Agriculture Reference
In-Depth Information
Iceberg lettuce
AMAP: 2 %
O
2
-98 % N
2
1. Film with OTR: 110 mL
O
2
/100 in
2
/m
2
day atm.
2. The same fi lm with 40
microperforations made
with a 25 gauge syringe
needle.
3. Gas impermeable fi lm
Inoculation of
E. coli
O157:
H7
strains
4 and 15 °C for 10
days
Samples stored in
bags made from the
second fi lm had the
lowest
E. coli
populations (3.89
and 6.74 log CFU/g
when stored at 4
and 10 °C,
respectively)
Even though
fi lm 2-packed
samples had the
lowest
microbial load,
gene analysis
showed that
these storage
conditions
supported
higher levels of
virulence factor
expression,
while package
in fi lm A
(typical
commercial
packaging
conditions) had
lower virulence
expression
Sharma et al.
(
2011
)
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