The primary difference is the state in which the nutrient is in. Nutrient broth's tend to be liquid, while agar plates tend to be solid. Although both can be composed of any number of nutrients depending on the wanted bacterial growth, the fact that broths are liquid and agar is solid manifest as different pros and cons when culturing bacteria. For example, agar plated cultures grow as flat cultures, favoring say animal epithelial cells which normally grow on a flat surface to which they attach, while bacteria grown in liquid cultures often form colloidal suspensions.
Description
Nutrient Agar is an inexpensive medium suitable
for the cultivation of all bacteria which are nonexacting
in their growth requirements. It
functions therefore, as a general purpose
medium for the maintenance of stock cultures
and as a useful demonstration and teaching aid.
Adequate salt and agar concentrations permit the
addition of blood, serum or other enriching fluids
where these are required. However for the
successful growth of fastidious organisms, a
medium such as Columbia Agar (DM115), Blood
Agar Base (DM100) or Blood Agar Base Special
(DM101) is to be preferred.
The primary difference is the state in which the nutrient is in. Nutrient broth's tend to be liquid, while agar plates tend to be solid. Although both can be composed of any number of nutrients depending on the wanted bacterial growth, the fact that broths are liquid and agar is solid manifest as different pros and cons when culturing bacteria. For example, agar plated cultures grow as flat cultures, favoring say animal epithelial cells which normally grow on a flat surface to which they attach, while bacteria grown in liquid cultures often form colloidal suspensions.DescriptionNutrient Agar is an inexpensive medium suitablefor the cultivation of all bacteria which are nonexactingin their growth requirements. Itfunctions therefore, as a general purposemedium for the maintenance of stock culturesand as a useful demonstration and teaching aid.Adequate salt and agar concentrations permit theaddition of blood, serum or other enriching fluidswhere these are required. However for thesuccessful growth of fastidious organisms, amedium such as Columbia Agar (DM115), BloodAgar Base (DM100) or Blood Agar Base Special(DM101) is to be preferred.
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