Four weeks post‐infection, mice were fed with water (Lb), GM17 medium containing empty vector‐bearing L. lactis (Lb/Ø) or XM17 medium containing HSP65‐producing L. lactis (Lb/HSP65) for four consecutive days, from day 28 to 31 post infection (Figure 1A). This evidence concerns the gene HSPD1 and infection.