FACTORS INVOLVED IN THE EMERGENCE AND PERSISTENCE OF FOOD-BORNE DISEASES

In recent years, a number of bacteria, viruses, and parasites have eme rged as food-borne pathogens and resulted in numerous food-borne disea se outbreaks. These outbreaks have had a major impact in terms of loss of human lives and economic costs. Genetic changes in microorganisms resulting in increased virulence, changes in social attitudes and eati ng habits, changes in food production and distribution systems, an inc rease in the number of immunocompromised individuals, and improved pat hogen-detection methods are some of the factors that have contributed to the emergence/recognition and persistence of food-borne pathogens. The causes leading to the emergence of new food-borne pathogens or the reemergence of pathogens involve the interaction of several factors. This review discusses in detail factors involved in the emergence/reco gnition and persistence of several bacterial, parasitic, viral, and vi rus-like agents associated with food-borne diseases of public-health s ignificance.