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Fate of enteric pathogens in different spinach cultivars cultivated in growth chamber and field systems

Food Quality and Safety 2018年第4期2卷 221-228页

作者： Marilyn C.Erickson Jye-Yin Liao Alison S.Payton Peter W.Cook Henk C.Den Bakker jesus bautista Juan Carlos Díaz Pérez Department of Food Science and Technology Center for Food SafetyUniversity of Georgia1109 Experiment St.GriffinGA 30223-1797USA and Department of Horticulture University of Georgia2360 Rainwater Rd.TiftonGA 31793-5766USA

between enteric pathogens and plant hosts have been shown to be *** series of studies sought to expand our knowledge in this area and evaluate whether spinach cultivar selection may be used to curtail pathogen contamination and ultimately reduce microbiological risk associated with this *** a component to that assessment,potential antimicrobials that were constituents within spinach leaves were first analysed and found to be spatially non-uniform,being more concentrated on the outer edges of the leaves than in the centre of the ***,the entire foliage of a plant was sampled in subsequent studies examining the fate of Salmonella and Escherichia coli O157:H7 on seven cultivars of *** did not affect the degree of Salmonella internalized into spinach tissue(P>0.05);however,it appeared that those Salmonella that were internalized were transient residents as the percentage of plants containing this internalized pathogen dropped within 24 *** relationship existed between antimicrobial levels(total phenols or antioxidant capacity)of the spinach cultivars and the prevalence of plants exhibiting Salmonella internalization or the persistence of Salmonella or *** O157:H7 after the plants had been sprayed with the *** both growth chamber and field studies,Salmonella was more resistant than *** O157:H7 to *** affected the persistence of both *** O157:H7 and Salmonella but the ranking for each pathogen’s survival on three of those cultivars differed suggesting the difficulty in finding one cultivar that would be inhospitable to multiple pathogens.

关键词： spinach cultivars internalization survival phenols antioxidant capacity Salmonella E.coli O157:H7.

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