“…Light microscopic screening revealed the presence of Blastocystis in 54.17% of the examined stool samples which have been collected from Alexandria, Egypt. Prevalence of 67.4% and 52% were previously reported in Alexandria in 2016 and 2019, respectively ( Eassa et al, 2016 , Elsayad et al, 2019 ), while in other Egyptian governorates prevalence ranged from 10% up to 53% ( El-Shewy et al, 2002 ; El-Marhoumy et al, 2015 , Farghaly et al, 2017 ). Epidemiological studies in several countries with different sanitation standards, revealed a wide range of Blastocystis prevalence ranging from 0.54% up to 63% ( Beyhan et al, 2015 , Duda et al, 2015 , El Safadi et al, 2016 , Osman et al, 2016 , Ramírez et al, 2016 , Seyer et al, 2017 , Asfaram et al, 2019 , Delshad et al, 2020 , Zanetti et al, 2020 )…”