2.1 Descriptive analysis of movements
Swine movements in each study year were described (2017–2019), as well as their productive categories by age and sex. Then, we analysed the number of pigs and movements according to their type of premise in every year, the annual averages and the number of pigs per batch (movement) and the issuance of movement certificates directly by producers (using their individual accounts) and through the service’s officials.