Relation of parasitic infection to blood group in El Minia governorate, Egypt

148 patients attending the outpatient Tropical Medicine clinic, El Minia University Hospital were studied for parasitic infections in relation to ABO blood groups .There was a statistically significant relationship between G. lamblia infection [69.23%] and blood group [A], as well as a tendency of blood group B to be excess among cases of E. coli [46.15%]. On the other hand S. haematobium, S. mansoni, H. nana, E. vermicularis, A. lumbricoides and E. histolytica showed no significant relationship to ABO blood groups