Microbial strain morphology mainly contains colony morphology and cell morphology. Characteristics of colonies formed by microorganisms cultured under certain conditions, such as surface, size, color, edge, texture, shape, exudate, soluble pigment, etc., have certain stability, and are an important basis for measuring the purity of strains and identifying strains. Colony morphology observation refers to the observation and scientific description of the colony characteristics formed by the bacterial strain under suitable culture conditions.

The cell morphological characteristics of bacteria, including the shape, size, arrangement and sporulation structure, are important reference indexes for the identification of bacteria.Cell morphology observation refers to the observation and description of the morphology, size, arrangement, special structure and surface characteristics of the bacterial strains under suitable culture conditions by means of a microscope. Common morphological observation methods include Gram staining (Bacteria), bacillus staining (Bacillus), insertion method (Actinomycetes), water-immersed slices (fungi), etc.The fine structure of bacteria can also be observed by scanning electron microscopy and transmission electron microscopy.

Bacterial morphology

Actinomycetes morphology

Morphology of filamentous fungi

Yeast morphology