(A) Detection limit of PCR F3-B3. Lane Amp, DNA of Amphimerus sp. (10 ng); lanes 10−1–10−9, 10-fold serial dilutions of Amphimerus sp. DNA. (B) Specificity PCR F3-B3. Lanes Amp, Cs, Ovi, Sm, Sh, Sj, Si, Fh, Dd, Ov, Sv, Ts, Tt, Eg, Cp, Gd, Eh: DNA samples of Amphimerus sp., Clonorchis sinensis, Opisthorchis viverrini, Schistosoma mansoni, S. haematobium, S. japonicum, S. intercalatum, Fasciola hepatica, Dicrocoelium dendriticum, Onchocerca volvulus, Strongyloides venezuelensis, Trichinella spiralis, Taenia truncata, Echinococcus granulosus, Cryptosporidium parvum, Giardia duodenalis and Entamoeba histolytica, respectively. In all panels: lane M, molecular weight marker (100 bp Plus Blue DNA Ladder) and lane N, negative controls (ultrapure water, no DNA template).