Dynamics of CD3+ T cells and CD21+ B cells duringT. spiralisinfection. Quantitative changes in CD3+ T cells and CD21+ B cells in peripheral blood of pigs inoculated with 100 (A), 1000 (B), and 10 000 (C) muscle larvae of T. spiralis, as analyzed by flow cytometry. The results shown are the means ± SEMs of three independent pigs per group. *P < 0.05 and **P < 0.01, indicate statistically significant differences compared to the control group.