Thelohanellus toyamai (syn. Myxobolus toyamai) infecting the gills of koi Cyprinus carpio in the eastern United States.
J Parasitol
; 97(3): 493-502, 2011 Jun.
Article
en En
| MEDLINE
| ID: mdl-21506862
ABSTRACT
A myxozoan resembling species of Thelohanellus was isolated from the gills of koi (Cyprinus carpio) cultured in North Carolina. Plasmodia measuring â¼200 µm in diameter contained tear-shaped myxospores containing a single pyriform polar capsule. The spore body was concave on one side, measuring 16.2 (14.7-16.8) µm long and 5.6 (4.5-6) µm wide. The polar capsule was 6.4 (5.8-7.2) µm long and 4.2 (3.4-4.6) µm wide, containing a polar filament coiled perpendicular to the longitudinal axis of the spore body making 8 turns. Occasionally, an oblong, irregularly shaped mass of protoplasm was observed between the polar capsule and spore capsule. Analysis of 18S small-subunit ribosomal DNA sequence demonstrated this isolate as a 99.9% match with Myxobolus toyamai from gills of C. carpio. However, the case isolate lacked the characteristic second polar capsule of Myxobolus, morphologically placing it within the Thelohanellus. Here we supplement genetic sequence data with histopathology, an amended morphological description of the agent, and a review of the original classification. For future reference, we suggest this organism be referred to as Thelohanellus toyamai Kudo, 1933, in accordance with the original classification and the nomial M. toyamai be avoided because it is at best outdated and, at worst, incorrect.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Enfermedades Parasitarias en Animales
/
Carpas
/
Myxobolus
/
Enfermedades de los Peces
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Branquias
Límite:
Animals
País/Región como asunto:
America do norte
Idioma:
En
Revista:
J Parasitol
Año:
2011
Tipo del documento:
Article
País de afiliación:
Estados Unidos