title: Occurrence of two myxosporean species, Myxobolus hakyi sp. n. and Hoferellus pulvinatus sp. n., in Pangasianodon hypophthalmus fry imported from Thailand to Europe as ornamental fish.
abstract: Fingerlings of the sutchi catfish Pangasianodon hypophthalmus, a favorite food fish in South Asia, is regularly imported by European fish traders and sold in pet fish shops. In shipments from Thailand, a skin and a kidney infection of this fish caused by myxosporean parasites was found both in Hungary and Russia. In the skin of the fish, small millet-sized nodules containing great numbers of a Myxobolus species were found, while in the renal glomeruli, spores and sporogonic stages of a Hoferellus species developed. The skin-infecting species described as Myxobolus hakyi sp. n. had 15.9 x 6.6-microm-sized spores with elongated polar capsules, while the renal species described as Hoferellus pulvinatus sp. n. had roundish spores with a size of 6.5 x 5.0 microm and had a characteristic pillow-like structure at its posterior end. Besides morphology, histology of infection and 18S rDNA sequences were studied.
authors.affiliation: Department of Pathology, Faculty of Veterinary Medicine, Szent István University, 1078 Budapest, Hungary.
authors.forename: Ferenc
authors.initials: F
authors.lastname: Baska
authors.forename: V N
authors.initials: VN
authors.lastname: Voronin
authors.forename: Edit
authors.initials: E
authors.lastname: Eszterbauer
authors.forename: Linda
authors.initials: L
authors.lastname: Müller
authors.forename: Szilvia
authors.initials: S
authors.lastname: Marton
authors.forename: Kálmán
authors.initials: K
authors.lastname: Molnár
mesh_terms: D000818:Animals; D002397:Catfishes / Q000469:parasitology*; D016054:DNA, Protozoan / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005060:Europe; D020459:Genes, rRNA; D007668:Kidney / Q000469:parasitology; D008969:Molecular Sequence Data; D055764:Myxozoa / Q000302:isolation & purification*; D033661:Oocysts / Q000166:cytology; D010273:Parasitic Diseases, Animal / Q000469:parasitology*; D016053:RNA, Protozoan / Q000235:genetics; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012867:Skin / Q000469:parasitology; D013785:Thailand
chemical_list: D016054:DNA, Protozoan; D004275:DNA, Ribosomal; D016053:RNA, Protozoan; D012337:RNA, Ribosomal, 18S