To test this we conducted dual fluorescence in situ hybridization (FISH) staining on colorectal sections of infected Muc2−/− mice as well as WT mice after infection using a Texas-Red conjugated EUB338 probe that recognizes 99% of all bacteria, as well as an AlexaFluor 488-conjugated GAM42a probe that detects γ-Proteobacter, the class to which C. rodentium belongs [58]. The gene discussed is MUC2; the disease is infection.