Ulster University Logo

Comparison of aerial counts at different sites in beef and sheep abattoirs and the relationship between aerial and beef carcass contamination

Okraszska-Lasica, W, Bolton, D J, Sheridan, J J and McDowell, D A (2012) Comparison of aerial counts at different sites in beef and sheep abattoirs and the relationship between aerial and beef carcass contamination. Food Microbiology, 32 (2). pp. 325-331. [Journal article]

[img] PDF - Published Version
Restricted to Repository staff only

497kB

DOI: 10.1016/j.fm.2012.07.008

Abstract

The study examined and compared levels of aerial contamination in commercial beef and sheep plants at four sites, i.e. lairage, hide/fleece pulling, evisceration and chilling. Aerial contaminationwas determined by impaction and sedimentation onto Plate Count Agar to enumerate Total Viable Counts, MacConkey Agar to enumerate coliforms and Violate Red Bile Glucose Agar to enumerate Enterobacteriaceae. The levels of aerial contamination were similar at equivalent sites in beef and sheep plants, irrespective of the samplingmethod or the type of organisms recovered. Mean log counts recovered on each medium in the chillers were generally significantly lower (P <.05) than the corresponding mean log numbers recovered at the other three sites. The relationship between impaction (air) and sedimentation (surface) counts could be described by the surface to air ratio (SAR) which in this study had an R2 of 0.77. Further studies in an experimental plant compared counts recovered from the neck of beef carcasses with aerial counts determined by impaction and sedimentation onto agar and irradiated meat pieces. A relationship between counts on beef carcasses and in the air could not be established, irrespective of the method usedto compare counts.

Item Type:Journal article
Keywords:Aerial contamination, Abattoirs, Beef, Sheep, Carcasses
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Health Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
ID Code:24978
Deposited By: Professor David McDowell
Deposited On:15 Feb 2013 14:43
Last Modified:10 May 2017 11:29

Repository Staff Only: item control page