Influence of applying different units of measurement on reporting antimicrobial consumption data for pig farms

BMC Veterinary Research

Table 1 Antimicrobial consumption in pigs in the Netherlands in 2012 expressed as numbers of DDDA_NL/Y, ADD_DK/Y and DADD_DK/Y is shown for all delivery records (incl.) and after exclusion of the 13950 delivery records (excl.) that could not be matched to a Danish equivalent

	Farm type	No. of farms	Total no. animals	Total no. of treatment days^b	Mean^c	Proportion of reference (%)
DDDA_NL/Y (excl.)	Sows/piglets	2326	957210^a	18381559	19.2	Reference
	Finisher pigs	4606	5388248	63476046	11.8	Reference
ADD_DK/Y	Sows/piglets	2326	957210	15328970	16.0	83.3
	Finisher pigs	4606	5388248	62321913	11.6	98.3
DADD_DK/Y	Sows/piglets	2326	957210	14658460	15.3	79.7
	Finisher pigs	4606	5388248	56189202	10.4	88.1
DDDA_NL/Y (incl.)	Sows/piglets	2338	957315	18796613	19.6	102.1
	Finisher pigs	4628	5401503	63786742	11.8	100.0

^aOnly the sows are counted. The piglets and gilts are incorporated in the standardized animal weight. See text for details
^bTotal treatable kilograms*days based on the antimicrobial deliveries per farm type for the whole year 2012. The total treatable kilograms*days were then divided by the standardized animal weight (303.8 kg for sows/piglets and 70 kg for finisher pigs) to calculate total treatment days
^cThe mean was calculated by dividing the total no. of treatable animals based on antimicrobial deliveries by the total number of animals present per farm type

ISSN: 1746-6148