2011/06/01 by Szilvia Marton, Edit Eszterbauer · 1 citation
Biochemistry, Genetics and Molecular Biology · Immunology and Microbiology · #Aquaculture disease management and microbiota #Microbial infections and disease research #Myxozoan Parasites in Aquatic Species
paper · pdf · doi:10.14411/fp.2011.015
crossref issued 2011/06/01 · crossref published 2011/06/01 · crossref published-print 2011/06/01 · openalex publication_date 2011/06/01 · crossref created 2014/01/10 · openalex created_date 2025/10/10 · crossref deposited 2026/05/22 · openalex updated_date 2026/06/26 · crossref indexed 2026/08/01
Echinactinomyxon-type actinospores were found in a mixed-species oligochaete culture originating from the Temperate Water Fish Hatchery near Budapest, Hungary. On the basis of DNA sequence analysis, the actinospores were identified as Myxobolus pavlovskii (Akhmerov, 1954), the 18S rDNA sequence from myxospores of which is available in GenBank. Silver carp Hypophthalmichthys molitrix (Valenciennes) fry specimens were successfully infected by cohabitation with the echinactinomyxon-releasing oligochaetes, which confirmed the molecular data congruence. The echinactinomyxons and the myxospores that developed in the gills of exposed fish fry were analysed morphologically and on DNA basis. The infected gill tissue was examined histologically. As typical characters of M. pavlovskii, numerous small plasmodia were observed in the epithelia of gill lamellae. Plasmodia contained thousands of myxospores with polar capsules unequal in size and witl; large intercapsular processes. The 18S rDNA sequence from actinospores and those from myxospores originating from the experimentally infected fish were identical. The oligochaete species releasing actinospores was morphologically determined as Limnodrilus sp. This is the first record of an echinactinomyxon as an alternate stage within the genus Myxobolus.