As a check on the identity of schistosome cercariae recovered, we amplified the nad5 gene from cercariae from 20 different positive snails, five from each of the time points, and representing several beach sites where schistosome cercariae were found.27 All 20 samples were verified as S. mansoni based on nad5 band size, with one sample (Maguti Beach) exhibiting a double infection with both S. mansoni and S. rodhaini. The gene discussed is MT-ND5; the disease is infection.