In the article “Association of periodontal disease, oral procedures, and other clinical findings with bacterial endocarditis in dogs” (JAVMA 2009;234:100-107), values in Table 2 for number of control dogs with evidence of immunosuppression and number of control dogs with neoplasia were inadvertently switched. There were 11 (14%) control dogs with evidence of immunosuppression, and 10 (13%) control dogs with neoplasia.