Messier S, Smith H J, Tittiger F
Agriculture Canada, Laboratoire d'hygiène vétérinaire, Saint-Hyacinthe, Québec.
Can J Vet Res. 1989 Jan;53(1):84-6.
Genoa salami prepared using three different salt concentrations (2.0, 2.75 and 3.3%) were inoculated with 2.0 x 10(3) and 1.1 x 10(3) bacteria/g of Salmonella typhimurium and Staphylococcus aureus respectively. Over a period of 74 days samples were taken and analyzed for water activity and pH, counts of S. aureus and presence of Salmonella. After 11 days of dry-curing Salmonella could no longer be detected by preenrichment followed by selective enrichment procedures. Viable S. aureus were still found after 74 days of dry-curing. The results of this study would suggest that water activity and pH measurements are useful in evaluating the safety of dry-cured products.
使用三种不同盐浓度(2.0%、2.75%和3.3%)制备的热那亚萨拉米香肠,分别接种了每克2.0×10³和1.1×10³的鼠伤寒沙门氏菌和金黄色葡萄球菌。在74天的时间里,采集样本并分析其水分活度、pH值、金黄色葡萄球菌计数和沙门氏菌的存在情况。干腌11天后,通过预富集然后选择性富集程序无法再检测到沙门氏菌。干腌74天后仍能发现存活的金黄色葡萄球菌。本研究结果表明,水分活度和pH值测量对于评估干腌产品的安全性很有用。