translate English to French: The new enrichment medium consists of 1.5-strength trypticase soy broth, 1 mM 4-chloro-2-cyclopentylphenyl β-D-galactopyranoside (CPPG), 0.25% lactose, and 0.1 M citrate buffer (pH 6.2).
Ce nouveau milieu d'enrichissement contient du bouillon trypticase soja de force 1.5, du 4-chloro-2-cyclopentylphényl β-D-galactopyranoside (CPPG) à concentration de 1 mM, du lactose (0.25%) et du tampon citrate 0.1 M (pH 6.2).