Actinomycosis is a rare but serious bacterial infection caused by Actinomyces bacteria. It mainly affects the mouth, throat, lungs, and abdomen. To prevent actinomycosis, it is important to practice good oral hygiene, including brushing teeth twice per day, flossing, and rinsing with an antiseptic mouthwash. It is also important to maintain a healthy diet and avoid smoking. Additionally, if you are having dental work done, be sure to tell your dentist about any pre-existing medical conditions, such as diabetes or HIV, that could put you at higher risk for actinomycosis. Other preventive measures may include taking antibiotics regularly if prescribed by your doctor and getting regular dental check-ups.