<prompt> Elek test is used for detecting toxins of the following infection:InfluenzaDiphtheriaBrucellosisCholera  <response>: Elek gel precipitation test is used for detection of Diphtheria toxin. A presumptive C diphtheriae isolate should be subjected to testing for toxigenicity. Such tests are performed only in reference public health laboratories. There are several methods, as follows: The modified Elek method described by the World Health Organization Diphtheria Reference Unit Polymerase chain reaction PCR-based methods Enzyme-linked immunosorbent assays Immunochromographic strip assay Ref: Brooks G.F. 2013. Chapter 12. Aerobic Non-Spore-Forming Gram-Positive Bacilli: Corynebacterium, Listeria, Erysipelothrix, Actinomycetes, and Related Pathogens. In G.F. Brooks Ed, Jawetz, Melnick, Adelbergs Medical Microbiology, 26e. 