Journal ArticleDOI
Molecular and morphological characterization of myxozoan actinospore types from a commercial catfish pond in the Mississippi delta.
Thomas G. Rosser,Matt J. Griffin,Sylvie M. A. Quiniou,Terrence E. Greenway,Lester H. Khoo,David J. Wise,Linda M. Pote +6 more
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TLDR
The morphological and molecular data generated from this study will assist in the identification of myxospore counterparts for these actinospore stages and aid in the elucidation of unknown myxozoan life cycles in closed production systems.Abstract:
The actinospore diversity of infected Dero digitata was surveyed (May 2011) from a channel catfish (Ictalurus punctatus) production pond in the Mississippi Delta region for the elucidation of unknown myxozoan life cycles. At present, only 2 myxozoan life cycles have been molecularly confirmed in channel catfish, linking the actinospore stage from an aquatic oligochaete (D. digitata) and the myxospore stage from the catfish. In this study D. digitata (n = 2,592) were isolated from oligochaetes collected from the bottom sediment of a channel catfish production pond. After 1 wk of daily observation, a total of 6 genetically different actinospore types were observed. The collective groups were classified as 2 aurantiactinomyxons, 2 helioactinomyxons, 1 raabeia, and 1 triactinomyxon. Overall prevalence of myxozoan infections in the isolated oligochaetes was 4.4%. Actinospores were photographed and measured for morphological characterization. Four previously undescribed actinospore types were identif...read more
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Journal ArticleDOI
Small subunit ribosomal RNA sequence links the myxospore stage of Henneguya mississippiensis n. sp. from channel catfish Ictalurus punctatus to an actinospore released by the benthic oligochaete Dero digitata.
Thomas G. Rosser,Matt J. Griffin,Sylvie M. A. Quiniou,Lester H. Khoo,Terrence E. Greenway,David J. Wise,Linda M. Pote +6 more
TL;DR: The sequence similarity between the myxospores from channel catfish and actinospore from D. digitata suggests that they are conspecific, representing alternate life stages of Henneguya mississippiensis n.
Journal ArticleDOI
18S rRNA gene sequencing identifies a novel species of Henneguya parasitizing the gills of the channel catfish (Ictaluridae)
TL;DR: Based on the unique combination of pseudocyst and myxospore morphology, tissue location, host, and SSU rRNA gene sequence data, this isolate is reported to be a previously unreported species, Henneguya bulbosus sp.
Book ChapterDOI
Annelid-Myxosporean Interactions
TL;DR: This chapter provides an overview of the diversity of annelids parasitized by myxosporeans in both marine and freshwater systems and reviews the interactions between myxposoreans and their annelid hosts during the so-called actinospore phase of the myXosporean life cycle.
Journal ArticleDOI
Arrested Development of Henneguya ictaluri (Cnidaria: Myxobolidae) in ♀ Channel Catfish × ♂ Blue Catfish Hybrids.
Thomas G. Rosser,Lester H. Khoo,David J. Wise,Charles C. Mischke,Terrence E. Greenway,Neely R. Alberson,Stephen R. Reichley,Ethan T. Woodyard,James Steadman,Cynthia Ware,Linda M. Pote,Matt J. Griffin +11 more
TL;DR: Culture of hybrid catfish may be an effective management strategy to minimize the burden of PGD in farm-raised Channel Catfish and their hybrids.
Journal ArticleDOI
Pathologic Changes Associated With Respiratory Compromise And Morbidity Due To Massive Interlamellar Henneguya Exilis Infection In Channel × Blue Hybrid Catfish
TL;DR: This work characterizes lesions and confirms the etiology of gill disease induced by the myxozoan H. exilis in channel catfish and hybrid catfish hybrids, suggesting impaired gill function.
References
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Journal ArticleDOI
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