Review of the impact of pre-slaughter feed curfews of cattle, sheep and goats on food safety and carcase hygiene in Australia

The overall prevalences of Campylobacter, S. enterica and E. coli O157/O145 were generally low (<6%), but point prevalences ranged considerably in healthy sheep (up to 26% for E. coli O157/O145). Further work to determine risk factors for shedding of bacterial organisms in meat sheep in the pre-slaughter period (on-farm, sale yards and lairage at abattoirs) could further reduce the risk of contamination of meat products.

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“…and E. coli spp.) . The time spent off‐feed prior to sampling was not known for the lines sampled in the present study.…”

Section: Discussionmentioning

confidence: 99%

Prevalence and pathogen load of Campylobacter spp., Salmonella enterica and Escherichia coliO157/O145 serogroup in sheep faeces collected at sale yards and in abattoir effluent in Western Australia

et al. 2017

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“…The role of common stressors in sheep 247 meat enterprises (for example, transport, curfew-lairage periods during which feed and water is 248 withheld, mixing of groups of animals, seasonal factors and management practices such as 249 shearing) may affect meat quality, and potentially affect shedding of zoonotic pathogens in faeces, 250 although the impact on these factors on pathogen shedding have not been well described. There is 251 evidence that for bacteria at least, protracted fasting may cause the bacterial load to be more 252 hazardous (Pointon et al, 2012). The time spent off feed prior to sampling was not known for the 253 lines of sheep sampled in the present study.…”

Section: Giardia In Faeces Collected From Sheep At Saleyards In Westementioning

confidence: 92%

Prevalence and pathogen load of Cryptosporidium and Giardia in sheep faeces collected from saleyards and in abattoir effluent in Western Australia

Yang

Gardner

Ryan

et al. 2015

Small Ruminant Research

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“…These studies typically relied on molecular analysis and cultivation of STEC using selective media. The findings contributed to the hypothesis that microbial contaminants transfer from fecally contaminated hides onto the carcasses and ultimately onto the beef product (2,4,12,15,30). More recently, high-throughput sequencing technologies and bioinformatic software have enabled researchers to understand STEC contamination of beef at resolutions that were not achievable with conventional microbiological methods (7,18,21,23).…”

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confidence: 93%

Analysis of Bacterial Diversity in Relation to the Presence of the Top 7 Shiga Toxin–Producing Escherichia coli throughout Australian Beef Abattoirs

Kang

Ravensdale²,

Coorey

et al. 2020

Journal of Food Protection

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There is increasing evidence that diversity changes in bacterial communities of beef cattle correlates to the presence of Shiga toxin-producing Escherichia coli (STEC). However, studies that found an association between STEC and bacterial diversity have been focused on pre-slaughter stages in the beef supply chain. This study was designed to test a hypothesis that there is no differences in bacterial diversity between samples with and without the presence of Top 7 STEC (O26, O45, O103, O111, O121, O145 and O157) throughout processing in an integrated (abattoir A) and a fragmented (abattoir B) Australian beef abattoir. Slaughter and boning room surface samples from each abattoir were analysed using 16S rRNA amplicon sequencing and tested for Top 7 STEC following the Food Safety Inspection Services protocol. Potential positives (PPs) through slaughter were similar between the abattoirs (64 – 81%). However, abattoir B had substantially reduced PPs in the boning room compared to abattoir A (A: 23% and 48%, B: 2% and 7%). Alpha diversity between the sample groups was not significantly different (P>0.05) regardless of different STEC markers. Non-metric multidimensional scaling (nMDS) of slaughter samples showed that the bacterial composition in faecal and hide samples shared the least similarity with the communities in carcase and environmental samples. Surface samples from slaughter (carcase and environmental) and boning (carcase, beef trim and environmental) all appeared randomly plotted on nMDS. This indicated that the STEC presence also did not have a significant effect (P>0.05) on beta diversity. While presence of STEC appeared to correlate with changes in diversity of faecal and hide bacterial communities in previous studies, it did not appear to have the same effect on other samples throughout processing.

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Review of the impact of pre-slaughter feed curfews of cattle, sheep and goats on food safety and carcase hygiene in Australia

Cited by 40 publications

References 82 publications

Prevalence and pathogen load of Campylobacter spp., Salmonella enterica and Escherichia coliO157/O145 serogroup in sheep faeces collected at sale yards and in abattoir effluent in Western Australia

Prevalence and pathogen load of Campylobacter spp., Salmonella enterica and Escherichia coliO157/O145 serogroup in sheep faeces collected at sale yards and in abattoir effluent in Western Australia

Prevalence and pathogen load of Cryptosporidium and Giardia in sheep faeces collected from saleyards and in abattoir effluent in Western Australia

Analysis of Bacterial Diversity in Relation to the Presence of the Top 7 Shiga Toxin–Producing Escherichia coli throughout Australian Beef Abattoirs

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