Actinomycotic Osteomyelitis in the Maxilla: A Rare Case Report of Postdengue Complication in Diabetic Patients.

Actinomycotic osteomyelitis in the maxilla is a rare complication, particularly in diabetic patients following dengue infection. Actinomycosis, caused by Actinomyces israelii, typically arises in immunocompromised hosts, with dengue-induced immune dysregulation and diabetes contributing to its pathogenesis. This case report describes a 42-year-old diabetic male presenting with oroantral communication, loose posterior maxillary teeth, and persistent pus discharge 20 days postdengue. Imaging revealed bone erosion, and histopathology confirmed actinomycosis. The patient underwent partial maxillectomy with antibiotic therapy, leading to full recovery within 6 months. This case emphasizes the importance of early diagnosis and tailored treatment in managing rare bacterial infections in vulnerable populations.