Application of high pressure processing to reduce verotoxigenic E. coli in two types of dry-fermented sausage.
The effect of high pressure processing (HPP) on the survival of verotoxigenic Escherichia coli (VTEC) in two types of Norwegian type dry-fermented sausages was studied. Two different types of recipes for each sausage type were produced. The sausage batter was inoculated with 6.8 log(10) CFU/g of VTEC O103:H25. After fermentation, drying and maturation, slices of finished sausages were vacuum packed and subjected to two treatment regimes of HPP. One group was treated at 600 MPa for 10 min and another at three cycles of 600 MPa for 200 s per cycle. A generalized linear model split by recipe type showed that these two HPP treatments on standard recipe sausages reduced E. coli by 2.9 log(10) CFU/g and 3.3 log(10) CFU/g, respectively. In the recipe with higher levels of dextrose, sodium chloride and sodium nitrite E. coli reduction was 2.7 log(10) CFU/g in both treatments. The data show that HPP has a potential to make the sausages safer and also that the effect depends somewhat on recipe.
Omer
M K
MK
Animalia, Norwegian Meat and Poultry Research Center, P.O. Box 396 Økern, N-0503 Oslo, Norway. Mohamed.Abdella@animalia.no
Alvseike
O
O
Holck
A
A
Axelsson
L
L
Prieto
M
M
Skjerve
E
E
Heir
E
E
D000818:Animals; D058491:Bacterial Load; D002417:Cattle; D004926:Escherichia coli / Q000254:growth & development*; D005285:Fermentation; D005511:Food Handling / Q000379:methods; D005516:Food Microbiology; D018857:Food Packaging / Q000379:methods; D005519:Food Preservation / Q000379:methods*; D059022:Food Safety; D005947:Glucose / Q000032:analysis; D008461:Meat Products / Q000032:analysis / Q000382:microbiology*; D050296:Microbial Viability; D008954:Models, Biological; D011312:Pressure; D012965:Sodium Chloride / Q000032:analysis; D012977:Sodium Nitrite / Q000032:analysis; D013552:Swine; D014618:Vacuum
D012965:Sodium Chloride; D005947:Glucose; D012977:Sodium Nitrite