Hysterothylacium

Female Hysterothylacium sp. nematode full of eggs.
Hysterothylacium sp. nematode eggs.

Hysterothylacium is one of the most common groups of parastic nematodes in fish worldwide. It can tolerate a wide range of salinity: in the Columbia River, it is present from the estuary almost up to Bonneville Dam. These nematodes have a multi-host life cycles, involving aquatic copepods and fish.

Life Cycle Diagram:
Life cycle of Hysterothylacium sp. (nematode).
Life Cycle Diagram:
Life cycle of the nematode Hysterothylacium sp.
Detection Methods:
gross pathology / gross clinical signs
Target tissue
viscera