帕金虫滋养体主要寄生在菲律宾蛤仔结缔组织中，在鳃、外套膜、消化腺中较多，在闭壳肌、水管中较少；
Perkinsus trophozoites predominantly focused in the clam connective tissue, and frequently found in gill, mantle and digested gland, less in adductor muscle and efferent siphon, no found in podium.
该吸虫主要侵占生殖腺，少部分幼虫进入附近的消化盲囊、鳃、肾等部位。
Histological examination reveals that most larvae occupied the gonad of the clam, relatively fewer appeared in other organs, such as the digestive diverticulum, gills, kidney etc.
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