Treatment of infectious stomatitis, gingivitis, pharyngitis, bronchitis, tonsillitis, Vincent's angina, pharyngeal diphtheria, periodontitis of wisdom tooth due to fradiomycin and gramicidin-S-susceptible strains of Staphylococci, Streptococci, Propionibacterium acnes, Bacteroides and Fusobacterium spp, and prevention of postoperative (oral surgery) infections.