A Through-chain Analysis of Food Safety Hazards and Control Measures Associated with the Production and Supply of Seed Sprouts for Human Consumption

Abstract

Background: Seed sprouts contaminated with pathogenic microorganisms, such as Salmonella spp. and Shiga toxin-producing Escherichia coli (STEC) present an unacceptable health risk to consumers. An outbreak that occurred in Australia during 2005 and 2006 due to the consumption of alfalfa sprouts contaminated with Salmonella Oranienburg resulted in 141 infected cases, and cost an estimated $1.19 million to the Australian community. In Japan in 1996, consumption of radish sprouts contaminated with STEC O157:H7 affected more than 10,000 individuals. The outbreak of E. coli O104:H4 linked to the consumption of fenugreek sprouts that occurred in Europe in 2011 was an unprecedented foodborne outbreak. More than 4,000 individuals were infected by STEC O104:H4. Among them, 908 developed haemorrhagic uraemic syndrome (HUS), and 50 died of STEC infection. This demonstrates the potential food safety risk arising from seed sprouts and that the consequences can be devastating. Food Standards Australia New Zealand (FSANZ) initiated the development of a primary production and processing standard for seed sprouts in 2009 to enhance the safety of seed sprouts produced and sold in Australia. After extensive consultations with the State and Territory food safety regulators, and a thorough investigation of the Australian Grey Literature European Journal of Nutrition & Food Safety, 4(4): 424-428, 2014 425 industry practices in producing seed sprouts for human consumption, a technical paper was prepared to inform the design of potential risk mitigation measures for a national food safety standard on seed sprout production. This technical paper described the Australian seed sprout industry, depicted the steps involved in the production of seed sprouts for human consumption, and provided an analysis of potential food safety hazards that could occur during seed sprout production and processing. A food safety standard for the production and sale of seed sprouts in Australia was finalised in November 2011. This extended abstract describes the key aspects of the technical paper. Aims: To provide technical and scientific information to support risk management decisions aimed at maximizing the safety of seed sprouts produced for human consumption in Australia. Study Design: A through-chain qualitative food safety risk analysis. Place and Duration of Study: FSANZ, Canberra, Australia, between July 2009 and January 2010. Methodology: This through-chain risk analysis was prepared upon a comprehensive review of literature available at the time on: investigations of foodborne outbreaks associated with consumption of seed sprouts; surveys of microbial contamination of seed sprouts; specific publications on crop production, seed harvest, post-harvest processing and storage of seeds; production of seed sprouts; risk assessments on seed sprouts; and regulatory guidelines published by Australian and international food safety regulatory authorities on seed sprouts. Members of the FSANZ project team conducted field studies of sprout production, lucerne crop production, lucerne seed processing, wholesale and retail sale of seed sprouts. A survey was conducted on the variety, volume and value of sprouts produced, source and quantity of seeds used to produce sprouts for human consumption, trend of consumption of seed sprouts in Australia, as well as the size and the location of sprout producers in Australia. Stakeholders were consulted through a FSANZ standard development committee with participants from State and Territory food safety regulators, peak sprout producer industry bodies, seed producers and seed processors, major food retailers, and consumer representatives. The through-chain analysis of food safety hazards associated with the production and processing of seed sprouts was prepared in line with the principles of hazard analysis critical control points (HACCP).