| Literature DB >> 28221903 |
Y I Chen1, Laurel S Burall2, Dumitru Macarisin1, Régis Pouillot3, Errol Strain3, Antonio J DE Jesus1, Anna Laasri1, Hua Wang1, Laila Ali1, Aparna Tatavarthy1, Guodong Zhang1, Lijun Hu1, James Day1, Jihun Kang2, Surasri Sahu2, Devayani Srinivasan2, Karl Klontz3, Mickey Parish4, Peter S Evans1, Eric W Brown1, Thomas S Hammack1, Donald L Zink4, Atin R Datta2.
Abstract
A most-probable-number (MPN) method was used to enumerate Listeria monocytogenes in 2,320 commercial ice cream scoops manufactured on a production line that was implicated in a 2015 listeriosis outbreak in the United States. The analyzed samples were collected from seven lots produced in November 2014, December 2014, January 2015, and March 2015. L. monocytogenes was detected in 99% (2,307 of 2,320) of the tested samples (lower limit of detection, 0.03 MPN/g), 92% of which were contaminated at <20 MPN/g. The levels of L. monocytogenes in these samples had a geometric mean per lot of 0.15 to 7.1 MPN/g. The prevalence and enumeration data from an unprecedented large number of naturally contaminated ice cream products linked to a listeriosis outbreak provided a unique data set for further understanding the risk associated with L. monocytogenes contamination for highly susceptible populations.Entities:
Keywords: Enumeration; Ice cream; Listeriosis outbreak
Mesh：
Year: 2016 PMID： 28221903 DOI： 10.4315/0362-028X.JFP-16-208
Source DB: PubMed Journal: J Food Prot ISSN： 0362-028X Impact factor: 2.077