Actinomyces is a genus of bacteria, so the antibiotics that would be used to treat an infection caused by this bacteria would depend on the specific strain causing the infection. Common antibiotics used to treat Actinomyces infections include penicillin, tetracycline, clindamycin, and erythromycin. If the infection is severe, a doctor may also prescribe an antifungal medication. In some cases, a combination of antibiotics may be used to treat an infection caused by Actinomyces. It is important to note that some strains of Actinomyces are resistant to certain antibiotics, so it is important to consult a doctor before taking any antibiotics.