| Parasite | Microsporidium sp. |
|---|---|
| Taxonomy | Microspora, Microsporea |
| Host | Japanese flounder (Paralichthys olivaceus) |
| Infection site | Liver |
| Clinical sign | White cysts are observed in the liver. |
| Parasitology | Many spores (average length 3.5 mm; average width 2.0 mm) were produced inside the cysts (Fig. 1). It was not confirmed whehter the sporophorocyst is developed. |
| Pathology | No report |
| Health hazard | Since this parasite is not infectious to human, it is harmless in food hygiene. |
| Diagnosis | Check the spores by the wet-mount of cysts. The sample should be smeared and stained by Uvitex 2B followed by a fluorescent microscopic observation. The stained spores emit blue fluorescence under UV radiation. |
Fig. 1. Fresh spores of Microsporidium sp. from the liver of
Japanese flounder.
