Henneguya wolinensis n. sp. (Myxosporea) from perch Perca fluviatilis L. from Szczecin Firth, Poland

During parasitological investigations of perch P. fluviatilis L., in spring 1988 from waters of Szczecin Firth, noticed a presence of Henneguya wolinensis n. sp. (Myxosporea: Bivalvulida) cysts on fish skin. Milk-white, oval cysts measured from 0.5 to 1.0 mm occurred under scales, on epidermis of all fish scaled body surface. Dimensions of spore: body length 22.3-27.2 μm, total length 61.1-69.3 μm, breadth 7.4-8.7 μm, polar capsules length 11.1-15.1 μm, polar filaments length 120-160 μm. The new described species compared with H. creplini and H. psorospermica from gills founding on perch together with H. wolinensis n. sp

Parasitic fauna of Atlantic mackerel (Scomber scombrus L.) from the fishing grounds of Cape Hatteras

A study was made of the parasitic fauna of Atlantic mackerel from east shore of the United States. A short characteristic is given of the parasite species found. The results are compared to those presented by other authors

Myxobilatus gasterostei (Parisi, 1912) the myxosporidia species new for Poland

In 1988, for the first time in Poland, presence of the sporozoan Myxobilatus gasterostei (Parisi, 1912) in the stickleback′s (Gasterosteus aculeatus L., 1758) kidney was noted

Henneguya wolinensis n. sp. (Myxosporea) from perch Perca fluviatilis L. from Szczecin Firth, Poland

During parasitological investigations of perch P. fluviatilis L., in spring 1988 from waters of Szczecin Firth, noticed a presence of Henneguya wolinensis n. sp. (Myxosporea: Bivalvulida) cysts on fish skin. Milk-white, oval cysts measured from 0.5 to 1.0 mm occurred under scales, on epidermis of all fish scaled body surface. Dimensions of spore: body length 22.3-27.2 μm, total length 61.1-69.3 μm, breadth 7.4-8.7 μm, polar capsules length 11.1-15.1 μm, polar filaments length 120-160 μm. The new described species compared with H. creplini and H. psorospermica from gills founding on perch together with H. wolinensis n. sp

Alternate spore stages of Myxobilatus gasterostei, a myxosporean parasite of three-spined sticklebacks (Gasterosteus aculeatus) and oligochaetes (Nais communis)

Two spore stages in the life cycle of Myxobilatus gasterostei, a ubiquitous myxosporean parasite of three-spined sticklebacks, were identified by matching small subunit ribosomal RNA gene sequences of actinospores from a worm with myxospores from fish. A Nais communis oligochaete collected in the Willamette River, Oregon, USA was found to produce a triactinomyxon-type actinospore which was distinguishable from previous records by its large size (approximately 500 microm across) and number of germ cells (approximately 500). Its small subunit ribosomal RNA gene sequence was >99% similar to M. gasterostei from Europe. Two of ten sticklebacks from the Willamette had renal infections with Myxobilatus myxospores which were smaller than the type description of M. gasterostei Parisi (1912) but were consistent with subsequent records. Primer Mg1097r was designed to selectively amplify M. gasterostei in the presence of another common kidney myxosporean, Sphaerospora elegans. DNA sequences of spores from the fish were identical to each other and were 99.8% similar over 2,112 nt to the spores from the oligochaete. The 0.2% sequence divergence comprised polymorphisms at five loci, which suggested that multiple alleles were present in the parasite population. This is the first Myxobilatus species shown to have two spore stages in its life cycle and to infect an invertebrate. The infected oligochaete underwent paratomic fission to produce two daughter worms with parasite stages in their intestinal epithelia, which suggested that M. gasterostei may be sustained and dispersed within the invertebrate host population