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A new species of Henneguya (myxozoa) in the big-eyed scad (Selar crumenophthalmus) from Hawaii

January 1, 2008

We describe a new myxozoan, Henneguya akule n. sp., infecting the carangid fish Selar crumenophthalmus in Hawaii. Spores were found only in the aortic bulb, characterized by elliptical capsule with 2 tails, and pyriform polar capsules that angled toward the anterior end of the spore. Polar filaments had 3–4 coils. Parasites were present in apparently healthy fishes and caused no evident gross pathology. On microscopy, parasites evinced a mild inflammatory response in the host characterized by accumulations of eosinophilic fibrillar material around spores and a mononuclear infiltrate in the adventitia of the bulbus arteriosus. Overall prevalence was 20%, and prevalence between 2001 and 2006 ranged from 12 to 27%, but did not differ significantly between years. In contrast, prevalence of infection was highest in south-central Oahu. There was no relationship between infection status and body condition or gender of fish, and infection was absent in the smallest and largest fishes. Phylogenetically, H. akule n. sp. is most closely related to other Henneguya species infecting the heart of marine fishes based on ribosomal DNA analysis. This is the first documentation of a myxozoan parasite in marine fishes from Hawaii.

Publication Year 2008
Title A new species of Henneguya (myxozoa) in the big-eyed scad (Selar crumenophthalmus) from Hawaii
DOI 10.1645/GE-1385.1
Authors Thierry M. Work, Geraldine Takata, Christopher M. Whipps, Michael L. Kent
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Parasitology
Index ID 70032047
Record Source USGS Publications Warehouse
USGS Organization National Wildlife Health Center