Comparison of five basal compositions of selective chocolate agar media for isolation of Taylorella equigenitalis

•No selective chocolate agar medium has been developed for CEM since the 1980s•Fastidious nature of CEMO and interfering bacteria limited the performance of media•Blood, Mueller-Hinton or Tryptose Blood agar could replace Eugon or Columbia agar•Basal agar/supplier pair must be validated with a panel of T. equigenitalis strains•Mix of amino acids, nucleotides, and organic, mineral and vitamin compounds is needed