The human oral cavity is a niche for abundant and distinct microbial communities, and the second most microbial-complex anatomic site after the gut system. 1 The oral microbiome has been linked to a variety of oral diseases that affect over 3-5 billion people globally. 2 Surveillance for oral diseases has increased with the growing burden of non-communicable diseases (eg diabetes and cancer). 3 In the current human immunodeficiency virus (HIV) epidemic, 30%-80% of HIV-positive individuals still develop oral manifestations, despite the