Abstract
Study of an outbreak of proliferative gill disease in channel catfish Ictalurus punctatus resulted in the detection of triactinomyxid myxozoans in the ponds. Triactinomyxid myxozoan spores were observed in the water above mud samples from ponds that had channel catfish affected with proliferative gill disease. These spores also were found in the gut wall of an oligochaete, Dero digitata, collected from the pond mud. The triactinomyxid myxozoan spores are those of an unidentified species of Aurantiactinomyxon. Dero digitata was present in all ponds with proliferative gill disease on the study farm in 1989. Further studies of a possible relationship between the myxozoan in D. digitata and proliferative gill disease in channel catfish are underway.
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