Transient bacteremia from oral cavity related to oral anaerobic bacteria may occur as a result of dental healthcare procedures but also as a result of daily gestures involving the gums (chewing and oral hygiene). The risk of presenting a transient bacteremia is related to oral cavity bacterial load and to the severity of inflammation in the oral cavity. Although bacteremia is transient, in patients with immunodeficiency or comorbidity, this bacteremia may cause extra-oral infections. The bacteremia rate and the identified bacteria vary from one study to the next, depending on the method used to isolate and identify bacteria. Nevertheless, the risk for bacteremia is determined by the infectious and inflammatory conditions of each patient.