Abstract:
:Minimum growth temperatures of Hafnia alvei (n = 156) and other Enterobacteriaceae isolates (n = 162) from refrigerated meat samples (n = 88) and control strains of H. alvei (n = 81) from clinical and environmental samples were determined with a plate-type continuous temperature gradient incubator on nutrient agar. The dominant species, Hafnia alvei and Serratia liquefaciens had mean minimum growth temperatures of 2.6 (range, 0.2-3.7 degrees C) and 1.7 (range, 0.2-2.6 degrees C), respectively. Values for other species included: Enterobacter agglomerans, 1.3 (0.7-1.7 degrees C); Escherichia coli, 8.7 (8.4-8.9); Escherichia vulneris, 1.6 (0.8-2.6 degrees C); and Serratia fonticola, 2.0 (1.1-3.0 degrees C). The H. alvei reference strains did not differ markedly from the meat isolates, with the exception of the diarrhoeagenic eae A positive strains (10.6, 10.2-11.5 degrees C). The representatives of H. alvei hybridization groups (HG) 1 and 2 did not differ in their minimum growth temperatures. The observed heterogeneity of the minimum growth temperatures of many Enterobacteriaceae species may be explained by limitations of the systems used for identification of enterobacteria, inadequacy of the Enterobacteriaceae taxonomy or true growth temperature heterogeneity within the various species.
journal_name
Int J Food Microbioljournal_title
International journal of food microbiologyauthors
Ridell J,Korkeala Hdoi
10.1016/s0168-1605(96)01248-2subject
Has Abstractpub_date
1997-04-15 00:00:00pages
287-92issue
3eissn
0168-1605issn
1879-3460pii
S0168160596012482journal_volume
35pub_type
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