Distribution and behavior of Listeria monocytogenes in three lots of naturally-contaminated vacuum-packed smoked salmon stored at 2 and 10 degrees C.
The incidence, the number and the behavior of L. monocytogenes in three lots of naturally-contaminated vacuum-packed sliced smoked salmon, processed in different plants, were investigated during storage at 2 and 10 degrees C. L. monocytogenes was isolated from 20 of the 100 packages stored at 2 degrees C (16 from lot 1, 1 from lot 2 and 3 from lot 3) and from 12 of the 65 packages stored at 10 degrees C (all from lot 1). The levels detected were 15, 20, 290, 1100 and > 1100 cfu/g in 5 packages, all belonging to lot 1, and < 10 cfu/g in the remaining samples. The high incidence of L. monocytogenes in lot 1 was assumed to be due mainly to the use of causal workers for the slicing and packing operations.
Cortesi
M L
ML
Department of Pathology, Prophylaxis and Food Inspection, Faculty of Veterinary Medicine, Napoli, Italy.
Sarli
T
T
Santoro
A
A
Murru
N
N
Pepe
T
T
D000818:Animals; D005396:Fish Products / Q000382:microbiology*; D005519:Food Preservation; D008089:Listeria monocytogenes / Q000302:isolation & purification*; D012474:Salmon; D013696:Temperature; D014618:Vacuum