The indirect india-ink immunoreaction for detection of antibodies to Encephalitozoon cuniculi in rat and mouse serum.

The direct india-ink immunoreaction and the india-ink immunoreaction inhibition tests are described and results are compared with those obtained by the indirect fluorescence antibody test. Titrations of seropositive samples were made by 2 methods and the titres obtained were similar. Some advantages of the india-ink immunoreaction as a diagnostic test are discussed.