Charles Patrick Davis, MD, PhD
Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.
- What is Helicobacter pylori?
- What does H. pylori cause in humans?
- What are the symptoms of H. pylori infections?
- Is H. pylori contagious?
- How is H. pylori infection diagnosed?
- Why treat H. pylori?
- What is the treatment for H. pylori?
- Who should receive treatment for H. pylori?
- Can H. pylori infections be prevented?
- What is the prognosis for H. pylori infections?
- Patient Comments: Helicobacter Pylori - Diagnosis
- Patient Comments: Helicobacter Pylori - Treatments
- Find a local Gastroenterologist in your town
What is Helicobacter pylori?
Helicobacter pylori (H. pylori) is a bacterium that causes chronic inflammation of the inner lining of the stomach (gastritis) in humans. This bacterium also is considered as a common cause of ulcers worldwide; as many as 90% of people with ulcers have detectable organisms.
H. pylori infection is most likely acquired by ingesting contaminated food and water, and through person to person contact. In the United States, about 30% of the adult population is infected (50% of infected persons are infected by the age of 60), but the prevalence of infection is decreasing because there is increasing awareness about the infection, and treatment is common. About 50% of the world population is estimated to have detectable H. pylori in their gastrointestinal tract (GI tract, but stomach, mainly).
The infection is more common in crowded living conditions with poor sanitation. In countries with poor sanitation, approximately 90% of the adult population can be infected. Infected individuals usually carry the infection indefinitely (for life) unless they are treated with medications to eradicate the bacterium. One out of every six patients with H. pylori infection may develop ulcers of the duodenum or stomach. H. pylori also is associated with stomach cancer and a rare type of lymphocytic tumor of the stomach called MALT (mucosa-associated lymphoid tissue) lymphoma. In addition, several recent research papers have shown a link between diabetes, infections, elevated hemoglobin A1C levels, and H. pylori.
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