Institute of Food Quality and Food Safety, University of Veterinary Medicine Hanover, Foundation, Bischofsholer Damm 15, D-30173 Hanover, Germany.
Int J Food Microbiol. 2010 Jun 15;140(2-3):214-7. doi: 10.1016/j.ijfoodmicro.2010.03.031. Epub 2010 Mar 27.
From November 2005 to August 2006, microbiological analyses were performed in a processing plant for powdered infant formula (PIF) to estimate the occurrence and dissemination of Cronobacter spp. and the contamination levels of Enterobacteriaceae in the processing environment. In total 867 samples were collected from the dry processing environment including powders from vacuum cleaners and filtering (sieving) machines, fluids from the drains and swabs from contact surfaces. In total 35 samples in 14 out of 35 tested locations were positive for Cronobacter spp. Positive samples were found in environmental powders (94.3%) and two fluids (5.7%). The Cronobacter spp. prevalence was highest in powders from vacuum cleaners with 28.0% positive samples on a single location. While powders from the sensitive agglomeration section or production (sieving) had contamination rates of 10.7% or below 3.4%, respectively. In addition vacuum powder samples from the filling and can filling line were positive with 5.3 and 8.0%, respectively. High levels (>500 cfu/g) of Enterobacteriaceae were found in seven locations out of 21 tested powder locations. This fact emphasizes the importance of monitoring of the processing environment to implement effective measures to improve the safety and hygiene in PIF, a very sensitive product.
从 2005 年 11 月至 2006 年 8 月，在一家婴儿配方粉（PIF）加工厂进行了微生物分析，以评估克罗诺杆菌属（Cronobacter spp.）的发生和传播情况以及加工环境中肠杆菌科的污染水平。共采集了 867 个来自干加工环境的样本，包括来自吸尘器和过滤（筛分）机的粉末、来自排水口的液体以及来自接触表面的拭子。在 35 个测试位置中的 14 个位置共 35 个样本中检测到克罗诺杆菌属呈阳性。在环境粉末（94.3%）和两个液体（5.7%）中发现了阳性样本。在吸尘器的粉末中，克罗诺杆菌属的检出率最高，在一个位置的阳性样本率为 28.0%。而在敏感结块部分或生产（筛分）的粉末中的污染率分别为 10.7%或低于 3.4%。此外，灌装线和罐装线的吸尘器粉末样本的阳性率分别为 5.3%和 8.0%。在 21 个测试粉末位置中有 7 个位置的肠杆菌科含量较高（>500 cfu/g）。这一事实强调了监测加工环境的重要性，以采取有效措施提高婴儿配方粉的安全性和卫生水平，因为婴儿配方粉是一种非常敏感的产品。
