Swine health impact on human foodborne risk
A study has been carried out to measure the
relationship between lesions suggestive of subclinical pig illness at harvest to
carcass contamination and human foodborne risk.
Over the course of eight visits between December 2005 and January 2006, 280
randomly selected carcasses were swabbed, during normal slaughter operations, at
three points in the slaughter line: skin pre-scald; the bung or pelvic cavity
following removal of the distal colon and rectum; and pleural cavity,
immediately before the final carcass rinse.
Each swab sponge was used on five carcasses in bung
and pleural cavity sampling. Swab sponges were cultured quantitatively for
Campylobacter spp., Enterococcus spp., and Enterobacteriaceae spp., and
qualitatively for Salmonella
spp. Data on health indicators were collected for all pigs in the study (2,625
pigs) by experienced plant quality assurance personnel.
Campylobacter spp. were recovered from the pleural cavity in 58.9% (33/56)
of pools (five carcasses/pool), and in 44.6% (25/56) of pools from the bung
cavity. Enterococcus spp. were recovered from 66.1% (37/56) and 35.7% (20/56) of
pleural and bung pools, respectively.
The most common lesion identified
was the peel-out (pleuritis or adhesions), with a total of 7.1% (186/2,625 total
head). Linear regression showed that for every percentage point increase in
peel-outs, Enterococcus spp. contamination increased by 4.4% and Campylobacter
spp. increased by 5.1% (p<0.05).
This study showed a correlation
between animal health and human health risk, as measured by carcass
contamination. Therefore, animal management decisions on-farm, such as housing,
antibiotic use, environment, and level of veterinary care, may directly impact
• American Association of Swine Veterinarians
Click here for
the free Pig Progress newsletter
To comment, login here
Or register to be able to comment.