Effekt verschiedener chemischer Dekontaminationsmittel auf die Campylobacter-Belastung

A study was conducted to compare the efficacy of different chemical decontamination methods on the Campylobacter jejuni count of experimentally inoculated poultry carcasses. After inoculation, carcasses were spray washed and dipped with sodium chlorite, lactic acid solutions and citric acid solutions at different concentrations (10 and 15% for lactic acid and citric acid; 0.2 and 0.4% for NaClO2), at different temperatures (10 and 30 degrees C) for different time periods (15 to 30 s). Skin samples were removed after treatment and the number of Campylobacter jejuni was established. The inoculation level of C. jejuni was on the average 5.83 log(10) cfu/g. The highest reductions occurred after dipping in lactic acid solutions (15% for 30 s) and dipping in citric acid solutions (15% for 30 s), resulting in cell counts of 4.32 and 4.59 log(10) cfu/g respectively. Dipping in sodium chlorite (0.4% at 30 degrees C for 15 s) diminished the cell count on the average to 4.42 log(10) cfu/g. Under the experimental conditions applied in that study, dipping was more effective than spray washing. With respect to spray washing, citric acid spraying appeared to be significantly more effective than lactic acid spraying or NaClO2-solution spraying