1. Statutory Instrument 1993 Number 1898;Anon,1993
2. Salmonella Enteritidis non-phage type 4 infections in England and Wales 2000 to 2004: report from a multi-agency national outbreak control team;Anon;Eurosurveillance,2004a
3. Anon 2004b Baseline study on the prevalence of Salmonella in laying flocks of Gallus gallus in the EU. Technical specifications. SANCO/34/2004 Rev3 annexed to Decision 2004/665/EC Presented at the Meeting of the Standing Committee on the Food Chain and Animal Health on 15 July 2004 http://ec.europa.eu/food/food/biosafety/salmonella/tech_spec_sanco-34-2004_rev-3_en.pdf