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Updated: May 7, 2026
09:44
Oral Biofilm Analysis of Palatal Expanders by Fluorescence In-Situ Hybridization and Confocal Laser Scanning Microscopy
Published on: October 20, 2011
Exploring bacterial flora in oral squamous cell carcinoma: a microbiological study
Summary
Oral squamous cell carcinoma (OSCC) is linked to significant shifts in oral microflora. Bacterial counts were notably higher in both cancerous tissues and saliva of OSCC patients compared to healthy individuals.
Area of Science:
- Microbiology
- Oncology
- Oral Health
Background:
- The oral cavity harbors a diverse microbial community, with most bacteria existing in a commensal state.
- Alterations in oral microbial dynamics are implicated in oral pathologies and can affect distant sites.
- Oral squamous cell carcinoma (OSCC) is a significant global health concern, and its relationship with the oral microbiome is an area of active research.
Purpose of the Study:
- To investigate and compare the microbial flora in patients with oral squamous cell carcinoma (OSCC) versus healthy controls.
- To quantify bacterial load at the carcinoma site, adjacent healthy mucosa, and in saliva.
- To determine if bacterial counts differ significantly between OSCC patients and healthy individuals.
Main Methods:
- Collection of oral swabs and saliva samples from OSCC patients (carcinoma site, contralateral healthy mucosa, saliva) and healthy controls (healthy mucosa, saliva).
- Microbial analysis using standard culture techniques to determine colony forming units (CFU)/ml.
- Samples were immediately transported on ice to the laboratory for processing.
Main Results:
- A significantly higher median number of colony forming units (CFU)/ml was observed at carcinoma sites compared to contralateral healthy mucosa in OSCC patients.
- Saliva samples from OSCC patients exhibited a significantly greater median CFU/ml compared to saliva samples from healthy control subjects.
- These findings indicate an increased bacterial load associated with oral squamous cell carcinoma.
Conclusions:
- The oral microbiome composition and load are significantly altered in the presence of oral squamous cell carcinoma.
- Elevated bacterial counts in both tumor-adjacent tissues and saliva suggest a potential role of microbial dysbiosis in OSCC development or progression.
- Further research into the specific microbial species and their functions is warranted to understand their contribution to oral cancer.
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