“… 10 , 11 In biofilms such as dental plaques, this gram-positive, encapsulated, nonmotile, bacterium forms multispecies microcolonies or, in the case of high-biomass regions, small islands 12 and shows resilience even after multiple endodontic treatments. 13 Although R. mucilaginosa is typically nonpathogenic in healthy individuals, it can act as an opportunistic pathogen and lead to conditions such as pneumonia, 14 bacteremia, 15 and endocarditis, 16 and cause the buildup of biofilms on prosthetics, 17 among others. 18 …”