The sample/survey system ClassyFarm, developed by the Istituto Zooprofilattico Sperimentale della Lombardia e Dell'Emilia Romagna (IZSLER) is owned by the Italian Ministry of Health. It started in 2014 for pigs, in 2016 for dairy cattle and in 2019 for poultry farms. Trails on beef farms have started as well. Currently, for pig and dairy cattle, it is based on a convenience sample of 150-250 farms. For broilers and turkeys, data on 2015-2018 AMU has been collected for more than 80% of Italian poultry production. A full integration with the Italian electronic prescription system is planned during 2019-2020.

Data collection

Animal subcategoriesThe distinguished weight categories in pigs are sows/boars, finishers, weaners and sucklers; in dairy cattle cows, heifers and calves are distinguished and in poultry broilers, turkeys and laying hens.

InputThis is the responsibility of the IZLER staff, with assistance of vets and farmers. Data sources of consumption are treatment registries, invoices, prescriptions and companies’ databases (poultry only).


The dose-based unit of measurement DDDAit is used to calculate the number of days per animal per period (which can be a semester or a year = the time-frame). Each active ingredient is considered as a single treatment, whether it is part of a combination product or not, with the exception of intramammary and intrauterine antimicrobials. The main indicator is days of treatment per animal per year; other indicators, such as days per semester may be provided as additional information. For finishers and the cattle subcategories, weights at treatment are standard estimations set on national level. For the other weight categories, EMA[1] weights are used.



A farm’s AMU is compared to the median of all farms at weight group-level and is also classified according to its quartile. Furthermore, other comparisons are available such as with medians at different geographical levels (i.e. national, regional, city), veterinarian-level, or company-level. Usage of WHO’s HPCIAs (fluoroquinolones, 3rd and 4th generation cephalosporins, colistin and macrolides) are highlighted. The methodology is however currently under review. Particularly, Particularly, introduction of a treatment incidence 100 (TI100) as main indicator is under assessment.


Farmers, vets and farmer groups/associations receive written reports and an oral presentation. Interactive dashboards for pig production are available for authorised veterinarians (officers and practitioners), with dashboards for farmers being developed.

More information and contact