FIG. 2.

Oral STEC treatment prevents SLP increase in cultured PBMC. Four groups of sheep received biweekly oral doses of bacteria, and three groups were challenged with BLV. Group 1 received STEC, E. coli O157:H7 strain 905, group 2 received an isogenic stx₂ deletion mutant of 905, and groups 3 and 4 received stx-negative E. coli K-12. Solid circles show mean values from four replicate cultures for individual animals, and cross bars show median values for groups. The broken line indicates the median value for the healthy control group.