Table 2.

The diagnostic potential of bacteria in different types of cancer.

Strain(s)	Type of cancer	Bacterial action	References
P. melaninogenica Streptococcus mitis Capnocytophaga gingivalis	Oral cancer	Distinct salivary specificity in oral cancer, making them potential salivary markers for early oral cancer detection	Chocolatewala et al. (2010)
Parvimonas micra Clostridium symbiosis Hungatela hathewayi Peptostreptococcus stomatis Gemella morbillorum	Colorectal cancer	Diagnostic model for patients with colorectal cancer	Zhang et al. (2022), Yao et al. (2021), Osman et al. (2021), Rezasoltani et al. (2018)
Prevotella copri Parvimonas micra Parvimonas micra Cetobacterium somerae Gemella morbillorum	Colorectal cancer	Diagnostic model for patients with colorectal cancer	Zhang et al. (2022), Yao et al. (2021), Osman et al. (2021), Rezasoltani et al. (2018)
Enterococcus faecalis Streptococcus bovis Enterotoxigenic Bacteroides fragilis Porphyromonas spp. Fusobacterium nucleatum	Colorectal cancer	Diagnostic model for patients with colorectal cancer	Zhang et al. (2022), Yao et al. (2021), Osman et al. (2021), Rezasoltani et al. (2018)
Peptostreptococcou Peptococcus Porphyromonas Macromonas Rothia Fusobacterium	Gastric cancer	Prediction model for distinguishing gastric cancer patients from healthy people	Xu et al. (2021), Liu et al. (2021)
Oscillospira Escherichia Faecalibacterium Desulfovibrio	Gastric cancer	Potential biomarkers for predicting gastric cancer	Xu et al. (2021), Liu et al. (2021)