Serum IgG level against Streptococcus mutans in subjects with caries experience

Area of Science:

• Microbiology
• Immunology
• Dentistry

Background:

• Streptococcus mutans serotype c is a key bacterium implicated in dental caries.
• Understanding the host immune response, specifically serum IgG levels, is crucial for caries prevention strategies.

Purpose of the Study:

• To investigate the relationship between serum IgG levels against Streptococcus mutans serotype c and dental caries prevalence.
• To explore the association of these IgG levels with oral hygiene and age in a cohort of 33 subjects.

Main Methods:

• Serum samples were collected from 33 subjects.
• Micro-ELISA was employed to quantify the activity of serum IgG against sonicated antigens of S. mutans.
• Data on dental caries (including active lesions and DMF index) and oral hygiene were recorded.

Main Results:

• Serum IgG titers against S. mutans were significantly higher in subjects without detectable carious lesions compared to those with active caries (p < 0.05).
• No significant correlation was observed between serum IgG antibody levels to S. mutans and the Decayed, Missing, or Filled (DMF) index.
• A positive association was found between serum IgG antibodies to S. mutans and better oral hygiene levels.

Conclusions:

• Elevated serum IgG levels against Streptococcus mutans serotype c may indicate a protective immune response against dental caries.
• Oral hygiene practices appear to influence the serum IgG antibody response to S. mutans.
• Age was not found to be a significant factor in the serum IgG antibody levels against S. mutans in this study group.