TitleA field evaluation of an indirect immunofluorescent antibody test developed to diagnose plasmacytoid leukemia in chinook salmon (Oncorhynchus tshawytscha).
Publication TypeJournal Article
Year of Publication1999
AuthorsSaksida, SM, Thorburn, MA, Speare, DJ, Markham, RJ, Kent, ML
JournalCan J Vet Res
Date Published1999 Apr
KeywordsAnimals, British Columbia, Fish Diseases, Fluorescent Antibody Technique, Indirect, Leukemia, Plasma Cell, Oncorhynchus, Reproducibility of Results, Seawater, Sensitivity and Specificity

An immunofluorescent antibody test (IFAT) developed for the diagnosis for plasmacytoid leukemia was evaluated against histology under field conditions. Previously published results from a laboratory evaluation indicated that the IFAT had a much higher sensitivity than did histology. One hundred seventy-seven moribund chinook salmon from 3 farms located in British Columbia were sampled. Sensitivity, specificity and their respective quality indices were estimated for the IFAT relative to histology. The IFAT was shown to be unreliable, particularly with respect to sensitivity. Cohen's kappa was also calculated and revealed that the agreement between the 2 tests was no better than random. In contrast to previously published results the IFAT did not perform better than histology in the presence of bacterial kidney disease. The results emphasize the importance of evaluating tests in the field conditions in which they are to be used. The possible reasons for the shortcomings of the IFAT are discussed.

Alternate JournalCan J Vet Res
PubMed ID10369567
PubMed Central IDPMC1189528