Fig. 6.

Comparison of infection status for B. sudanica and B. pfeifferi at various times post-exposure. B. sudanica indicated by B.s. and solid bars; B. pfeifferi indicated by B. p. and bars with diagonal stripes. Green = PCR positive snails at 1–4 dpe; blue = PCR positive, dissection positive snails; yellow = PCR positive, dissection negative snails; pink = snails shedding S. mansoni at 40 dpe. 1–4 dpe, no significant difference in S. mansoni infection rates (p = 0.052) between B. pfeifferi and B. sudanica; 8–24 dpe, significant different in successful parasite infection rates (those that are both dissection and PCR positive) between B. pfeifferi and B. sudanica (p = 0.008); at 40 dpe, significant difference in S. mansoni infection rates (including those both dissection and PCR positive, and those shedding) between two species (p < 0.001), including with more B. pfeifferi shedding cercariae than for B. sudanica