Susceptibility of <i>B. tenagophila</i> collected before and after the introduction of the resistant lineage to infection after exposure to the SJ strain of <i>S. mansoni</i>.

<p>PI: post-introduction.</p><p>*Significant differences between <i>B. tenagophila</i> collected before and after the introduction of the resistant lineage (<i>p</i><0.05). Pearson’s chi-square test which is suitable for comparisons between proportions, and Fisher’s exact test were used at frequencies lower than 5.</p

Silver-stained 6% polyacrylamide gel showing RFLP profiles.

<p>Lane 1: molecular size markers (PhiX 174); Lane 3: negative control (i.e., no template DNA); Lane 13: pool of <i>S. mansoni</i> cercariae; Lane 14: <i>B. tenagophila</i> Taim; Lanes 6 and 9: profile of the local strain of <i>B. tenagophila</i>; Lanes 2, 4–5, 7–8 and 10–12: profiles of <i>B. tenagophila</i> collected 14 months after Taim introduction (i.e., containing the 350 bp marker).</p