Objective: To investigate the impact of probiotics on the levels of serum cytokine IL-4、IL-10、IL-12 and IL-17 after Blastocystis hominis infection in rats,and to explore the interaction among probiotics,B. hominis infection,and intestinal dysbiosis. Methods: Fourty-eight SD rats were randomly assigned to 8 groups according to factorial design with three factors( probiotics,B. hominis infection,and intestinal dysbiosis) and two levels( 0 and 1). The rats in infection groups orally received 103/ day B. homini...