Oral Ulceration - INFECTION
Infectious causes of chronic oral ulceration are rare. Viral infection will seldom lead to development of a chronic oral ulcer in an immunocompetent patient. Although secondary, nonspecific bacterial infection of chronic oral ulcer is common, specific bacterial infection is not. An example of a chronic ulcerative disease caused by specific bacterial infection would include a gumma in tertiary syphilis, a tuberculous ulcer, or actinomycosis.Deep mycotic infections, such as histoplasmosis or blastomycosis, will typically cause chronic, deep-based ulcers that may be granulomatous and friable in appearance.
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