Viral gametocytic hypertrophy caused by a papova-like virus infection in the Pacific oyster Crassostrea gigas in Korea.
During a routine survey of the Pacific oyster Crassostrea gigas in Tongyoung (previously Chungmu) on the southern coast of Korea, basophilic inclusions were observed in the gonadal tissues. They were detected from March to May at a prevalence rate of 3.3 to 7.1%. The inclusion bodies were Feulgen-positive and stained orange-red with phloxine tartrazine. Electron microscopic observation revealed non-enveloped, icosahedral particles 40 to 45 nm in diameter. These morphological characteristics resemble those of papova virus-like inclusions previously described from Pacific and eastern (American) oysters C. virginica in North America. Although many mitochondrial bodies and intact sperm cells were observed around the inclusion body, no host reaction, such as hemocytic infiltration, was detected.
Choi
Dong Lim
DL
Pathology Division National Fisheries Research and Development Institute, Gijang, Busan 619-902, Republic of Korea. dlchoi@nfrdi.re.kr
Lee
Nam-Sil
NS
Choi
Hee Jung
HJ
Park
Myoung-Ae
MA
McGladdery
Sharon E
SE
Park
Mi Seon
MS
D000818:Animals; D004267:DNA Viruses; D006066:Gonads / Q000821:virology*; D006652:Histological Techniques; D007181:Inclusion Bodies, Viral / Q000648:ultrastructure*; D007723:Korea; D008854:Microscopy, Electron; D010125:Ostreidae / Q000166:cytology / Q000821:virology*; D015995:Prevalence