Furthermore, in a recent study, aminopeptidase demonstrated its antigenic potential during the expression of recombinant proteins of Fasciola hepatica when probed against antibodies from patients with fascioliasis (Mirzadeh et al., 2018) and against anti-aminopeptidase monoclonal antibodies from Taenia pisiformis (Zhang et al., 2018). The gene discussed is CPQ; the disease is fascioliasis.