Gut bacteria determine speed of tumor growth in pancreatic cancer. The population of bacteria in the pancreas increases more than a thousand fold in patients with pancreatic cancer, and becomes dominated by species that prevent the immune system from attacking tumor cells.

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Gut bacteria determine speed of tumor growth in pancreatic cancer. The population of bacteria in the pancreas increases more than a thousand fold in patients with pancreatic cancer, and becomes dominated by species that prevent the immune system from attacking tumor cells.