This report builds on the earlier studies of the shelf-life of chilled Australian vacuum packaged (VP) beef primals (striploin and cube roll), products distinguished in the global marketplace for unusually long shelf-life. Notable findings in those studies were a shelf-life of at least 26 weeks at -0.5°C, low microbial counts, and relatively high sensory scores. However, growth rates for total viable counts (TVC) and lactic acid bacteria (LAB) varied among the different abattoirs. The present study adds to these findings, by providing greater definition about temporal changes in bacterial communities using terminal restriction fragment length polymorphism (TRFLP) and clone library analyses of 16S ribosomal RNA (16S rRNA) gene, and measuring statistical associations among abattoir, beef cut, storage time and sensory attributes. Bacterial communities changed over time, with Carnobacterium spp. typically predominating (29-97%) at the end of storage. Variation in TRFLP profiles showed that different Carnobacterium strains predominated in different abattoirs, and that additional variation was due to the presence of other taxa typical of VP meat microbiomes. TRFLP-based community structure correlated significantly (P ≤ 0.01) with sensorial characteristics, such as vacuum integrity, confinement odour, and intact pack appearance of beef. This study shows that Carnobacterium spp. predominate on extended shelf-life VP beef primals, while other taxa may produce subtle effects on shelf-life duration.

Item Type:	Refereed Article
Keywords:	meat, microbiology, shelf-life, vacuum-packed packaging, Carnobacterium, beef primal, bacterial communities
Research Division:	Agricultural, Veterinary and Food Sciences
Research Group:	Food sciences
Research Field:	Food packaging, preservation and processing
Objective Division:	Manufacturing
Objective Group:	Processed food products and beverages (excl. dairy products)
Objective Field:	Processed meat products
UTAS Author:	Kaur, M (Dr Mandeep Kaur)
UTAS Author:	Bowman, JP (Associate Professor John Bowman)
UTAS Author:	Porteus, B (Miss Bianca Porteus)
UTAS Author:	Dann, AL (Dr Alison Dann)
UTAS Author:	Tamplin, M (Professor Mark Tamplin)
ID Code:	116786
Year Published:	2017
Web of Science® Times Cited:	25
Deposited By:	Tasmanian Institute of Agriculture
Deposited On:	2017-05-19
Last Modified:	2018-05-22
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