Characteristics of a new herpesviral isolate from salmonid fish.

Comparison of the DNA Homologies of Five Salmonid Herpesviruses.

“…The results of the DNA hybridization assays from our study provide a more sensitive and quantitative com parison of the relationships between the five salmonid herpesviruses and leads us to conclude, as did Hedrick et al (1987), Hayashi et al (1986Hayashi et al ( , 1987, and Igari et al (1991) that the salmonid herpesviruses are related but separable into distinct groups. Our study also suggests that HPV and SHV are most likely different strains of the same virus, as are OMV and YTV although the latter two viruses are less related to one another than HPV is to SHV.…”

“…Thus, it appears that the least related of the five salmonid her pesviruses examined in our study are more closely related than HSV 1 is to HSV 2. The results of Hayashi et al (1986Hayashi et al ( , 1987 showed a clear difference in the restriction endonuclease fragments of HPV, OMV, and the new isolate H-83 following digestion with either Bam HI, Eco RI, and Hind III. Igari et al (1991) found that following digestion with either Bam HI or Hind III the restriction endonuclease fragments of NeVTA, YTV, and CSTV were similar yet somewhat different from one another.…”

Epizootics Caused by Salmonid Herpesvirus Type 2 Infection in Maricultured Coho Salmon.

“…These profiles revealed that the isolated virus could be identified to salmonid herpes virus type 2. Several herpesviruses were reported from salmo nid fish, e. g., NeTVA from kokanee, Oncorhynchus nerka (Sano, 1976), OMV from masu salmon, O. masou , YTV from basal cell tumor tissue of masu salmon (Sano et al, 1983), H-83 from masu salmon (Hayashi et al, 1986), OKV from freshwater reared coho salmon, (Horiuchi et al, 1989), COTV from tumor tissue of coho salmon , CSLV from fresh water reared coho salmon (Kumagai et al, 1991)*1, CSTV from tumor tissue of maricultured coho salmon (Sano, 1988;Igari et al, 1991) in Japan, and Herpesvirus salmonis from rainbow trout, O. mykiss (Wolf et al, 1978) and steelhead herpesvirus from steelhead trout, O. mykiss (Hedrick et al, 1986) in North America. According to these reports, all of those Japanese isolants were neutralized by anti -OMV or anti-NeVTA serum.…”

Herpesviruses of Fish, Amphibians and Invertebrates

“…In the same period a number of herpesviruses was isolated in Japan from different salmonid species, such as kokanee salmon (Oncorhynchus nerka) (Sano, 1976), masu salmon (Oncorhynchus masou) (Hayashi et al, 1986;Kimura et al, 1981b), yamame (Oncorhynchus masou) (Sano et al, 1983), coho salmon (Oncorhynchus kisutch) (Kumagai et al, 1994), and rainbow trout (Yoshimizu et al, 1995). The viruses appeared to be highly pathogenic particularly for young fry of different salmonid species (Kimura et al, 1983;Yoshimizu et al, 1995).…”

“…Interestingly, surviving fish developed epithelial tumours around the mouth (Kimura et al, 1981a;Sano et al, 1983;Yoshimizu et al, 1987). Subsequent serological and DNA restriction endonuclease cleavage analysis demonstrated that all isolates could be considered as a single virus species, designated Salmonid herpesvirus 2 (SalHV-2) (Hayashi et al, 1986;Hayashi et al, 1989;Hedrick et al, 1987;Yoshimizu et al, 1995). A third salmonid herpesvirus caused high mortalities among hatchery-reared juvenile lake trout (Salvelinus namaycush) in the Great Lakes Region of the USA for several subsequent springs and falls (6-15°C) during the mid-1980s (Kurobe et al, 2009).…”