In my research I’m focussing a lot on the immune cells in the brain, the microglia, in order to assess if manipulations to the microbiome shapes the behavior of them and their activation grade. I attached you an immunohistochemistry picture – here you see microglia in the hippocampus of an aged mouse. Particularly the picture shows the dentate gyrus region of the hippocampus (the white packed areas which have a high density of neurons but no microglia), in the zone where new neurons are born (neurogenesis).