当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY期刊下所有文献 > Influence of unsliced delicatessen meat freshness upon bacterial growth in subsequently prepared vacuum packed slices.

Influence of unsliced delicatessen meat freshness upon bacterial growth in subsequently prepared vacuum packed slices.

Abstract：

:Unsliced beef pastrami, reformulated ham and bologna held at 6 degrees C were sliced 21, 17, 12 or 7 days before or at the assigned manufacturer's best before date and vacuum packaged. Packages of sliced meats were held at 6 degrees C for another 7, 12, 17 or 21 days, opened and analyses made for total bacteria, lactic acid bacteria, Enterobacteriaceae and Brochothrix thermosphacta. The maximum storage interval was 42 days; half this period unsliced, the remainder as repacked slices. Numbers of bacteria on pastrami were significantly greater than on ham and bologna (pastrami > ham > bologna) with the lactic acid bacteria dominating in all products. As unsliced meats approached their best before date, insignificant increases were generally noted for numbers of lactic bacteria, Enterobacteriaceae and B. thermosphacta. During subsequent storage of slices under vacuum, numbers of total and lactic bacteria increased exponentially at the same rate while B. thermosphacta growth was significantly slower. Numbers of Enterobacteriaceae remained low and were essentially unchanged during sliced meat storage. Within the context of study storage parameters, shelf-life appeared to be determined by length of time after slicing and repackaging rather than by best before date of the unsliced meat. Packages of sliced meat prepared from wholesale unsliced meats with 21 days left until their best before date or from unsliced meats with 12 days left until the best before date showed similar bacterial levels 21 days later. It was probable that the localization of bacterial growth at the meat surface-packaging film interface of the unsliced meats yielded slices with initially lowered bacterial content when repackaged and sampled from the uppermost slice. When Enterobacteriaceae and B. thermosphacta were absent from unsliced meats, extension of sliced meat package shelf-life beyond the best before date of the parent meat was possible. However, these bacterial groups were not always undetected.

journal_name

Int J Food Microbiol

journal_title

International journal of food microbiology

authors

Holley RA,McKellar RC

doi

10.1016/0168-1605(95)00048-8

subject

Has Abstract

pub_date

1996-04-01 00:00:00

pages

297-309

issue

2-3

eissn

0168-1605

issn

1879-3460

pii

0168-1605(95)00048-8

journal_volume

pub_type

杂志文章

在线工具

Influence of unsliced delicatessen meat freshness upon bacterial growth in subsequently prepared vacuum packed slices.