Читать книгу Analytical Food Microbiology - Ahmed E. Yousef - Страница 60

In order to obtain counts that can be compared among different laboratories, it is necessary to establish consistent guidelines for counting colonies. In some circumstances, however, different counting or calculation methods may be used in place of, or in conjunction with, the standard counting rules. The following are the rules that will be applied throughout this book for counting bacterial colonies.

Figure 3.2 Darkfield Quebec colony counter with a Petri plate mounted for colony counting.