Survival of Salmonella typhimurium ATCC 14028 on the surface of chicken legs or in mechanically deboned chicken meat gamma irradiated in air or vacuum at temperatures of -20 to +20 C

Journal Article · Mon Apr 01 00:00:00 EST 1991 · Poultry Science; (United States)

DOI:https://doi.org/10.3382/ps.0701026· OSTI ID:5263333

Thayer, D W; Boyd, G ^[1]

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1. Food Safety Research Unit, Agricultural Research Service, Philadelphia, PA (USA)

Response-surface methodology was used to develop predictive equations for the response of Salmonella typhimurium ATCC 14028 on the surface of chicken legs or within mechanically deboned chicken meat (MDCM) to the effects of {gamma} radiation doses of 0 to 3.60 kGy (100 krad = 1 kGy) at temperatures of -20 to +20 C in air or vacuum. A streptomycin-resistant mutant was used in these studies to allow accurate estimations of the surviving salmonellae in the presence of residual normal flora. This strain has been demonstrated to have no significant shift in its biological properties nor in its resistance to ionizing radiation. The response of S. typhimurium to gamma radiation was similar on both chicken legs and MDCM. The radiation was significantly more lethal to the bacterial cells at temperatures above freezing. The response-surface equations developed from the studies predict that the number of viable cells per gram of MDCM or per square centimeter of the surface of chicken legs would be reduced approximately 2.8 to 5.1 log units at 0 C by radiation doses within the range of 1.5 to 3.0 kGy. The results of the present studies are similar to those obtained previously with sterile mechanically deboned chicken meat.

• OSTI ID: 5263333
• Journal Information: Poultry Science; (United States), Vol. 70:4; ISSN 0032-5791
• Country of Publication: United States
• Language: English

Related Subjects

60 APPLIED LIFE SCIENCES
CHICKENS
RADIOPRESERVATION
SALMONELLA TYPHIMURIUM
SURVIVAL TIME
EQUATIONS
FORECASTING
GAMMA RADIATION
RADIATION DOSES
TEMPERATURE DEPENDENCE
VIABILITY
ANIMALS
BACTERIA
BIRDS
DOSES
ELECTROMAGNETIC RADIATION
FOWL
IONIZING RADIATIONS
IRRADIATION
MICROORGANISMS
PRESERVATION
RADIATIONS
SALMONELLA
VERTEBRATES
553004* - Agriculture & Food Technology- Food Protection & Preservation- (1987-)