Porphyromonas gingivalis and Treponema denticola Mixed Microbial Infection in a Rat Model of Periodontal Disease. - Verma RK; Rajapakse S; Meka A; Hamrick C; Pola S; Bhattacharyya I; Nair M; Wallet SM; Aukhil I; Kesavalu L (Interdisciplinary Perspectives on Infectious Diseases, 2010)