Composition of the bacterial flora in tonsilloliths

Area of Science:

• Oral microbiology
• Microbial ecology

Background:

• Tonsilloliths are calcified structures within the tonsils.
• Oral malodor, commonly known as bad breath, significantly impacts quality of life.
• The microbial etiology of tonsillolith-associated halitosis requires further elucidation.

Purpose of the Study:

• To determine the microbial profiles and composition of tonsilloliths.
• To investigate the bacterial species present on and within tonsilloliths.
• To establish the link between tonsillolith microbiota and oral malodor production.

Main Methods:

• Culture-independent molecular methods (16S ribosomal RNA bacterial gene sequencing).
• Polymerase chain reaction (PCR) amplification and cloning of 16S rDNA.
• Scanning electron microscopy (SEM) for bacterial morphology analysis.

Main Results:

• Identification of anaerobic bacteria, including Eubacterium, Fusobacterium, Megasphaera, Porphyromonas, Prevotella, Selenomonas, and Tannerella genera.
• These identified bacteria are known producers of volatile sulfur compounds (VSCs).
• SEM revealed cocci and rods on the surface, with rods predominant inside tonsilloliths.

Conclusions:

• Tonsilloliths harbor a specific anaerobic microbiota associated with VSC production.
• The microbial composition of tonsilloliths supports their role as a significant source of oral malodor.
• Further research into tonsillolith microbiota could inform halitosis management strategies.