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Observation of hemolysis is useful in the presumptive identification of bacteria, [1]: 165–6 especially streptococci, which are classified on the basis of their hemolytic reactions. [ 11 ] : 92 For example, Streptococcus pyogenes , which causes strep throat and scarlet fever , [ 12 ] displays beta-hemolysis, while Streptococcus pneumoniae ...
Spiral bacteria are another major bacterial cell morphology. [2] [30] [31] [32] Spiral bacteria can be sub-classified as spirilla, spirochetes, or vibrios based on the number of twists per cell, cell thickness, cell flexibility, and motility. [33] Bacteria are known to evolve specific traits to survive in their ideal environment. [34]
The existing diversity of the microbial world is not unraveled completely yet, although we know that it is mainly composed by bacteria, fungi and unicellular eukaryotes. [4] Taxonomic identification of microbial eukaryotes requires exceedingly skillful expertise and is often difficult due to small sizes of the organisms, fragmented individuals ...
Ribotyping is a molecular technique for bacterial identification and characterization that uses information from rRNA-based phylogenetic analyses. [1] It is a rapid and specific method widely used in clinical diagnostics and analysis of microbial communities in food, water, and beverages.
This method, which is commonly used with Mueller–Hinton agar, is used by evenly seeding bacteria over a petri dish and applying an antibiotic treated disk to the top of the agar. By observing the ring formed around the disk formed due to the lack of bacterial growth, the zone of inhibition can be found, which is used to find the ...
A culture of bacteria infected by bacteriophages, the "holes" are areas where the bacteria have been killed by the virus. The culture is 10cm in diameter. Phage typing is a phenotypic method that uses bacteriophages ("phages" for short) for detecting and identifying single strains of bacteria . [ 1 ]
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The identification of bacteria in the laboratory is particularly relevant in medicine, where the correct treatment is determined by the bacterial species causing an infection. Consequently, the need to identify human pathogens was a major impetus for the development of techniques to identify bacteria. [175]