Necroulcerative dermatitis associated with Myxobolus dermatoulcerans n. sp. (Cnidaria: Myxobolidae) in red-bellied piran
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Necroulcerative dermatitis associated with Myxobolus dermatoulcerans n. sp. (Cnidaria: Myxobolidae) in redbellied piranha, Pygocentrus nattereri Kner (Characiformes: Serrasalmidae), from Peru Justin M. Stilwell . Natalie K. Stilwell . Alvin C. Camus . Cyndi Ware . Thomas G. Rosser . Matt J. Griffin
Received: 5 March 2020 / Accepted: 30 July 2020 Ó Springer Nature B.V. 2020
Abstract A group of red-bellied piranha, Pygocentrus nattereri Kner, recently imported from Peru exhibited multifocal, cutaneous ulcerations with exposure of the underlying musculature. Skin scrapes yielded moderate numbers of myxospores morphologically consistent with Myxobolus Bu¨tschli, 1882. Myxospores from these fish were morphologically and molecularly distinct from other myxobolids infecting piranha. Myxospores are pyriform to capsular with a rounded posterior and slightly rounded to tapering This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as urn:lsid:zoobank.org:pub: A2C18A51-A86C-44E3-90D8-7CAEC5611772. This article was published as an Online First article on the online publication date shown on this page. The article should be cited by using the doi number. This is the Version of Record. J. M. Stilwell (&) A. C. Camus Department of Pathology, University of Georgia, Athens, Georgia 30602, USA e-mail: [email protected]
anterior aspect in valvular view. Myxospore bodies are 14.3–17.8 (mean 16.1) lm long and 7.6–10.3 (mean 8.9) lm wide. Polar capsules are symmetrical, slender, elongate, and measure 7.4–10.2 (mean 9.2) lm long and 2.1–3.7 (mean 3.0) lm wide. Sequence generated for the 18S rRNA gene had no direct matches to any sequence available on GenBank but demonstrated less than 89% nucleotide similarity to various published and unpublished Myxobolus spp. from Piaractus brachypomus (Cuvier) and Colossoma macropomum (Cuvier). This paper provides the morphological and molecular characterisation of Myxobolus dermatoulcerans n. sp. from red-bellied piranha and describes associated pathological lesions.
T. G. Rosser Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762, USA
N. K. Stilwell Southeastern Cooperative Wildlife Disease Study, Department of Population Health, University of Georgia, Athens, Georgia 30602, USA C. Ware M. J. Griffin Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762, USA
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Introduction
Materials and methods
The red-bellied piranha, Pygocentrus nattereri Kner, is a freshwater, schooling fish native to Neotropical South America widely known for their aggressive behavior and feeding habits (Sazima & Machado, 1990). Although piranhas are a local food source, they are also highly popular in the global ornamental fish trade and are frequently displayed in public and hobbyist aquariums, occasionally resulting in introduction into non-n
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