抄録
From April, 1990 to March, 1992, a total of 107 raw meat specimens collected from slaughterhouses, supermarkets, and homes were examined for the presence of Listeria monocytogenes and other Listeria by using the modified FDA method.
Listeria monocytogenes and other Listeria were isolated from chicken (34.5 and 44.8%), pork (26.7 and 33.3%) and beef (16.7 and 37.5%), respectively.
The overall incidence of Listeria monocytogenes and other Listeria in the market distribution channel were 9.1% and 27.3% in the slaughterhouses, 31.5% and 22.2% in the supermarkets and 22.6% and 74.2% in the homes, respectively.
Sixtyseven isolates were distributed into four species, 36 as L. innocua, 26 as L. monocytogenes, 3 as L. welshimeri and 2 as L. seeligeri. The L. monocytogenes isolates were identified as predominant serovars 1/2a, 1/2b, 1/2c and 4b (76.9%).
The incidence of Listeria spp. contaminating raw meat gradually increased with longer storage. L. monocytogenes was also confirmed to be capable of growth in chicken meat at 4°C for 18 days.
