HMM. Bacterial Infection Boosts Insulin-Resistant Diabetes Risk? “Helicobacter pylori (H. pylori) bacteria causes stomach ulcers and also may increase the risks of some types of cancers while possibly lowering the risks of other cancers. It isn’t clear (at least to me) whether killing the H. pylori that might be in your stomach will lower or raise all cause mortality risk. However, a new study finds evidence that H. pylori could contribute to development of insulin-resistant (type 2) diabetes.”