Which bacteria is known to produce oral facial abscesses with sulfur granules and is associated with canaliculitis?

• A. Moraxella
• B. Mycobacteria
• C. Proteus mirabilis
• D. Actinomyces

Answer: (D)

Sulfur granules in chronic oral facial abscesses point to an actinomycosis infection, classically due to Actinomyces israelii. This organism is an anaerobic, filamentous gram-positive bacterium that resides in the mouth and can invade tissue after mucosal disruption, leading to persistent draining sinuses and the characteristic sulfur granules—dense, granule-like collections of bacteria in a proteinaceous matrix. Actinomyces is also a known cause of canaliculitis, where discharge from the tear ducts can contain these sulfur granules. Other organisms listed do not typically produce sulfur granules in oral-facial abscesses and are not classically linked to canaliculitis in this context.