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. 2022 Oct 26;13:1010465. doi: 10.3389/fmicb.2022.1010465

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Copyright © 2022 Zi, Zhang, Hu, Zhang, Chen, Yuan and Cheng.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Time axis diagram: Events of great significance in the study of Streptococcus and gastric cancer. Pound’s team was the first to grow the Streptococcus genus in the stomach juices of healthy men in 1984. Nord’s team grew Streptococcus in gastric juice from patients with stomach cancer in 1985. Terraada’s team found DNA fragments of Streptococcus anginosus in gastric cancer surgical specimens in 1995. Engstrand’s team first used molecular biology techniques to analyze the microbiota of gastric cancer and found that Streptococcus was the dominant bacterium in 2009. Kim’s team first found that gastric microbes were different from those of patients with chronic gastritis, and the Streptococcus family was increased in gastric cancer in 2014. Wu’s team first studied the gastric microbiota after gastric cancer surgery and found that Streptococcus was still one of the most abundant bacterial genera in 2016. Metagenomic analysis of gastric fluid by Zhang’s team found that Streptococcus was the dominant genus and that its abundance was significantly increased in patients with gastric cancer in 2018.