Results of the EQA study for laboratories performing ELISA for the serological detection of West Nile virus.

WNV: West Nile virus; DENV: dengue virus; JEV; Japanese encephalitis virus; TBEV: tick-borne encephalitis virus; USUV: Usutu virus; Neg: negative control; Sc: Score; IgM: Immunoglobulin M; IgG: Immunoglobulin G; nd: not done;
*: reactivity also with heterologous flaviviruses;
S: commercial ELISA InBios;
H: ELISA in-house test;
E: commercial ELISA Euroimmun;
Fcommercial ELISA Focus;
B: commercial ELISA Bioscreen;
P: commercial ELISA Panbio;
T: commercial ELISA IDVET.