Aktiven nadzor pomeni dejanske akcije, s katerimi se ugotavlja prisotnost bolezni, kot so na primer sistematični klinični pregledi, ante- in post-mortem pregledi, serološke analize na kmetijah ali v klavnicah, pošiljanje patoloških materialov za laboratorijsko diagnostiko, živali detektorice.
Active surveillance implies definitive action intended to identify the presence of disease, such as systematic clinical inspections, ante and post mortem examination, serology on farm or in abattoir, referral of pathological material for laboratory diagnosis, sentinel animals.