Helicobacter pylori or Helicobacter pylori, English name is Helicobacterpylori, referred to as Hp. Gram-negative, micro-aerobic bacteria that live in the stomach and duodenum in various regions. It causes mild, chronic inflammation of the gastric mucosa and can even lead to gastric and duodenal ulcers and gastric cancer. Helicobacter pylori is a micro-aerobic bacteria, environmental oxygen requirements of 5 to 8%, in the atmosphere or anaerobic environment can not grow.Helicobacter pylori is a spiral, slightly anaerobic, demanding growth conditions for bacteria. The first successful isolation from gastric mucosal biopsies of patients with chronic active gastritis in 1983 was the only type of microorganism known to survive in the human stomach.