[The use of ionizing radiation for the decontamination of salmonella-containing slaughtered broiler chickens and powdered eggs].
The effect of cobalt-60 gamma irradiation was investigated on the concentration of Salmonella (S.) typhimurium in artificial contaminated chicken carcasses and on the number of S. tennessee and S. agona in artificial contaminated spray-dried whole egg powder and liquid whole egg. Irradiation of carcasses and of liquid whole egg was carried out at deep frozen conditions between -10 degrees C and -18 degrees C and whole egg powder at 15-20 degrees C. The irradiation doses used where between 0.05 and 8.0 KGy. The D10-value of S. typhimurium in broiler chicks ranged between 0.57 and 0.74 and of S. agona respectively S. tennessee amounted to 0.95 and 1.07 in spray dried whole egg powder and 0.47 respectively 0.53 in whole egg content. Irradiation causes drastic reduction of physiological microflora in chicken carcasses. By radiation treatment using a dose of 4.0 KGy, germ count reductions by 3-5 decimal powers were achieved. Resistance of microbes increases in following succession: Pseudomonas spp., Salmonella spp., other Enterobacteriaceae spp., Micrococcus spp., Flavobacterium spp., yeasts, Bacillus spp., Streptomyces spp., fungi. Results of microbiological and sensorial examinations allow following conclusions: 1. Irradiation is highly effective against Salmonella. 2. Irradiation dose of 4.0 KGy is able to kill about 1 Million Salmonella bacteria per chicken. This guarantees safe elimination of natural occurring Salmonella bacteria in broiler chicken carcasses. 3. Irradiation of chicken carcasses up to 4.0 KGy causes no injury of quality, however storage longer than 4 months deteriorates sensorial qualities more than of unirradiated carcasses.(ABSTRACT TRUNCATED AT 250 WORDS)
Köhler
B
B
Hübner
H
H
Krautschick
M
M
D000818:Animals; D001419:Bacteria / Q000528:radiation effects; D002645:Chickens; D004531:Eggs; D005506:Food Contamination; D005514:Food Irradiation; D005720:Gamma Rays; D008460:Meat; D012475:Salmonella / Q000528:radiation effects; D012478:Salmonella Food Poisoning / Q000517:prevention & control*
Die Nutzung ionisierender Strahlen zur Dekontamination von salmonellenhaltigen Broilerschlachtkörpern und Eipulver.