Materials & methods - MARAN Facebook Twitter Whatsapp Google Linkedin Email Analysis of trends in total sales FIDIN reports the total amount of antibiotics (active ingredient in kilograms) sold in the Netherlands, at the level of pharmacotherapeutic groups. The data about use of active substances are based on sales data of members of FIDIN and are estimated to cover about 98% of all sales in the Netherlands. Actual consumption can differ from the amounts sold, as a result of stockpiling and cross-border use. The figures give information about the total sales for all animals, not per individual animal species. Analysis of trends in use per species The use of different active ingredients measured in kilograms is not directly comparable due to their differences in antimicrobial potency, pharmacokinetics , and, consequently, the dosage prescription. Survey data and statistical analysis This study uses survey data from farms in the Farm Accountancy Data Network (FADN) and additional veal calf farmers.