11.07.2015 Views

Benders'dictionary of nutrition and food technology

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Three main categories:199(1) diseases caused by micro-organisms (including parasites)that invade <strong>and</strong> multiply in the body;(2) diseases caused by toxins produced by micro-organismsgrowing in the gastrointestinal tract;(3) disease caused by the ingestion <strong>of</strong> <strong>food</strong> contaminated withpoisonous chemicals or containing natural toxins or thetoxins produced by micro-organisms in the <strong>food</strong>.See also <strong>food</strong> poisoning.<strong>food</strong>borne outbreak The consumption <strong>of</strong> contaminated <strong>food</strong>from one source by a number people who later become ill.<strong>food</strong> combining See hay diet.<strong>food</strong> composition tables Tables <strong>of</strong> the chemical composition<strong>and</strong> energy <strong>and</strong> nutrient yield <strong>of</strong> <strong>food</strong>s, based on chemicalanalysis. First American tables ‘Chemical Composition <strong>of</strong>American Food Materials’ published by USDA in 1896; first UKtables ‘The Chemical Composition <strong>of</strong> Foods’ by R A McCance<strong>and</strong> E M Widdowson published in 1940. Although the analysesare performed with great precision, they are, <strong>of</strong> necessity,only performed on a few samples <strong>of</strong> each type <strong>of</strong> <strong>food</strong>. There isconsiderable variation, especially in the content <strong>of</strong> vitamins <strong>and</strong>minerals, between different samples <strong>of</strong> the same <strong>food</strong>.Therefore,calculation <strong>of</strong> energy <strong>and</strong> nutrient intakes based on use <strong>of</strong><strong>food</strong> composition tables, even when intake has been weighed,can be considered to be accurate to within only about ±10%, atbest.<strong>food</strong> intolerance See adverse reactions to <strong>food</strong>.<strong>food</strong> intoxication Illness due to ingestion <strong>of</strong> toxic compounds naturallypresent in <strong>food</strong>s, resulting from chemical contamination orformed by micro-organisms.See also adverse reactions to <strong>food</strong>; <strong>food</strong> poisoning.<strong>food</strong> phosphate factor Term applied to the resistance <strong>of</strong> bacteriato thermal destruction; defined as the ratio <strong>of</strong> the resistance toheat when present in a <strong>food</strong> to that when in phosphate buffer (atpH 6.98).The protective action <strong>of</strong> the ingredients <strong>of</strong> <strong>food</strong> rendersthe bacteria more resistant than when it is in the buffer.<strong>food</strong> poisoning May be due to:(1) contamination with harmful bacteria or other microorganisms– the commonest bacterial contamination is dueto AEROMONAS spp., BACILLUS CEREUS, CAMPYLOBACTER spp.,CLOSTRIDIUM spp., E. COLI, LISTERIA spp., SALMONELLAspp., SHIGELLA spp., STAPHYLOCOCCUS AUREUS, YERSINIAENTEROCOLITICA;

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