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In these technical specifications two types of trend monitoring are identified: trend watching, which covers the general observation of harmonised or non-harmonised data for possible temporal trends, and trend analyses which means statistical analyses of harmonised data for the detection of trends over time. The difference between trend watching and trend analyses is in the strength of the evidence identifying the existence of trend over years.
Based on data available from 2004 to 2007, the following fields are suggested suitable for trend analyses: Salmonella in fresh broiler and pig meat, flocks of laying hens and broilers, slaughter and breeding pigs as well as fattening turkey flocks; Campylobacter in fresh broiler meat; Listeria monocytogenes in smoked fish; Mycobacterium bovis in herds of co-financed non-officially bovine tuberculosis free Member States; Brucella in bovine and caprine/ovine herds of co-financed non-officially brucellosis free Member States; Verotoxigenic Escherichia coli O157 in cattle; and Echinococcus multilocularis in red foxes. It is proposed that this list be revised on a regular basis taking into account new scientific knowledge regarding zoonotic agents, their prevalence in different categories of food/animal populations, their incidence in humans and also based on new Community legislation.
http://www.efsa.europa.eu/en/scdocs/scdoc/1530.htm
