| 摘要 |
<p>This invention relates to a method for selecting a cheese starter culture resistant to bacteriophage present in a cheese factory, and to apparatus for use in the method. <??>To test and thereby select a blend of strains not susceptible to the current bacteriophage in the cheesemaking plant the cheesemaker inoculates each of a multiplicity of receptacles (12) with an inoculant containing phage then present in the cheese factory. A suitable inoculant is filtered whey obtained from current production. Each receptacle (12) contains a genetically distinct starter culture strain or a culture blend in a sterile milk medium and contains a dye which will change colour in the desired pH range. After incubation for a period of, for example, ten hours the cultures resistant to the prevailing phage will exhibit the desired colour change and will have developed a firm curd. A starter culture known to be resistant to the prevailing phage can now be selected. </p> |
