Intestinal parasitic infections such as Giardia lamblia, Entamoeba histolyica and Enterobius Vermicularis are among the most common infections worldwide.So parasitic infections are considered one of the major health problems in the world especially in developing countries.

Helicobacter pylori is a gram-negative,helical-shaped,motile bacillus bacterium,which colonizes the gastric mucosa.

H.pylori bacterium secretes urease,a special enzyme that converts urea to ammonia.

Ammonia reduces the stomach's acidity .This risk factor allows pathogenic intestinal protozoa such as G.lamblia to take the opportunity to cross through the stomach's increased pH and cause disease.

Inclusion Criteria:

• patients complaining of dyspepsia , abdominal burning pain,diarrhea,dysentery,of persons of any age or sex group.

Exclusion Criteria:

• patients taking antibiotics within the previous four weeks, proton pump inhibitors within the previous two weeks, or anti-parasitic drugs within the previous two weeks.

Samples will be collected from outpatients complaining of dyspepsia, abdominal burning pain, diarrhea,and dysentery with persons of any age or sex groups from different locations (cities and villages)