly treated NUG may become chronic and/or recurrent. In developed countries, ANUG occurs mostly in young adults with predisposing factors such as psychological stress, sleep deprivation, poor oral hygiene, smoking, immunosuppression and/or malnutrition. In developing countries, ANUG occurs mostly in malnourished children. Due to shared predisposing factors in a population (e.g. students during a period of examinations, armed forces recruits) ANUG is known to occur in epidemic-type patterns. This has led to the popular belief that ANUG is contagious, but this is not the case.