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Type: Artigo de periódico
Title: Oxygen Sensitivity Of Heated Cells Of Escherichia Coli O157:h7
Author: Bromberg R.
George S.M.
Peck M.W.
Abstract: Following defined heat treatments (55 °C for 100 min, 59 °C for 5 min, 61 °C for 1 min), a 6 decimal (6-D) reduction was obtained when cells of Escherichia coli O157:H7 were enumerated in aerobic growth medium. Part of this reduction (3-D) was due to thermal inactivation (as determined when cells were enumerated in anaerobic growth medium), and part (3-D) was due to the inability of sub-lethally heat-injured cells of E. coli O157:H7 to grow in the presence of oxygen: When held anaerobically, the injured cells regained their ability to grow in the presence of oxygen. Following heating at 59 °C for 5 min, repair took 4 h at 30 °C, 48 h at 20 °C, 95 h at 10 °C, but did not occur in 816 h at 5 °C. Recovery from sub-lethal heat injury was not influenced by heat shock. These findings are relevant to the safety of minimally-heated foods.
Rights: fechado
Identifier DOI: 10.1046/j.1365-2672.1998.00482.x
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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