Abstract:
:Two strains of Listeria monocytogenes, Scott A (serotype 4b) and Brie 1 (serotype 1b) were characterized in terms of minimum aw requirements for growth at 4 and 30 degrees C, using NaCl, glycerol and sucrose as test solutes. Both strains grew well at 30 degrees C in glycerol-supplemented tryptic soy broth (TSB), but not in NaCl- and sucrose-supplemented TSB at aw 0.90. Sucrose was more inhibitory than NaCl and glycerol. The Brie 1 strain was less tolerant to sucrose compared to the strain Scott A at both 4 and 30 degrees C. The effects of all three solutes were magnified at 4 degrees C, where tolerance to low aw was markedly less than at 30 degrees C. Results confirm that the type of solute as well as the osmotic conditions created by the solute affects the ability of Listeria monocytogenes to grow at 4 and 30 degrees C.
journal_name
Int J Food Microbioljournal_title
International journal of food microbiologyauthors
Tapia de Daza MS,Villegas Y,Martinez Adoi
10.1016/0168-1605(91)90125-9subject
Has Abstractpub_date
1991-12-01 00:00:00pages
333-7issue
3-4eissn
0168-1605issn
1879-3460pii
0168-1605(91)90125-9journal_volume
14pub_type
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