AAID Associate Fellow Exam 2025 – 400 Free Practice Questions to Pass the Exam

Streptococcus sanguis is a bacterium that plays a significant role in oral health. It is part of the normal flora present in the mouth and is involved in the formation of dental plaque. This bacterium is often implicated in the initial colonization and adhesion to tooth surfaces, where it can contribute to both healthy biofilm development and the potential progression towards oral diseases if an imbalance occurs.

In a healthy oral environment, Streptococcus sanguis helps maintain a balanced microbial community. It is primarily known for its beneficial role because it can produce substances that inhibit the growth of more pathogenic bacteria. This balance is crucial for oral health, as it minimizes the risk of plaque buildup and subsequent conditions such as gingivitis and periodontitis.

In contrast, other options provided do not have the same association with oral health. For example, Staphylococcus aureus is more commonly found in skin infections and other systemic infections rather than in the oral cavity. Escherichia coli is primarily associated with the intestine and is not typically a member of the oral microbiome. Candida albicans is a yeast that can be present in the mouth, particularly in cases of oral thrush, but it is not a bacterium and is often associated with opportunistic fungal infections