Donnelly C W, Baigent G J
Appl Environ Microbiol. 1986 Oct;52(4):689-95. doi: 10.1128/aem.52.4.689-695.1986.
This report describes a method for the detection of Listeria monocytogenes in raw milk by flow cytometric analysis of fluorescently labeled bacterial populations. The use of immunofluorescence in combination with measures of DNA content by propidium iodide labeling and size by light scattering enabled specific identification of L. monocytogenes from Streptococcus faecalis, Streptococcus agalactiae, Streptococcus uberis, Staphylococcus epidermidis, and Staphylococcus hyicus. Additional specific resolution of L. monocytogenes populations was achieved through selective enrichment of raw milk in Listeria enrichment broth. These procedures should permit the rapid screening of milk and other food samples for L. monocytogenes and eliminate many of the short-comings associated with conventional fluorescent-antibody procedures.
本报告描述了一种通过对荧光标记细菌群体进行流式细胞术分析来检测生牛奶中单核细胞增生李斯特菌的方法。将免疫荧光与碘化丙啶标记的DNA含量测量及光散射测量的大小相结合,能够从粪肠球菌、无乳链球菌、乳房链球菌、表皮葡萄球菌和猪葡萄球菌中特异性鉴定单核细胞增生李斯特菌。通过在李斯特菌增菌肉汤中对生牛奶进行选择性增菌,实现了对单核细胞增生李斯特菌群体的进一步特异性分辨。这些程序应能快速筛查牛奶和其他食品样本中的单核细胞增生李斯特菌,并消除许多与传统荧光抗体程序相关的缺点。