Caries May Signal Oral Antibiotic Resistance
Study found species-specific differences in biofilm -forming capacity and antimicrobial susceptibility among supragingival bacterial isolates from patients with active dental caries.
By
Andrea Surnit
May 29, 2026
Clinical Scorecard: Caries May Signal Oral Antibiotic Resistance
At a Glance
Category Detail
Condition Dental Caries Key Mechanisms Differences in antibiotic resistance and biofilm formation among supragingival bacteria. Target Population Adults with active dental caries and healthy controls. Care Setting Dental clinics and research institutions.
Key Highlights
21% of Veillonella parvula isolates from caries patients were susceptible to ampicillin compared to 73% from healthy patients. 79% of isolates from caries patients were moderate biofilm producers, while 82% from healthy patients were non-biofilm producers. Resistant bacteria were more frequently associated with stronger biofilm formation in healthy patients. Beta-lactamase activity was confirmed in eight bacterial isolates, predominantly in Fusobacterium nucleatum. Guideline-Based Recommendations
Diagnosis
Assess supragingival plaque for bacterial isolates in patients with dental caries. Management
Consider species-specific antibiotic susceptibility when treating dental infections. Monitoring & Follow-up
Monitor biofilm formation and antibiotic resistance patterns in patients with dental caries. Risks
Potential for intra-subject dependency due to multiple isolates from the same patient. Patient & Prescribing Data
Adults with active dental caries and healthy controls.
Antibiotic resistance and biofilm formation vary significantly among different bacterial species.
Clinical Best Practices
Utilize disk diffusion and Etest methods for antimicrobial susceptibility testing. Quantify biofilm formation using crystal violet staining. Related Resources & Content
