Morphologic and Genetic Evidence for Mixed Infection with Two Myxobolus Species (Myxozoa: Myxobolidae) in Gray Mullets, Mugil cephalus, from Korean Waters.
10.3347/kjp.2013.51.3.369
- Author:
Wi Sik KIM
1
;
Jeong Ho KIM
;
Myung Joo OH
Author Information
1. The Fisheries Science Institute, Chonnam National University, Yeosu 556-901, Korea.
- Publication Type:Brief Communication ; Research Support, Non-U.S. Gov't
- Keywords:
Myxobolus episquamalis;
Myxobolus sp.;
mixed infection;
mullet;
Mugil cephalus
- MeSH:
Animals;
Fish Diseases/epidemiology/*parasitology;
Myxobolus/classification/*genetics;
Phylogeny;
RNA, Ribosomal, 18S/genetics;
Republic of Korea/epidemiology;
*Smegmamorpha;
Species Specificity
- From:The Korean Journal of Parasitology
2013;51(3):369-373
- CountryRepublic of Korea
- Language:English
-
Abstract:
The present study was performed to trace the decisive evidence for mixed infection of 2 Myxobolus species, M. episquamalis and Myxobolus sp., in the gray mullet, Mugil cephalus, from Korean waters. Mullets with whitish cyst-like plasmodia on their scales were collected near a sewage plant in Yeosu, southern part of Korea, in 2009. The cysts were mainly located on scales and also found in the intestine. The spores from scales were oval in a frontal view, tapering anteriorly to a blunt apex, and measured 7.2 microm (5.8-8.0) in length and 5.3 microm (4.7-6.1) in width. Two polar capsules were pyriform and extended over the anterior half of the spore, measuring 3.5 microm (2.3-4.8) in length and 2.0 microm (1.5-2.2) in width. In contrast, the spores from the intestine were ellipsoidal, 10.4 microm (9.0-11.9) in length and 8.4 microm (7.3-10.1) in width. The polar capsules were pyriform but did not extend over the anterior half of the spore, 3.7 microm (2.5-4.5) in length and 2.2 microm (1.8-2.9) in width. The nucleotide sequences of the 18S rDNA gene of the 2 myxosporean spores from scales and intestine showed 88.1% identity to each other and 100% identity with M. episquamalis and 94.5% identity with M. spinacurvatura from mullet, respectively. By the above findings, it is first confirmed that mullets from the Korean water are infected with 2 myxosporean species, M. episquamalis and Myxobolus sp.
