Electron micrograph of H.<unk>  thumb This is a timeline of the events relating to the discovery that<unk><unk><unk>  and some cancers are caused by H.<unk> . In 2005, Barry Marshall and Robin Warren were awarded the Nobel Prize in Physiology or Medicine for their discovery that<unk><unk><unk>  (PUD) was primarily caused by<unk><unk> , a bacterium with affinity for acidic environments, such as the stomach. As a result, PUD that is associated with H.<unk>  is currently treated with antibiotics used to eradicate the infection. For decades prior to their discovery, it was widely believed that PUD was caused by excess acid in the stomach. During this time, acid control was the primary method of treatment for PUD, to only partial success. Among other effects, it is now known that acid suppression alters the stomach milieu to make it less amenable to H.<unk>  infection.
Timeline of peptic ulcer disease and Helicobacter pylori
Epidemiology of binge drinking
Recurrent genital herpes quality of life measure
Timeline of sexual orientation and medicine
Timeline of HIV/AIDS
Simple clinical colitis activity index
Alcohol and weight
Smoking in South Korea