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국내 양식 흰다리새우에서 검출된 노랑머리바이러스(YHV-8)의 유전학적 특성
김석렬,( Gunasekara Cwr ),( Wimalasena Shmp ),신기욱 한국어병학회 2020 한국어병학회지 Vol.33 No.1
This study was performed for screening yellow head virus(YHV) complex in 252 including 235 white leg shrimps (Litopenaeus vannamei) and 17 oriental shrimp (Fenneropenaeus chinensis) collected from 18 farms located in southwestern province of Korea. The virus complex was detected by nested reverse-transcriptase polymerase chain reaction (RT-PCR) assay. In the assay, amplicons were resulted in RNAs exracted from 38 shrimps (21 white leg shrimps and 17 oriental shrimps) obtained from 7 farms. In phylogenetic analysis using sequences of ORF1b gene, all 38 sequences obtained in this study formed an independent lineage with YHV-8 genotype firstly isolated in China, belonged to an YHV-8 clade.
Disinfectant effect of monopersulfate (MPS) compound to white spot syndrome virus (WSSV) of shrimp
( Cwr Gunasekara ),( Seok-ryel Kim ),( Lgtg Rajapaksha ),( Shmp Wimalasena ),( Hnks Pathirana ),( Gee-wook Shin ) 한국어병학회 2020 한국어병학회지 Vol.33 No.2
This study investigated the disinfection effect of monopersulfate (MPS) compound against white spot syndrome virus (WSSV) by bioassay using kuruma shrimp (Marsupenaeus japonicas). A WSSV stock was prepared with muscle homogenate from WSSV-infected whiteleg shrimp (Penaeus vannamei) and its lethal dose 50% endpoint (LD<sub>50</sub>) and infectious dose 50% endpoint (SID<sub>50</sub>) were respectively determined as 10<sup>-5.63</sup> and 10<sup>-6.79</sup> in bioassay using kuruma shrimp, followed by PCR assays. The disinfective effect of MPS compound (1.2 ppm, 2.4 ppm, 4.8 ppm) was performed by bioassay using about 10-fold higher dilution (10<sup>-4</sup>) of WSSV homogenate. The compound resulted in WSSV inactivation by a concentration-dependent manner. In addition, 4.8 ppm of MPS completely prohibited WSSV infection. To our knowledge, this study is the first report about the usefulness of MPS as a disinfectant to WSSV.