Effect of moisture on salmonella spp. heat resistance in cocoa and hazelnut shells

被引:27
作者
Izurieta, Walter Penaloza [2 ]
Komitopoulou, Evangelia [1 ]
机构
[1] Leatherhead Food Res Assoc, Food Safety Res Dept, Leatherhead KT22 7RY, Surrey, England
[2] Nestec Ltd, Nestle Res Ctr, CH-1000 Lausanne 26, Switzerland
关键词
Salmonella; Heat resistance; Dry nut shells; Effect of added moisture; ENTERITIDIS PHAGE TYPE-30; CONTAMINATED CHOCOLATE; INTERNATIONAL OUTBREAK; WATER ACTIVITY; RAW ALMONDS; PECAN NUTMEATS; PEANUT BUTTER; INFRARED HEAT; TYPHIMURIUM; REDUCTION;
D O I
10.1016/j.foodres.2011.09.024
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
The heat resistance of food-poisoning outbreak and non-outbreak associated strains of Salmonella (S. Enteritidis, S. Montevideo, S. Napoli, S. Oranienburg, S. Poona, S. Senftenberg and S. Typhimurium) was established in confectionery-related materials such as crushed cocoa bean and hazelnut shells at low moisture contents (<= 4% w/w). The two most heat resistant strains in cocoa and hazelnut shells at ca. 4% w/w moisture were S. Oranienburg and S. Enteritidis PT30. Both strains were associated with outbreaks from dried materials. Their D-100 degrees C values were ca. 2.5 min in crushed cocoa bean shells and 7-11 min in crushed hazelnut shells. Addition of moisture to ca. 7% w/w markedly reduced D-values (D-80 degrees C of 2-4.5 min) for both strains in the two matrices. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:1087 / 1092
页数:6
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