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Nocardiosis in tank‐reared Atlantic salmon, Salmo salar L.
Author(s) -
Bransden M P.,
Carson J.,
Munday B L.,
Handlinger J H.,
Carter C G.,
Nowak B F.
Publication year - 2000
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1046/j.1365-2761.2000.00201.x
Subject(s) - salmo , nocardiosis , biology , rainbow trout , nocardia , salvelinus , fishery , zoology , trout , fontinalis , fish <actinopterygii> , bacteria , genetics
Nocardiosis is an infection caused by aerobic Gram‐positive, branching, filamentous rods of the genus Nocardia . The organism is resident in both soil and plants (Austin & Austin 1993; Frerichs 1993), and is closely related to Mycobacterium spp. Nocardiosis caused by Nocardia asteroides and N. seriolae (previously N. kampachi ) has been reported in several finfish species, both freshwater and marine. The first reported incidence was recorded by Valdez & Conroy (1963) in neon tetras, Hyphessobrycon innesi (Myers), and subsequently in other fish species, some of commercial significance including rainbow trout, Oncorhynchus mykiss (Walbaum) (Snieszko, Bullock, Dunbar & Pettijohn 1964), brook trout, Salvelinus fontinalis (Mitchill), (Campbell & MacKelvie 1968) and yellowtail, Seriola quinqueradiata (Temminck & Schlegel; Kubota, Kariya, Nakamura & Kira 1968). Despite two of these incidences occurring in salmonids, infection by Nocardia spp. in Atlantic salmon, Salmo salar L., has not previously been reported.