Occurrence of yeasts, enterococci and other enteric bacteria in subgingival biofilm of HIV-positive patients with chronic gingivitis and necrotizing periodontitis - Gaetti-Jardim Júnior, Elerson; Nakano, Viviane; Wahasugui, Thais Cristiane; Cabral, Fátima C.; Gamba, Rosa; Avila-Campos, Mario Julio (Brazilian Journal of Microbiology, 2008)