<prompt> The following diagnostic tests are useful for corresponding purposes except -Ziehl - Neelsen staining - Detection of mycobacteriaImmunofluorescence - Detection of Influenza virusSpecific IgM antibodies - Immunity against RubellaSpecific IgM antibodies - Detection of acute infection  <response>: For any infection including rubella IgM antibody alone, without IgG means current acute infection.Ziehl Neelsen staining is used for mycobacteria.Rapid diagnosis of influenza is made by demonstration of viral antigen in specimens by Immunofluorescence. 