Returning from vacation, he noted the presence of bacteria in the culture of an unknown species. He had casually isolated Helicobacter pylori, one of the most important discoveries in medicine in the last 25 years. Australian scientists Warren and Marshall received the Nobel Prize for medicine in 2005, by their findings. In addition, scientists have concluded that the bacteria that causes most stomach ulcers has been in people’s digestive system since modern humans began to leave Africa more than 60,000 years ago. The Helicobacter pylori, which infects the mucous coating of the stomach and duodenum, is the only known organism that is known thrives in the highly acidic environment of the stomach, says the medical bacteriologist Jacinto Medina. The finding, published in the journal Nature, can give some ideas to the medicine, because it improves the understanding of ulcers, according to one of its authors Dr.
Francois Balloux, of the University of Cambridge in the United Kingdom. The gastroenterologist Jose Maria Pajares, great promoter of research on Helicobacter pylori in Europe since 1984, recalled that he has spent many years trying to convince his colleagues that Helicobacter was not a myth but a reality. Gastric cancer and Lymphoma of MALT (mucosa associated lymphoid tissue Lymphoma), have been linked to Helicobacter pylori, by which this bacterium has been classified in Group I carcinogen by the International Agency for research of Cancer. While the Association of these diseases with Helicobacter pylori is supported by reasonable suspicion, it is not completely clear that there is a casual relationship involved. Until the 1990s, it was believed that ulcer was a chronic ailment, and they were stress and very spicy foods causing peptic ulcer and the gastritis, said Medina. Now these disorders are treated with different combinations of antibiotics that act against bacteria.