Fig. 2

a Reduction (%) of individual cumulative epg values of experimental lambs after challenge with 1000 × 6 L3 (Groups 1 and 2 versus Group 3) and 2000 × 6 L3 (Group 4 versus Group 5). Group 1 and Group 4 (vaccinated with rHc23 + BI); Group 2 (non vaccinated + BI). Cumulative epg values were estimated by the trapezoidal method to determine areas under the curve (AUC). Horizontal bars represents the mean value from each group. Group 1 (●), Group 2 (■) and Group 4 (▲). b Median values of fecal egg counts from each experimental group along the experiment. Group 1: ^___; Group 2: ^….; Group 3: ^-.-.; Group 4: ---; Group 5: ^___