Fig. 3.

Infection status of laboratory-reared B. sudanica exposed individually to 1 m/s of S. mansoni. The number over each bar indicates the number of snails examined in the PCR assay. The number within the bar is the number of positive snails. The percentage of snails found positive in the PCR assay is indicated on the vertical axis. At 8 dpe and after, snails were also dissected prior to examination in the assay. The number of snails found to be PCR positive and dissection positive (light green) and PCR positive but dissection negative (dark green, indicative of missed or failed infections) is shown for each time point. At day 40, only non-shedding snails were examined in the assay