Theses and Dissertations

Title: The immune response of channel catfish, Ictalurus punctatus (Rafinesque), to Ichthyophthirius multifiliis

Name: Areerat, Sopa

Degree: MS

Chair: Dr. Ray Allison

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1974

Pages: 47

Keywords: Immune Response,Channel Catfish,Ichthyophthirius multifiliis.


In February, 1973, an experiment was initiated to induce an immune response in channel catfish, Ictalurus punctatus, to Ichthyophthirius multifiliis. The investigations were carried out in a laboratory of the Fisheries Annex, Department of Fisheries and Allied Aquacultures, Auburn University. Two methods of inducing immune response were used. One group of fish was exposed to 0, 20 and 40 trophozoites per fish and the other group was injected with 0.5 cc of an antigen prepared from trophozoites of Ichthyophthirius with and without adjuvant. Twenty-one days after exposure, sera from experimental fish were obtained for agglutination studies. All treated fish had agglutinins except the control fish.All experimental fish were challenged with 20 trophozoites per fish. Seven days after exposure, all control fish developed ichthyophthiriasis and died. The fish that had been exposed to 20 trophozoites per fish had 6.6 percent mortality. The fish that had been exposed to 40 trophozoites per fish had no mortality. All fish that had been injected with antigen prepared from cells of Ichthyophthirius had no mortality.

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