Iacona V A, Simonetta A, Basílico J C
Cátedra de Microbiología General, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina.
Rev Argent Microbiol. 1987 Oct-Dec;19(4):148-52.
Bacillus cereus incidence on dehydrated powdered foods on sale in supermarkets of Santa Fe city was studied. Two hundred and fifty samples of five different foods: desserts, soups, mousses, pre-cooked "polenta" and mashed potatoes, were examined. Toxinogenic activity of strains confirmed as B. cereus by means of the test of lethality in rats, was analyzed. The ratio between contaminated samples and total analyzed samples was always greater than 6% (Table 1). Besides, none of the analyzed foods exceeded acceptability maximum limit (10(5) UFC/g), established by I.C.M.S.F. (Table 2). It was checked in all cases that no simple lineal correlation existed between B. cereus and total aerobic bacteria enumerations. On the other hand, the percentage of strains with lethal effects was in all cases greater than 42.8% (Table 3).
对圣菲市超市销售的脱水粉末状食品中蜡样芽孢杆菌的发生率进行了研究。对五种不同食品的250个样本进行了检测，这些食品包括甜点、汤、慕斯、预煮“玉米粥”和土豆泥。通过大鼠致死试验确认为蜡样芽孢杆菌的菌株的产毒活性进行了分析。污染样本与总分析样本的比例始终大于6%（表1）。此外，所有分析的食品均未超过国际食品微生物标准委员会（ICMSF）规定的可接受最大限量（10⁵CFU/g）（表2）。在所有情况下均检查发现，蜡样芽孢杆菌与需氧细菌总数之间不存在简单的线性相关性。另一方面，所有情况下具有致死作用的菌株百分比均大于42.8%（表3）。
