Related Experiment Video
Updated: Jan 20, 2026

Analysis of Yersinia enterocolitica Effector Translocation into Host Cells Using Beta-lactamase Effector Fusions
Published on: October 13, 2015
Inactivation of Yersinia enterocolitica and Brochothrix thermosphacta on pork by UV-C irradiation
Julia Reichel1, Corinna Kehrenberg2, Carsten Krischek1
1Foundation University of Veterinary Medicine Hannover, Institute of Food Quality and Food Safety, Bischofsholer Damm 15, 30173 Hannover, Germany.
Abstract:
Ultraviolet (UV) irradiation has gained interest as a decontamination method for food for several years. This study investigated how UV-C affected the microbial load of pork, inoculated with Yersinia (Y.) enterocolitica and Brochothrix (B.) thermosphacta. The initial effect as well as the effect after 1, 7 and 14 days of storage were investigated. Additionally, the meat quality parameters color, pH value, myoglobin redox form percentages and antioxidant capacity were analyzed. During storage, the bacterial load on pork was significantly reduced up to 1.2 log10 using doses of 408 or 2040 mJ/cm2. In contrast to this, in vitro experiments with bacterial suspensions showed that calculated UV doses of 16.16 and 19.30 mJ/cm2 resulted in a 3.0 log10 reduction of Y. enterocolitica and B. thermosphacta, respectively. The analyzed meat quality parameters were not influenced by UV-C treatment. Hence, UV-C light can reduce microbial surface contamination without negatively affecting meat quality.
Related Concept Videos
X-Inactivation
Activation and Inactivation of G Proteins
UV–Vis Spectrum
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...
UV–Vis Spectrometers
IR and UV–Vis Spectroscopy of Aldehydes and Ketones
IR and UV–Vis Spectroscopy of Carboxylic Acids
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency,...

