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501
Clupea harengus
Herring, Atlantic
Ichthyophoniosis
Visceral organs
Ichthyophonus sp.
Ichthyophonus sp.
Herring populations in the N. Sea are affected at approx. 1% prevelance. Very rare (6/93) in southern N. Sea. Mortalities have been recorded on Norwegian and Swedish coasts.
Sporulating bodies in the hearts. All visceral organs affected. Necrosis of tissues.
Not recorded
NORTH SEA
UK
T. Watson
1/6/1993