Viruses can be used to identify bacteria because of viral specificity for a host cell.This identification method is called:

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Phage typing involves using viruses (bacteriophages) to identify bacterial species or strains based on their susceptibility to particular phages. This method takes advantage of the high specificity of phages for their host bacteria, and can provide valuable information for epidemiological and clinical purposes. The other choices, ELISA, immunochromatography, and probing, are also useful techniques in various contexts, but they are not specifically related to virus-based bacterial identification.

Viruses Can Be Used to Identify Bacteria Because of Viral