Water, sodium chloride and acidified sodium chlorite effects on Eseherichia coli O157:H7 and Staphylococcus aureus on beef briskets

Effectiveness of spray application of potable water wash (WW), 25% (w/v) sodium chloride (NaCl), and 0.1% (v/v) acidified sodium chlorite (ASC) was evaluated against Escherichia coli O157:H7 and Staphylococcus aureus inoculated onto beef briskets. The purpose was to identify antimicrobial treatments which may be applied to beef carcasses and more specifically in kosher meat facilities. Treatments were applied for 10-60 s at pressure of 419 kPa. Water wash, NaCl, and ASC significantly reduced E coli O157:H7 as compared with the control, although, only ASC resulted in improved removal with increased exposure time. Water wash did not significantly reduce S. aureus counts throughout exposure and NaCl was only effective after 60 s of exposure, while ASC reduced counts throughout exposure. E coli O157:H7 was twice as sensitive to WW and NaCl as S. aureus in terms of percent reduction in cell count. (C) 2004 Elsevier Ltd. All rights reserved.