McLaughlin, SMFaisal, M2025-06-122025-06-122000-01-01https://scholarworks.wm.edu/handle/internal/18598Prevalence and intensity of Perkinsus spp. infections were determined in soft-shell clams Mya arenaria during 1990 to 1998 based upon incubation of rectal tissues in Ray's fluid thioglycollate medium. During the study, soft-shell clams were collected from 18 sites in the upper Chesapeake Bay in Maryland. Enlarged hypnospores were found in similar to 7% (114/1,705) of the soft-shell clams. Peak prevalences occurred in the fail of 1992 with similar to 53% (16/30) at Piney Point and 50% (15/30) at Eastern Neck, and in August 1995 with similar to 64%(18/28) and similar to 37% (11/30) at Cedar Point and Piney Point, respectively. This investigation provides evidence that Perkinsus spp. infections in soft-shell clams are more common than previously thought.http://creativecommons.org/licenses/by-nc-sa/3.0/Aquatic Health Sciences Peer-Reviewed ArticlesSoft-Shell Clam; Perkinsus Spp.; Chesapeake Bay; Maryland; Infection; Intensityarticle