Publication Abstract

Induction of proliferative kidney disease (PKD) in rainbow trout (Onchorhynchus mykiss) Richardson (Teleostei: Salmonidae) via the bryozoan Fredericella sultana (Blumenbach, 1779) (Bryozoa: Phylactolaemata), infected with Tetracapsula bryosalmonae Canning

Induction of proliferative kidney disease (PKD) in rainbow trout (Onchorhynchus mykiss) Richardson (Teleostei: Salmonidae) via the bryozoan Fredericella sultana (Blumenbach, 1779) (Bryozoa: Phylactolaemata), infected with Tetracapsula bryosalmonae Canning et al., 1999 (Myxozoa)

Stephen W. Feist, Matt Longshaw, Beth Okamura and Elizabeth U. Canning

Proliferative kidney disease is a serious pathogen of wild and farmed salmonids, affecting mainly the kidney and spleen but becoming systemic in most susceptible fish hosts. Transmission of Tetracapsula bryosalmonae spores from naturally infected bryozoans Fredericella sultana to naïve rainbow trout was successful by short term exposure to disrupted bryozoans and T. bryosalmonae spores and by long term cohabitation with infected bryozoans. Successful infection was confirmed by kidney imprints, by detection of the parasite in tissue sections, by PCR using T. bryosalmonae specific primers and subsequent sequencing of the amplified 18S rDNA. T. bryosalmonae did not appear to be transmitted nor was PKD induced in fish challenged by intraperitoneal injection of isolated spores.

Reference:

Stephen W. Feist, Matt Longshaw, Beth Okamura and Elizabeth U. Canning, 2001. Induction of proliferative kidney disease (PKD) in rainbow trout (Onchorhynchus mykiss) Richardson (Teleostei: Salmonidae) via the bryozoan Fredericella sultana (Blumenbach, 1779) (Bryozoa: Phylactolaemata), infected with Tetracapsula bryosalmonae Canning et al., 1999 (Myxozoa). Diseases of Aquatic Organisms, 45(1): 61-68

S.W. Feist*, M. Longshaw*, B. Okamura and E.U. Canning

Diseases of Aquatic Organisms, 45(1): 61-68