FIG. 4.

Effect of NK cell depletion on the course of C. parvum infection in neonatal C57BL/6 mice. Neonatal C57BL/6 animals were infected by oral gavage with C. parvum oocysts and administered either anti-NK1.1 antibodies or control IgG. The infection was followed by microscopic examination of fecal smears from mice at different times of infection and by quantification of oocyst shedding. The values represent the mean numbers of oocysts per 50 fields ± standard errors for 6 to 8 animals per group. Significant differences between mean values for control and antibody-treated mice are marked (*, P = 0.0286; #, P = 0.0476).