Pulse granulomas detected in peritoneum of a wild rainbow trout, Oncorhynchus mykiss, with acanthocephalan infections

Abstract

Pulse granulomas (PG) are reactions to particles of food that are characterized by clusters of small to medium-sized hyaline rings. This report describes a case of multiple pulse granulomas, found adhering to the visceral and parietal peritoneum of the abdominal wall of a wild rainbow trout. This was associated with fistulae, involving the gastrointestinal tract, resulting from deep penetration of acanthocephalans into the intestinal wall.