NOD1 and infection: When comparing the weight loss of mice post-infection we observed that Nod1−/− mice and a single-surviving WT mouse started to recover their weight from day 4 post-infection (pi), whereas all other WT mice sharply declined in weight and succumbed to the infection and the three non-surviving Nod1−/− mice demonstrated a similar weight loss as WT mice (Figure 2C).