A big part of the known agents that infect human beings have a vertebrate as an animal reservoir, or an insect as a vector. Many of the emerging diseases are zoonoses as well. Thereby, to completely understand the health and disease issue we need a unified approach achieved only by merging the studies of human beings, domestic animals and the environment. The control of these diseases is the responsibility of the cities, states, and federal governments and that happens mainly through the Unidades de Vigilâncias de Zoonoses (UVZs), the Zoonoses Monitoring Unities, formerly known as Centros de Controle de Zoonoses (CCZs), or Zoonose Control Centers. These unities are responsible for developing initiatives and public services directed to the monitoring, prevention and control of zoonoses and accidents caused by venomous animals, actions that are relevant for public health. In that sense, the present report aims to describe the practices and operation of the Unidade de Vigilância de Zoonoses (UVZ) of Fortaleza, Ceará with information obtained along the supervised internship (I, II and III) during the period of April to August of 2019. The UVZ is registered as a health establishment with the Ministério da Saúde (Health Ministry), and it is part of the Célula de Vigilância Ambiental (Ambiental Monitoring Cell) that, in its turn, it is under the responsibility of the Coordenadoria de Vigilância em Saúde (COVIS), the Health Monitoring Coordination body. It is, therefore, bounded to the Sistema Único de Saúde (SUS), the Unified Health System. During the fulfillment of the supervised internship, it was possible to follow the UVZ’s practice development in various programs. They were: rabies control, visceral leishmaniosis, arboviruses (dengue, zika, chikungunya and yellow fever), leptospirosis, Chagas disease and malaria, and also the control of accidents by venomous animals and the program of education in health. It was possible to watch and participate in meetings, plannings, and field actions, besides experiencing the day to day life of the health professionals of the center, especially veterinarian doctors. We followed the routine of the canine visceral leishmaniosis diagnose laboratory and the entomology laboratory, both operating inside the UVZ.The magnitude of the veterinarians' importance in public health and in the consolidation of SUS was evident, through their interdisciplinary work and the application of their specific knowledge that guarantee the health of the animal population and, consequently, the human’s population well being