CP and ancylostomiasis: Using this hamster model, we previously demonstrated that a single, oral 100 mg/kg dose of the cathepsin cysteine protease (CP) inhibitor, N-methyl-piperazine-phenylalanyl-homophenylalanyl-vinylsulfone-phenyl (K11777; Figure 1) [37], provided near-cure of hookworm infection [36].