Acne VulgarisClindamycinPropionibacterium acnesAnti-Bacterial AgentsErythromycinLincomycinMicrobial Sensitivity TestsBacteria, AnaerobicBacteroides fragilisDermatologic AgentsDrug Resistance, BacterialAcne KeloidMacrolidesBacteroides InfectionsSebumMetronidazolePropionibacteriumBenzoyl PeroxideDrug Resistance, MicrobialLincosamidesGram-Positive Bacterial InfectionsStreptococcal InfectionsTetracyclineIsotretinoinCefoxitinStaphylococcus aureusKeratolytic AgentsStaphylococcal InfectionsKetolidesStaphylococcusSebaceous GlandsBacteroides