Specificity of DuCV LAMP assay. (A) Agarose gel electrophoresis of the LAMP products. M, 100 bp DNA ladder. (B) Visualization of the LAMP products. The numbers in (A) and (B) represent DuCV strains and the negative controls used in the specificity test. 1, DuCV GX1006; 2, DuCV GX1008; 3, DuCV GX1104; 4, DuCV GX1105; 5, DuCV GX1209; 6, DuCV GX1208; 7, Muscovy duck parvovirus AV238; 8, Avian influenza virus subtype H5; 9, Avian influenza virus subtype H9; 10, duck plague virus; 11, duck paramyxovirus; 12, Gosling parvovirus; 13, duck hepatitis virus AV2111.