TWO NEW CERATOMYXA SPECIES (MYXOSPOREA: CERATOMYXIDAE) INFECTING THE GALL BLADDER OF MARINE FISHES FROM THE SOUTH-CENTRAL COAST OF VIETNAM.

Autor:	Chinh NN; Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam., Ha VT; Coastal Branch of Joint Vietnam-Russia Tropical Science and Technology Research Centre, 30 Nguyen Thien Thuat, Nha Trang, Khanh Hoa 57000, Vietnam., Dien TD; Coastal Branch of Joint Vietnam-Russia Tropical Science and Technology Research Centre, 30 Nguyen Thien Thuat, Nha Trang, Khanh Hoa 57000, Vietnam., Dang M; Institute of Veterinary Research and Development of Central Vietnam, Km 4, 2/4 street, Vinh Hoa, Nha Trang, Khanh Hoa 57000, Vietnam., Doanh PN; Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam.; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam., Whipps CM; College of Environmental Science and Forestry, Environmental Biology, State University of New York, 1 Forestry Drive, Syracuse, New York 13210., Shirakashi S; Aquaculture Research Institute, Kindai University, 3153 Shirahama, Nishimuro, Wakayama, 649-2211, Japan.
Jazyk:	angličtina
Zdroj:	The Journal of parasitology [J Parasitol] 2024 Jul 01; Vol. 110 (4), pp. 393-401.
DOI:	10.1645/24-2
Abstrakt:	Myxospores discovered floating free in the bile of marine fishes from the south-central coast of Vietnam were identified using morphological and molecular methods, leading to the description of 2 new species. Ceratomyxa chauvanminhi n. sp. was detected in 16% (8/50) of cultured barramundi Lates calcarifer (Bloch) specimens, and Ceratomyxa sekoi n. sp. was found in 20% (5/25) of wild largehead hairtail Trichiurus lepturus Linnaeus specimens. The spores of C. chauvanminhi n. sp. are very shallowly ovoid, slightly crescent shaped, and 11.5 ± 0.5 (10.7-12.4) μm thick, 5.8 ± 0.2 (5.4-6.1) μm long, and 5.5 ± 0.2 (5.2-5.7) μm wide. Their posterior angles are slightly concave at 158.7° ± 4.2° (151.3°-164.8°), and they possess 2 equal spherical polar capsules 2.5 ± 0.2 (2.1-2.9) μm in diameter. The spores of C. sekoi n. sp. are 5.6 ± 0.2 (5.0-6.1) μm long, 75.5 ± 4.8 (68.9-90.0) μm thick, and 5.5 ± 0.1 (5.4-5.6) μm wide, with 2 equal, slightly anterior spherical polar capsules 2.1 ± 0.2 (1.7-2.4) μm in diameter. Although C. sekoi n. sp. spores resemble those of species of MyxodavisiaZhao, Zhou, Kent, and Whipps, 2008, characterized by long tapering valves, genetic analyses distinctly place this new species within the Ceratomyxa Thélohan, 1892 lineage. This study contributes to the understanding myxosporean diversity in Vietnamese waters and highlights the difficulty associated with distinguishing between the genera Ceratomyxa and Myxodavisia. (© American Society of Parasitologists 2024.)
Databáze:	MEDLINE
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