Abstract
The zoonotic intestinal protozoan parasites and Helicobacter pylori) are worldwide distributedhuman pathogens. This study evaluated the co-infection between H. pylori and the commonestintestinal protozoan parasites. A total of 240 stool samples were collected over one yearfrom patients attending outpatients' clinics of Kafrelsheikh University Hospitals, after verbalconsent for participation. Samples were subjected to microscopic examination directly beforeand after formol ether concentration. Samples were examined using merthiolate iodine formalin(MIF) direct smears to detect G. intestinelis and permanent modified trichrome and modifiedacid-fast cold kinyoun's stained smears to detect E. histolytica/dispar and Cryptosporidium spp.respectively. Screening with immune-chromatographic test (ICT) detected H. pylori infection.The results showed that H. pylori were in 160/240 (66.7%). Univariate analysis showed significanceassociation between H. pylori and protozoan causing diarrhea (P = 0.015). These protozoanparasites were with G. intestinalis ((P=0.002), E. histolytica/dispar (P= 0.041), Cryptosporidiumparvum (P =0.018) and Blastocystis hominis (P= 0.040).
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