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Behaviour of Listeria monocytogenes in packaged fresh mushrooms ( Agaricus bisporus )
Author(s) -
GonzálezFandos E.,
Olarte C.,
Giménez M.,
Sanz S.,
Simón A.
Publication year - 2001
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1046/j.1365-2672.2001.01452.x
Subject(s) - listeria monocytogenes , agaricus bisporus , food science , mushroom , microbiology and biotechnology , listeria , biology , vacuum packing , mesophile , inoculation , food preservation , bacteria , horticulture , genetics
Aims: The aim of this study was to evaluate the potential of Listeria monocytogenes to grow in mushrooms packaged in two different types of PVC films when stored at 4°C and 10°C. Methods and Results: Mushrooms were packed in two polymeric films (perforated and nonperforated PVC) and stored at 4°C and 10°C. The carbon dioxide and oxygen content inside the packages, aerobic mesophiles, psychrotrophs, Pseudomonas spp., Listeria monocytogenes , faecal coliforms, Escherichia coli , anaerobic spores and major sensory factors were determined. The mushrooms packaged in nonperforated film and stored at 4°C had the most desirable quality parameters (texture, development stage and absence of moulds). Listeria monocytogenes was able to grow at 4°C and 10°C in inoculated mushrooms packaged in perforated and nonperforated films between 1 and 2 log units during the first 48 h. After 10 d of storage, the populations of L. monocytogenes were higher in mushrooms packaged in nonperforated film and stored at 10°C. Conclusions: MAP followed by storage at 4°C or 10°C extends the shelf life by maintaining an acceptable appearance, but allows the growth and survival of L. monocytogenes . Significance and Impact of the Study: According to this study additional hurdles must be studied in order to prevent the growth of L. monocytogenes .