Document Detail


Survival of Lactobacillus rhamnosus GG as Influenced by Storage Conditions and Product Matrixes.
MedLine Citation:
PMID:  23106385     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
  Mortality resulting from diarrhea especially that occurs in children younger than 5 y of age ranks 3rd among all deaths caused by infectious diseases worldwide. Probiotics such as Lactobacillus rhamnosus GG are clinically shown to effectively reduce the incidence of diarrhea in children. A food substrate is one of the major factors regulating the colonization of microorganisms in human gastrointestinal tracts. Peanut butter is a nutritious, low-moisture food that could be a carrier for probiotics. In this study, we observed the influence of storage conditions and product matrixes on the survival of L. rhamnosus GG. Cells of L. rhamnosus GG were inoculated into full fat or reduced fat peanut butter at 10(7) CFU/g. Inoculated peanut butter was stored at 4, 25, or 37 °C for 48 wk. Samples were drawn periodically to determine the populations of L. rhamnosus GG. Results showed that there was no significant decrease in the viable counts of L. rhamnosus GG in products stored 4 °C. The survivability of L. rhamnosus GG decreased with increasing storage temperature and time. Product matrixes did not significantly affect the survival of L. rhamnosus GG except at 37 °C. Populations of L. rhamnosus GG were preserved at >6 logs in products stored at 4 °C for 48 wk and at 25 °C for 23 to 27 wk. At 37 °C, the 6-log level could not be maintained for even 6 wk. The results suggest that peanut butter stored at 4 and 25 °C could serve as vehicles to deliver probiotics. Practical Application:  Lactobacillus rhamnosus GG is clinically shown to effectively reduce the incidence of diarrhea in children. A food substrate is one of the major factors regulating the colonization of microorganisms in human gastrointestinal tracts. Peanut butter is a nutritious, low-moisture food that could be a carrier for probiotics. In this study, we demonstrated the influence of storage conditions and product matrixes on the survival of L. rhamnosus GG. Results suggest that peanut butters could be effective delivery systems for probiotics and that probitic peanut butter could be used as one of the strategies to control diarrhea and malnutrition in developing countries.
Authors:
Yaa Asantewaa Kafui Klu; Jonathan H Williams; Robert D Phillips; Jinru Chen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-26
Journal Detail:
Title:  Journal of food science     Volume:  -     ISSN:  1750-3841     ISO Abbreviation:  J. Food Sci.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0014052     Medline TA:  J Food Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 Institute of Food Technologists®
Affiliation:
Authors Klu, Phillips, and Chen are with the Dept. of Food Science and Technology, Univ. of Georgia, 1109 Experiment St. Griffin, GA, 30223-1797, U.S.A. Author Williams is with the Peanut Collaborative Research Support Program, Univ. of Georgia, 1109 Experiment Street, Griffin, GA 30223, U.S.A. Direct inquiries to author Chen (E-mail: jchen@uga.edu).
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