Necrotizing ulcerative gingivitis (NUG, Vincent's angina) is an uncommon but serious form of gingivitis.


Synonym: trench mouth (from World War I)


Risk factors:

(1) poor oral hygiene

(2) smoking

(3) general debilitation

(4) advanced HIV disease


Clinical findings:

(1) necrotizing infection of the gingivitis with erythema and sloughing of mucosa

(2) severe halitosis

(3) oral pain (hence the angina)

(4) bleeding gums

(5) fever

(6) regional lymphadenopathy in the neck

(7) general malaise

(8) anorexia



(1) A variety of anaerobic bacteria, often with Spirochaeta denticola (Vincent's organism).


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