Chemical dehairing of bovine skin to reduce pathogenic bacteria and bacteria of fecal origin

A chemical dehairing process was applied to artificially contaminated bovine hide to evaluate the effect on populations of Escherichia coli O157:H7 and Salmonella Typhimurium, as well as other strains of E. coli, total coliforms, and aerobic plate counts (APC). Pieces of hide (4 cm2) were contaminat...

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Bibliographic Details
Published in:Journal of food protection 1998-05, Vol.61 (5), p.623-625
Main Authors: Castillo, A. (Texas AandM University, College Station, TX.), Dickson, J.S, Clayton, R.P, Lucia, L.M, Acuff, G.R
Format: Article
Language:English
Subjects:
Animals
Antibiotics, Antitubercular - pharmacology
Biological and medical sciences
BIOLOGICAL CONTAMINATION
BOVIN
CANAL ANIMAL
CARCASSE
CARCASSES
CATTLE
CONTAMINACION BIOLOGICA
CONTAMINATION BIOLOGIQUE
CUEROS Y PIELES
CUIRS ET PEAUX
DESINTOXICACION
DETOXIFICATION
Drug Resistance, Microbial
ESCHERICHIA COLI
Escherichia coli - isolation & purification
Feces - microbiology
Food industries
FOOD SAFETY
Fundamental and applied biological sciences. Psychology
GANADO BOVINO
Hair Removal - methods
HIDES AND SKINS
INNOCUITE DES PRODUITS ALIMENTAIRES
INOCUIDAD ALIMENTARIA
Meat and meat product industries
MICROBIAL CONTAMINATION
Rifampin - pharmacology
SALMONELLA TYPHIMURIUM
Salmonella typhimurium - isolation & purification
Skin - microbiology
Sulfides - pharmacology
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Summary:A chemical dehairing process was applied to artificially contaminated bovine hide to evaluate the effect on populations of Escherichia coli O157:H7 and Salmonella Typhimurium, as well as other strains of E. coli, total coliforms, and aerobic plate counts (APC). Pieces of hide (4 cm2) were contaminated with bovine feces inoculated with both rifampicin-resistant E. coli O157:H7 and S. Typhimurium to yield a final count of each pathogen of ca. 5.0 log(10) CFU/cm2, or with noninoculated feces which produced an approximate final APC of 6.0 log(10) CFU/cm2 and a coliform and E. coli count of 5.0 log(10) CFU/cm2. Counts of pathogens, APC, coliforms, and E. coli were conducted before and after applying the dehairing treatment. S. Typhimurium and E. coli O157:H7 populations were significantly reduced from initial numbers (5.1 to 5.3 log(10) CFU/cm2) to levels below the detection limit of 0.5 log(10) CFU/cm2 after chemical dehairing. APC, coliforms, and E. coli counts were also reduced significantly after dehairing, with reductions of 3.4 for APC, 3.9 for coliforms, and 4.3 log(10) CFU/cm2 for other E. coli strains. Since the hide is a major source of fecal contamination of beef carcass surfaces, chemical dehairing may be beneficial in reducing overall contamination of carcasses
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X-61.5.623