AGRI 224 Lecture Notes - Lecture 6: Helicobacter Pylori, Human Migration, Gastritis

• School: University of Delaware
• Department: Agriculture
• Course: AGRI 224
• Professor: Aresenault

Document Summary

Since the species began, human migration has led to the spread of pathogens. Humans also acquired new infections as the entered new areas. Phylogeographic analysis of viruses and bacteria can help up trace the spread of humanity across the globe. Was murdered in the tyrolean alps about 5,300 years ago. Discovered by hikers in 1991 - was frozen in the ice. Lucky for us, he died with a full stomach. Helicobacter pylori in tzi: pylori may be the most successful bacterium to infect humans, after the bacterial precursor to mitochondria. Infects nearly half of all people on earth. Causes gastric ulcers, cancer and gastritis in about 10% of people. May be protective against asthma, allergies and acid reflux in others. Has likely inhabited human guts for 100,000 years. The different h. pylori can allow us to trace human migration. In europe, most common h. pylori (hpeurope) shares dna elements with types from asia and africa.