Abstract
A total of 23 516 stool specimens collected from patients attending three medical centres in Riyadh, Saudi Arabia, were examined for intestinal parasites. Of these 5737 (24·4%) were positive.
Entamoeba histolytica (8·8%) and Giardia lamblia (6·3%) were the commonest parasites found, and in the age group of one to 15 years. Giardia was found in 14·8% of males and 11·9% of females. Other intestinal parasites present included Ascaris lumbricoides, Trichuris trichiura, Schistosoma mansoni, Hymeolepis nana. Ancylostoma duodenale, Enterobius vermicularis. Taenia saginata and Schistosoma hematotium.