Helicobacter pylori is a gram-negative bacterium colonizes the gastric mucosa. Chronic infec
tions can develop various gastrointestinal complaints as gastritis, gastric and/or duodenal ulcers, 
cancers, or mucosa-associated lymphomas. Also, gastrointestinal diseases are caused by bacte
ria, viruses, and parasites. This study evaluated the intestinal parasites among positive and nega
tive H. pylori infected outpatients. Stool samples (200) collected from individuals who attended 
outpatient clinics in Sohag University Hospitals were examined for H. pylori antigen and gastro
intestinal parasites. They were divided into two groups of 100 each, G1: H. pylori positive anti
gen cases and G2:  H. pylori negative ones as control. The results showed significant increase in 
G1 than in G2 as to G. lamblia, C. parvum, E. histolytica, B. hominis, E. coli, I. buetschilii, Cy
clospora spp., E. vermicularis, H. nana and A. lumbricoides.