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PubMed2005

Using national microbiological data to set meaningful performance criteria for slaughter and dressing of animals at Australian export abattoirs.

Slaughter establishments in Australia that export meat to the USA are required by the controlling authority, the Australian Quarantine and Inspection Service (AQIS), to test carcases under the Escherichia coli and Salmonella monitoring (ESAM) program and to use statistical process control techniques to ensure meat is produced hygienically. However, analysing the ESAM database for E. coli using standard statistical techniques proved difficult because of inter-plant variability and because the vast majority of results were below the limits of detection. As well, it is likely that, in slaughter and dressing, higher than normal microbiological counts can often be random events, for which there is neither logical explanation nor obvious management reaction. One approach to statistical process control is to set performance criteria so that a high proportion of establishments are likely to pass, while prompting individual plants to improve the process if they cannot meet the criteria. A spreadsheet-based tool was developed in Visual Basic in order to interrogate the ESAM database and to identify those plants with microbiological performance significantly different from the norm. The present paper describes how performance criteria for cattle, sheep, pigs and goats and for sub-categories within a species (e.g. sheep/lambs, cows/bulls) were established.

Abattoirs↗
PubMedDate not supplied

Abattoir observations of the weights of stomachs and their contents in pigs slaughtered at known times after their last feed.

From 15 farms, 1242 pigs (range per farm 12-169) were sent for slaughter at known times after their last feed. The time of feeding, quantity and type of last feed, time of loading, time in transit, distance travelled, time in lairage and time of slaughter, were recorded. The mean +/- SD stomach weight and wet stomach contents weight were 0.68 +/- 0.12 and 0.55 +/- 0.45 kg, respectively. There were 148 stomachs (11.9%) with wet contents weights > 1 kg, nine > 2 kg but < 3 kg, and one weighed 3.04 kg. The means and ranges for times from last feed to loading interval, time in transport, and time in lairage were 13.6 (0-40), 3.1 (0.75-6.0) and 4.1 (2.1-12.5) h, respectively. The mean and range for distance travelled was 193.1 (43-320) km. Ten stomachs were collected at random from a further load of pigs from one farm. They had been fed 0.64 kg dry pellets and were slaughtered 18.5 h later. The mean and range for wet stomach contents weight was 0.87 kg (0.24-1.33). Samples were dehydrated and the mean calculated stomach dry matter content for the 10 pigs was 127.4 +/- 69.1 g.

Abattoirs↗