Relationship between oral motor dysfunction and oral bacteria in bedridden elderly

Area of Science:

• Geriatric Medicine
• Oral Microbiology
• Infectious Diseases

Background:

• Oral motor dysfunction, encompassing swallowing and speech impairments, is a concern in elderly individuals, particularly those with prolonged hospital stays.
• The oral cavity harbors diverse bacterial species, and compromised oral motor function may alter the oral environment, potentially increasing susceptibility to colonization.

Purpose of the Study:

• To investigate the association between oral bacterial colonization and the presence of oral motor dysfunction in elderly patients.
• To identify specific bacterial species that are more prevalent in elderly patients with swallowing or speech disorders.

Main Methods:

• A study was conducted on 55 elderly individuals hospitalized for over 3 months.
• Oral motor function (swallowing and speech) was assessed.
• Bacterial species in dental plaque were identified and statistically analyzed in relation to oral motor dysfunction and hypoalbuminemia.

Main Results:

• Significantly higher detection rates of methicillin-resistant Staphylococcus aureus (MRSA), Pseudomonas aeruginosa, Streptococcus agalactiae, and Stenotrophomonas maltophilia were observed in patients with swallowing disorders compared to those without.
• A similar trend was noted for patients with speech disorders.
• Approximately half of the patients exhibiting oral motor dysfunction and hypoalbuminemia were colonized by MRSA and/or Pseudomonas aeruginosa.

Conclusions:

• Oral motor dysfunction, especially when combined with hypoalbuminemia, significantly increases the risk of opportunistic oral microorganism colonization in elderly patients with long-term hospitalization.
• These findings highlight the importance of monitoring oral health in vulnerable elderly populations to mitigate risks associated with opportunistic pathogens.