TABLE 1



Usually only one type of colony will be seen on the Mannitol salt agar plate. Carefully look at the color, size, and shape of the bacterial colonies, and you should be able to determine the number of different types of bacteria in your sample. Record your results in the table below.

Color and
description of
colonies?
Size (small,
medium, large)
of Colonies?
Source of
colonies?
Number of
Colonies?
Mannitol
fermentation?
Yes or No?
Gram stain:
+ Blue or
- Pink?


Based on these results, is this organism Staphyloccoccus ? If so, which species ( aureus or epidermidis ) is it?

Streak Plates

Figure 1
Streak Plate Illustration