Division 2.2 Sample size

F1The appropriate authority must test 170 isolates for antimicrobial susceptibility testing for each combination of bacterial species and type of sample of animal population or food category listed in point 1(a), (b), (c), (e) and (f). However, F2if there is a production of less than 100 000 tonnes of poultry meat slaughtered per year and less than 100 000 tonnes of pig meat slaughtered per year^f1 F3in the United Kingdom, F4its shall test 85 isolates instead of 170 isolates for each corresponding specific combination.

F5If, in any given year, a higher number of isolates for some of the combinations of bacterial species and type of sample of animal population or food category listed in point 1(a), (b), (c), (e) and (f) is available, all isolates or a representative random selection equal to or greater than the number of isolates required in accordance with the first paragraph, shall be included in the antimicrobial susceptibility testing.

If, due to a low bacterial prevalence or low number of epidemiological units, in any given year, the number of isolates required in accordance with the first paragraph for some of the combinations of bacterial species and type of sample of animal population or food category listed in point 1(a), (b), (c), (e) and (f), cannot be achieved, all available isolates at the end of the monitoring period shall be included in the antimicrobial susceptibility testing.

For the specific monitoring of ESBL- or AmpC- or carbapenemase-producing indicator commensal E. coli set out in point 4.1, F6the appropriate authority must analyse 300 samples of each of the animal population and food category, listed in point 1(d). However, F7if there is a production of less than 100 000 tonnes of poultry meat slaughtered per year, less than 100 000 tonnes of pig meat slaughtered per year and less than 50 000 tonnes bovine meat slaughtered per year^f2 F8in the United Kingdom the the appropriate authority must analyse 150 samples instead of 300 samples for each corresponding specific combination.