Journal of fish pathology (한국어병학회지)

The Korean Society of Fish Pathology (한국어병학회)
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Isolation of rhabdovirus-like from fry of the fry of the snakehead fish, Channa arga

가물치, Channa arga 자어에서 분리한 Rhabdovirus 유사 병원체

  • Published : 2006.04.01
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Abstract

Rhabdovirus-like virus were isolated from the fry (15~30 days post hatching, dph) and rearing water of the snakehead fish Channa arga exhibiting mass mortality in spring of 2003 and 2004 in Korea. The isolates were propagated in EPC and SSN-1 cells but not replicated in FHM cells. The bullet-shaped viral particles (45×100 nm) appeared to be compact and a similar morphology to those of the rhabdoviruses in the infected EPC cells. The optimum temperature for virus replication was 20 to 25℃ but they could not replicate at 15℃. The isolates ShFRV-3 and ShFRV-5 from snakehead fish showed high pathogenicity against the fry (15 dph) and fingering (40 dph) of snakehead fish but did not in the larger size (90 dph).

2003~2004년 봄, 대량 폐사한 가물치 자어 (부화 후 15~30일령)에서 랩도바이러스 유사 병원체를 분리하였다. 분리 바이러스주는 EPC cell과 SSN-1 cell에서 잘 증식하는 반면 FHM cell에는 감수성이 없었고 감염된 EPC cell에서 전형적인 랩도바이러스 모양의 탄환형 바이러스 입자 (45×100 nm)를 다수 관찰할 수 있었다. 분리 바이러스주의 증식 적온은 20~25℃이었고, 15℃이하에서는 증식할 수 없었으며, 30℃ 이상에서는 증식하지는 않았으나 초기 감염가를 유지하였다. 분리 바이러스는 15일령 및 40일령의 가물치 자치어에서는 침지 감염에서 병원성이 높은 반면, 90일령 이상의 중간 육성어에서는 폐사를 나타내지는 않았다.

Keywords

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