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2. World Health Organization. Foodborne Disease Strategy: 2010 update. United Kingdom;http://multimedia.food.gov.uk/multimedia/pdfs/fds2015.pdf(published May 2011) .
3. The Centers for Disease Control and Prevention (CDC).Salmonella.;http://www.cdc.gov/salmonella/(updated June 13, 2014) .
4. The Centers for Disease Control and Prevention (CDC). General Information,Escherichia coli (E. coli);http://www.cdc.gov/ecoli/general/index.html(updated Aug 3, 2012) .
5. The Centers for Disease Control and Prevention (CDC).Listeria monocytogenes, Pathogens & Protocols;http://www.cdc.gov/pulsenet/pathogens/listeria.html(updated Aug 5, 2013) .