The Listeria monocytogenes-carrying rates were 100% fdr listeriosis patient
s and 1.3% for healthy humans. The L. monocytogenes contamination rates for
retail sliced beef (34.2%) and pork (36.4%) were significantly higher (p<0
.05) than those for cattle (2.0%) and pigs (0.8%) and for cattle (4.9%) and
swine (7.4%) carcasses. The percentages of serotypes 1/2a, 1/2b and 4b whi
ch are most dominant in human patients were high in isolates from fresh (90
.0%) and processed (100%) Fish and shellfish and imported natural cheese (9
6.7%).