Molecular evidence that the proliferative kidney disease organism unknown (PKX) is a myxosporean.
نویسندگان
چکیده
The proliferative kidney organism unknown (PKX), a serious salmonid fish pathogen, is considered to be a myxosporean on the basis of ultrastructural studies, but its real taxonomic position has never been confirmed. In order to ascertain its position, genomic DNA was extracted from PKX and small subunit (SSU) ribosomal DNA was amplified by PCR, cloned and sequenced. A phylogenetical analysis on SSU rDNA from 76 or 128 eucaryotic species was carried out. Whatever the tree reconstruction methods used, PKX was found to be a sister group of the Myxozoa phylum, providing the first molecular evidence for its membership in this phylum.
منابع مشابه
NON-SALMONID FISH INHABITING A HATCHERY WATER SUP- PLY ENZOOTIC FOR PROLIFERATIVE KIDNEY DISEASE IN- FECTED WITH ONE MYXOSPOREAN, Myxobilatus SP'P
Proliferative kidney disease (PKD), caused by an unclassified myxosporean (PKX), is a serious disease of salmonids. Although partial spore development occurs to a limited extent in fish infected with PKX, complete sporalation has not been observed and precise taxonomic status of PKX remains uncertain. The severe inflammation seen in infected fish, unusual for most myxosporean infections, sugges...
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ورودعنوان ژورنال:
- Diseases of aquatic organisms
دوره 36 3 شماره
صفحات -
تاریخ انتشار 1999