What are the characteristics of bacterial colonies?
bacteriacellIn solidmediumThe cells that form on the surface are called colonies (cOlony). Different microorganisms grow and multiply on a certain medium, and the colony characteristics formed are very different, while the same bacteria have certain stability in culture characteristics under certain conditions. This can distinguish and identify different microorganisms. Therefore, the observation of microbial culture characteristics is also an important content in microbial inspection and identification.
The characteristics of bacterial colonies should include: colony size, morphology, color, gloss, transparency, texture, raised state, edge characteristics, etc. Common description terms are as follows:
Size:bacteriaThe extent of colony coverage is generally described as the diameter of the colony.
Morphology: refers to the appearance and shape of the colony. Common words include circle, oval, triangle, and irregular shape.
Color: including both front and back colors, that is, air mycelium and basal mycelium colors. Common vocabulary includes: white, milky white, red, pink, black, colorless, etc.
Gloss: refers to whether the surface is shiny or not, which can be directly described as shiny, dull, smooth, rough, etc. on the surface of the colony. Generally, the surface of the colony with capsules is shiny, and the surface of the colony without capsules is dull.
Transparency: Describes the nature of colony light transmission, commonly used terms include: transparent, translucent, and opaque.
Texture: refers to the viscosity and brittleness of the colony, etc. Common words include: waxy, dry, easy to pick up, sticky, etc.
Uplift state: refers to the morphology of the colony section, and common terms include: bulge, bulge, flattening, etc.
Edge features: refers to the shape of the surrounding colony, commonly used words include: wavy, complete, powdery, rodent, etc.
