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Examining colonial morphology is the first step in the identification of an unknown microbe. The systematic assessment of the colonies' appearance, focusing on aspects like size, shape, colour, opacity, and consistency, provides clues to the identity of the organism, allowing microbiologists to select appropriate tests to provide a definitive ...
An example of such testing is antibiotic susceptibility testing by measurement of minimum inhibitory concentration which is routinely used in medical microbiology and research. If a suspension used is too heavy or too dilute, an erroneous result (either falsely resistant or falsely susceptible) for any given antimicrobial agent could occur.
The various species can be differentiated through the comparison of several characteristics, allowing their identification and classification. Examples include: Phylogeny : All bacteria stem from a common ancestor and diversified since, and consequently possess different levels of evolutionary relatedness (see Bacterial phyla and Timeline of ...
Runyon II organisms (scotochromogens) are slow-growing and produce a yellow-orange pigment regardless of whether they are grown in the dark or the light.The group includes Mycobacterium scrofulaceum and Mycobacterium gordonae, among others.
Bacterial cellular morphologies are the shapes that are characteristic of various types of bacteria and often key to their identification. Their direct examination under a light microscope enables the classification of these bacteria (and archaea ).
Identification is only possible with a microbiological culture.API test strips consist of wells containing dehydrated substrates such as the redox substrates, electrogenic substrates and luminogenic substrates to detect enzymatic activity, usually related to the fermentation of carbohydrate or catabolism of proteins or amino acids by the inoculated organisms.
Bergey's Manual Trust was established in 1936 to sustain the publication of Bergey's Manual of Determinative Bacteriology and supplementary reference works. The Trust also recognizes individuals who have made outstanding contributions to bacterial taxonomy by presentation of the Bergey Award and Bergey Medal, jointly supported by funds from the Trust and from Springer, the publishers of the ...
Gram staining is almost always the first step in the identification of a bacterial group. While Gram staining is a valuable diagnostic tool in both clinical and research settings, not all bacteria can be definitively classified by this technique. This gives rise to gram-variable and gram-indeterminate groups.