| Infection dynamics of Kudoa yasunagai (Myxozoa: Multivalvulida) infecting brain of cultured yellowtail Seriola quinqueradiata in Japan. | |
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MedLine Citation:
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PMID: 23135139 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We monitored infection by a brain-infecting myxozoan Kudoa yasunagai in hatchery-reared juvenile yellowtail Seriola quinqueradiata at a culturing site in Japan. Infection was detected by PCR and microscopic observation once every 1 to 4 wk during 2010 and 2011. In both years, we detected first infection in mid-July by PCR. Prevalence increased rapidly after the onset of infection, peaking at 100% within 4 wk. Parasites required less than 10 d to reach the brain after invasion. Development of plasmodia and formation of cysts took 4 to 8 wk. Infection did not reach a plateau and number of cysts tended to decline over time, suggesting possible recovery from the infection. A drastic decline in infection prevalence was observed during the season of highest water temperature (>30°C) in 2010. To understand this phenomenon, we conducted a laboratory experiment to compare infection prevalence and cyst formation in fish kept at 25°C and 30°C. However, we could not detect obvious differences between the treatment groups during the 4 wk of the experiment. There was no apparent pathology associated with the infection. These results suggest that pathological effects of K. yasunagai may differ between fish species or that other factors are important in the development of infectious signs. |
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Authors:
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Sho Shirakashi; Akinobu Morita; Katsuya Ishimaru; Shigeru Miyashita |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Diseases of aquatic organisms Volume: 101 ISSN: 0177-5103 ISO Abbreviation: Dis. Aquat. Org. Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-08 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8807037 Medline TA: Dis Aquat Organ Country: Germany |
Other Details:
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Languages: eng Pagination: 123-30 Citation Subset: IM |
Affiliation:
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Fisheries Laboratory, Kinki University, Shirahama, Wakayama 649-2211, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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