Another disease causing bacterium that Wasabi extracts are effective against is Helicobacterium pylori (Masuda et al. 2004, Shin et al. 2004, Haristoy et al. 2005, Sekiguchi et al. 2016) This bacterium is known to be responsible for ulcers and ensuing stomach cancers. Wasabi extracts have been shown to kill the bacterium, even if the bacterium has entered a cell lining the stomach. Under this condition pharmaceutical antibiotics have proven themselves ineffective. Ulcers affect a large percentage of the population.