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Ultrastructural identification of a herpes-like virus infection in common carp Cyprinus carpio in KoreaDong Lim Choi*, Sang Gyu Sohn, Jong Deuk Bang, Jeong Wan Do, Mi Seon ParkPathology Division, National Fisheries Research and Development Institute, 408-1 Silang, Gijang, Busan 612-900, Republic of KoreaABSTRACT: We report on a herpes-like virus, which was found to be associated with mass mortality of common carp Cyprinus carpio for the first time in Korea in 1998. The external signs of infection in moribund fish were darkened coloration and severe branchial necrosis in the gill. Transmission electron microscopy revealed the presence of herpes-like viruses in spleen tissue. Infected spleen cells showed hypertrophied nuclei and degeneration. Numerous nucleocapsids of about 82 nm in diameter were found within the nucleus and cytoplasm of infected cells, and extracellular enveloped particles were also observed. We conclude that this virus was a likely significant cause of the high mortality of common carp in Korea in 1998.
KEY WORDS: Herpes-like virus · Common carp · Cyprinus carpio · Mortality
Published in DAO Vol.
61, No. 1-2
(2004) on October 21
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