Posthodiplostomum(redirected from Posthodiplostomum minimum)
a genus of flukes (digenetic trematodes) in the family Diplostomatidae.
the adults are found in the intestine of herons and kingfishers, but it is the second intermediate stage, the metacercariae, which occur in the skin, fin, cornea and superficial muscles of fish that are pathogenic. They cause black spot disease of cyprinid fish, especially carp, and may cause some deaths.
the metacercaria cause 1 mm diameter white cysts in most internal organs of many freshwater fish. Called also white grub. Herons are the definitive host.