Thames Hudson T, Fancher Courtney A, Colvin Mary G, McAnally Mika, Tucker Emily, Zhang Li, Kiess Aaron S, Dinh Thu T N, Sukumaran Anuraj T
Department of Poultry Science, Mississippi State University, Mississippi State, MS 39762, USA.
Animals (Basel). 2022 Jun 2;12(11):1439. doi: 10.3390/ani12111439.
In poultry processing, spoilage microbes are persistent microorganisms, which affect the quality of broiler meat. Peracetic acid (PAA) is the most common antimicrobial used by commercial processing plants, which can reduce the prevalence of these microbes. The goal of this study was to determine the concentrations of aerobic bacteria, coliforms, lactic acid bacteria, and Pseudomonas on broiler meat in processing plants that use peracetic acid in various concentrations as the primary antimicrobial. Samples were collected from three processing plants at five processing steps: post-pick (defeathering), pre-chill, post-chill, mechanically deboned meat (MDM), and drumsticks. Samples were rinsed in buffered peptone water for bacteria isolation. Over six log CFU/sample of aerobic plate counts (APC), lactic acid bacteria, and coliforms were detected on post-pick samples. All spoilage bacteria were reduced to nondetectable levels on post-chill samples (p < 0.001). However, the presence of all bacteria on mechanically deboned meat (MDM) samples indicated varying degrees of cross contamination from post-chill and MDM samples. These results suggest PAA effectively reduces spoilage microbes in chilling applications irrespective of differences in PAA concentrations. However, due to the levels of spoilage microbes detected in MDM, it may be worth investigating the potential interventions for this stage of processing.
在禽肉加工过程中，腐败微生物是持久性微生物，会影响肉鸡的肉质。过氧乙酸（PAA）是商业加工厂最常用的抗菌剂，它可以降低这些微生物的流行率。本研究的目的是确定在以不同浓度过氧乙酸作为主要抗菌剂的加工厂中，肉鸡胴体上需氧菌、大肠菌群、乳酸菌和假单胞菌的浓度。在五个加工步骤从三个加工厂采集样本：宰后（脱毛）、预冷、后冷、机械去骨肉（MDM）和鸡腿。将样本在缓冲蛋白胨水中冲洗以分离细菌。在宰后样本上检测到超过6 log CFU/样本的需氧平板计数（APC）、乳酸菌和大肠菌群。在后冷样本上，所有腐败细菌均降至检测不到的水平（p < 0.001）。然而，机械去骨肉（MDM）样本上所有细菌的存在表明后冷和MDM样本存在不同程度的交叉污染。这些结果表明，无论PAA浓度如何差异，PAA在冷却应用中均能有效减少腐败微生物。然而，由于在MDM中检测到的腐败微生物水平，可能值得研究该加工阶段的潜在干预措施。
