IBSS NASU. A.Gaevskaya. Kudoa alliaria

Kudoa alliaria

From Kovaljova A.A., Shulman S.S., Yakovlev V.N.
Myxosporidians of the genus Kudoa (Myxosporidia, Multivalvulea) from the Atlantic Ocean bassin.
- in: Systematic and ecology of sporozoans and knydosporidians.
- Trudy Zoologichweskogo Instituta, v.87.- 1979.- P.42-64.

Kudoa alliaria Schulman et Kovaljova nov.sp.

Hosts: Micromesistius australis, Notothenia ramzay, N. conina, Macruronus magellanicus.

Site of infection: muscles.

Locality: the Atlantic Ocean (the Falkland-Patagonian shelf).

Numerous plasmodia contain 1-8 spores. Plasmodia are surrounded with common connective tissue of host, so named a pseudocyst. The pseudocysts white and yellow, spindle-like, measuring 3.5-6.0x0.6-1 mm (from Notothenia) and 10x3-5 mm (from Micromesistius).

Mature spores bulb or garlic-form, with rounded top ends. Posterior end of spore rounded, anterior end slightly rises above in the central part of spore. Polar capsules more or less rounded. Coils of polar filament 3-3.5. Valve nuclei on spore tops.

Spores (from Micromesistius) 7-8 (long) x 8-9 (thick) x 9-10 (wide), polar capsules 2.4 x 1.8, polar filament 9.5-10.6.

Spores (from Notothenia ramsay) 6.3-7.4 (long) x 6-6.3 (thick) x 6.3-7.4 (wide), polar capsules 2.1-2.6 x 2.

The prevalence of M.australis was 70-100%, 1-56 cysts in one fish. The fish 10-24 cm long were not infected.

Pathological changes in host tissue are not revealed.

From Gaevskaya A.V., Kovaljova A.A.
Diseases of food fishes from the Atlantic Ocean.
- Kaliningrad, 1975.

Host: Micromesistius australis.

Locality. The Falkland-Patagonian shelf.

Prevalence of infection was 70-100%, 1-52 pseudocysts per fish.

Fish 10-12 cm long are not infected. Fish more 40 cm long are infected the most intensive.

From Gaevskaya A.V., Kovaljova A.A.
The Handbook on the principal diseases and parasites of food fish from the Atlantic Ocean.
- Kaliningrad, 1991.

Kudoa alliaria from Micromesistius australis.

Cysts cream, yellow or milk-white, elongate, in the sceleton muscle of host. 5-25 x 3-5 mm. The most large cysts has the milk-white colour.

We have observed this parasite beginning 1971 til 1985. Prevalence of infection was 25-100% in dependence upon the fish age and catch region. One fish has 1-65 cysts. Fish less 40 cm long have 1-5 cysts, fish more 40 cm long have 1-65 cysts (67% of fish have 1-5 cysts, 24% - 6-10 cysts, 9% - more 10).

Seasonal and annual infection dynamics are not revealed.

K.alliaria from Macruronus magellanicus

Cysts white, 4-5 x 1.5-2.5 mm.

Prevalence 43%, 2-30 cysts per fish, as a rule 3-5.

K.alliaria from Patagonotothen ramsay (=Notothenia ramsay)

It was found in May 1973. Prevalence 54%. 2-3 cysts per fish.

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