Outcomes of a examine recommend that Salmonella prevalence in pigs at slaughter in the UK didn’t change a lot from 2013 to 2019.
Findings are from an abattoir-based survey that sampled cecal contents pigs in 9 British pig abattoirs throughout 2019. The cecum is firstly of the big gut.
Salmonella was remoted from 112 of 348 samples collected at slaughter from animals at 286 farms; a prevalence of 32.2 %. Most pigs got here from farms in England with some from Scotland and Wales, in keeping with the examine revealed within the journal Epidemiology and An infection.
Twelve totally different Salmonella serovars have been remoted, with the most typical being Salmonella 4,,12:i:-, a monophasic variant of Salmonella Typhimurium, adopted by Salmonella Derby. Salmonella Ohio and Salmonella Kedougou have been solely present in a single pattern every.
Related outcomes to 2013
Business has tried measures to regulate Salmonella in pig herds, by way of elevated biosecurity, improved cleansing and disinfection, use of natural acids and vaccination.
There was no vital change in comparison with the general prevalence of 30.5 % within the final abattoir survey within the UK in 2013.
There was additionally no main distinction in Salmonella isolation from the cecal samples collected at every of the 9 abattoirs.
Cecal samples have been collected throughout 12 months, with between 19 and 38 examined every month. Month-to-month variations in constructive samples have been seen with peaks in Salmonella remoted from cecal contents in February, March and October.
“Persevering with surveillance at slaughter is beneficial to evaluate impacts of farm-based and abattoir-based interventions and to watch potential public well being threat related to consumption of Salmonella-contaminated pork merchandise,” mentioned researchers.
Distinction between varieties of swabs
In 2019, of the three,785 carcasses examined within the UK, 1.72 % have been Salmonella constructive. This was down from 2018, when 2.87 % of three,839 carcasses have been constructive. These samples have been taken by meals companies and examined in non-public laboratories.
Carcass swabs present a sign of Salmonella contamination on the pig after the slaughter course of, and is a greater marker for the danger to public well being.
Pigs arriving at slaughter usually have larger Salmonella prevalence than on the farm. It’s because they could restart shedding after being uncovered to hectic occasions akin to transport or due to new contamination and an infection throughout transit or on the abattoir.
Slaughter hygiene practices contribute to the prevalence of pork carcass contamination, and a major distinction between Salmonella prevalence in cecal contents and carcass swabs is to be anticipated, in keeping with the analysis.
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