Which bacteria is the most commonly found in odontogenic infections?

In odontogenic infections, the most common bacteria are indeed part of the Streptococcus viridans group. This group includes alpha-hemolytic streptococci, which are normal flora in the oral cavity. They often play a significant role in dental caries and periodontal disease, and can be implicated in various odontogenic infections such as periapical abscesses and periodontal abscesses.

Streptococcus viridans is particularly adept at thriving in anaerobic environments, making it well-suited for infections originating from dental issues where anaerobic conditions often prevail. In these infections, Streptococcus viridans can be involved in polymicrobial flora, but it remains predominant due to its prevalence in the oral microbiome.

The other types of bacteria listed are less commonly associated with odontogenic infections. For example, Escherichia coli is more commonly linked to gastrointestinal infections, while Staphylococcus aureus is usually found in skin and soft tissue infections. Clostridium perfringens can cause gas gangrene and is not typically found in oral infections.