To evaluate your rabies control programme, monitoring and surveillance should be in place. For rabies surveillance, brain tissue from target and (!) non-target animals needs to be collected, preferably from so-called indicator animals (see section 5.2.1; 5.2.2).
To determine bait uptake and herd immunity, teeth (canine tooth), bone (mandibula, femur, tibea) and serum samples should be collected from target animals, respectively. Often, whole carcasses are submitted to regional laboratories, where the respective tissue samples are taken during necropsy (read more here).