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Research currently indicates that various bacterial species are implicated in multiple cancer types, including esophageal cancer, breast cancer, head and neck cancer, prostate cancer, and pancreatic cancer.
Bacteria can contribute to the development of cancer by altering host cell signaling pathways, producing metabolites, or inducing inflammation.
Bacterial toxins have been proven effective candidates in killing cells in vitro and in vivo and have attracted special attention to C. perfringens enterotoxin (CPE)
Salmonella spp. and Clostridium spp. have inhibitory effects on tumor growth
In 1983, Marshall and Warren found evidence linking bacteria to cancer. They isolated Helicobacter pylori from biopsy samples. These samples were from the antral mucosa. They observed this bacterium in many patients with active chronic gastritis, duodenal ulcers, or gastric ulcers. Their findings proved the bacterium's role in these diseases and gastric cancer.
see also:
Pathogenic Bacteria