Resistance of Cronobacter sakazakii in reconstituted powdered infant formula during ultrasound at controlled temperatures: A quantitative approach on microbial responses

被引：36

作者：

Adekunte, A. ^{[1
]}

Valdramidis, V. P. ^{[1
,2
]}

Tiwari, B. K. ^{[3
]}

Slone, N. ^{[1
]}

Cullen, P. J. ^{[2
]}

Donnell, C. P. ^{[1
]}

Scannell, A. ^{[1
]}

机构：

[1] Univ Coll Dublin, UCD Sch Agr Food Sci & Vet Med, Dublin 4, Ireland

[2] Dublin Inst Technol, Sch Food Sci & Environm Hlth, Dublin 1, Ireland

[3] Manchester Metropolitan Univ, Dept Food & Tourism, Manchester M14 6HR, Lancs, England

来源：

INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY | 2010年 / 142卷 / 1-2期

关键词：

Cronobacter sakazakii; Ultrasound; Predictive microbiology; Inactivation; Non-thermal technologies; PULSED ELECTRIC-FIELD; ENTEROBACTER-SAKAZAKII; THERMAL INACTIVATION; SURVIVAL CURVES; MILK FORMULA; HEAT; REDUCTION; PROFILE; SPORES; GROWTH;

D O I：

10.1016/j.ijfoodmicro.2010.05.028

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

Many of the documented outbreaks of Cronobacter sakazakii have been linked to infant formula. The aims of this work are to monitor the inactivation kinetics of C sakazakii NCTC 08155 and ATCC 11467 and to determine quantitatively the effectiveness of ultrasonic treatments as an alternative to heat processing of reconstituted infant milk formula before feeding of infants at highest risk. Inactivation studies of C. sakazakii inoculated in reconstituted infant formula were performed at the combined conditions of temperature, i.e., 25 degrees C, 35 degrees C, 50 degrees C and amplitude, i.e., 24.4, 30.5, 42.7, 54.9, 61 mu m and the kinetics were described by a range of inactivation models. The dependency of the specific inactivation rate with respect to the product of temperature and amplitude was described by a modified Bigelow type model. Ultrasound combined with temperature was efficient to reduce significantly the microbial levels of C. sakazakii. C. sakazakii strain NCTC 08155 was at the same range of temperature and amplitude resistance as strain ATCC 11467. Application of ultrasound is an alternative process for the production of safe reconstituted infant formula. This study contributes on the quantitative assessment of the resistance of C. sakazakii. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：53 / 59

页数：7