Development and validation of a lateral flow immunoassay using colloidal gold for the identification of serotype-specific foot-and-mouth disease virus O, A and Asia 1.
A lateral flow immunoassay (LFI) was developed to identify and diagnose foot-and-mouth disease virus (FMDV) serotypes O, A and Asia 1. Antibodies obtained from rabbits and guinea pigs immunized with cell-culture-adapted virus strains (O/CHA/99, A/GS/LX/66, Asia 1/CHN/05) and suckling-mouse adapted virus strains (O/AV99(L), A/AV88(L), Asia 1/YNBS/58) were used as capture antibodies. The diagnostic kit included three immunochromatographic strips of types O, A and Asia 1, and the type-specific results were confirmed by color on the test lines of the three strips. The LFI was evaluated using epithelial and vesicular samples (n=396) prepared from current and historical field samples (provide by the National Foot-and-Mouth Disease Reference Laboratory of China at Lanzhou Veterinary Research Institute). Negative samples (n=95) were collected from healthy animals. The diagnostic sensitivity of the LFI for FMDV serotypes O, A and Asia 1 was 88.3% compared to 89.7% obtained by the reference method of indirect-sandwich ELISA. The sensitivity of the LFI for FMDV type Asia 1 was higher at 92.1% compared to 90.5% for the ELISA. The specificity of the LFI was 97.1% compared with 97.4%.
Key Laboratory of Animal Virology of Ministry of Agriculture, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China.
Tao
T
Jiang
Zhong
Z
Liang
Weiwei
W
Ren
Juan
J
Chen
Xiaoying
X
Zhi
Guangyu
G
Qi
Yamin
Y
Yang
Zaixing
Z
Liu
Xiangtao
X
Liu
Xuepeng
X
Cai
D000818:Animals; D000914:Antibodies, Viral; D002681:China; D029544:Foot-and-Mouth Disease Virus / Q000145:classification* / Q000276:immunology / Q000302:isolation & purification*; D017979:Gold Colloid; D006168:Guinea Pigs; D007118:Immunoassay / Q000379:methods; D051379:Mice; D011817:Rabbits; D011933:Reagent Kits, Diagnostic; D012680:Sensitivity and Specificity; D014773:Virology / Q000379:methods*
D000914:Antibodies, Viral; D017979:Gold Colloid; D011933:Reagent Kits, Diagnostic