tokens: In conclusion : ( i ) TECRA kit is suggested to be used for screening SE producing strains ; ( ii ) SET - RPLA and RIDASCREEN kits are suitable for epidemiological investigation of SE types , but the lack of ability for detecting SEE , long time required for testing with SET - RPLA kit and high background when using RIDASCREEN kit must be overcome ; and ( iii ) because of the complicated test procedures and the lack of ability for detecting SEE , the practicality of SET - EIA kit in screening and epidemiological research purposes is low .