Immunity to Infection Periodontitis-associated Pathogens P. Gingivalis and A. Actinomycetemcomitans Activate Human Cd14 + Monocytes Leading to Enhanced Th17/il-17 Responses Aa Stimulation of Monocytes Resulted in Increased Cd40, Cd54 and Hla-dr Expression, and Enhanced Tnf-α, Il-1β, Il-6 and Il-23 P