Endemic infections of bovine viral diarrhea virus genotypes 1b and 2a isolated from cattle in Japan between 2014 and 2020     

Asami NISHIMORI  Shizuka HIROSE  Saho OGINO  Kiyohiko ANDOH  Norikazu ISODA  Yoshihiro SAKODA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2022,84(2):228

Bovine viral diarrhea virus (BVDV) is a causative agent of bovine viral diarrhea. In Japan, a previous study reported that subgenotype 1b viruses were predominant until 2014. Because there is little information regarding the recent epidemiological status of BVDV circulating in Japan, we performed genetic characterization of 909 BVDV isolates obtained between 2014 and 2020. We found that 657 and 252 isolates were classified as BVDV-1 and BVDV-2, respectively, and that they were further subdivided into 1a (35 isolates, 3.9%), 1b (588, 64.7%), 1c (34, 3.7%), and 2a (252, 27.7%). Phylogenetic analysis using entire E2 coding sequence revealed that a major domestic cluster in Japan among BVDV-1b and 2a viruses were unchanged from a previous study conducted from 2006 to 2014. These results provide updated information concerning the epidemic strain of BVDV in Japan, which would be helpful for appropriate vaccine selection.  相似文献   

First report of horn gall disease of Cinnamomum pseudopedunculatum caused by Laurobasidium hachijoense in the Bonin Islands,Japan     

Shibata  Saho  Ono  Tsuyoshi  Kobayashi  Yoshiko  Miyagawa  Itsuha  Mukai  Akitsugu  Ichioka  Youzou  Takenaka  Izumi  Nakano  Hideto  Hirooka  Yuuri 《Journal of General Plant Pathology》2021,87(5):322-325

Journal of General Plant Pathology - In June 2017, deer-horn-like galls covered with a whitish, powdery fungal layer were found on the trunks of Cinnamomum pseudopedunculatum (Lauraceae) in...  相似文献   

A preliminary report on a Peridermium species found on Pinus pumila Regel in Japan1     

H. Saho  I. Takahashi 《Forest Pathology》1976,6(3):187-191

A hithcrto unrecorded Periderminm spccies was found on shoots of Pinus pumila Regel in Hokkaido, Japan. The rust has unbranched and uninucleate germ tubes with pointcd tips. Alternate host plants have not been found. The rust is considered to be a pine-to-pine species.  相似文献   

Repeated reaching of the harmful algal bloom of Karenia spp. around the Pacific shoreline of Kushiro,eastern Hokkaido,Japan, during autumn 2021     

Hasegawa  Natsuki  Watanabe  Tsuyoshi  Unuma  Tatsuya  Yokota  Takashi  Izumida  Daisuke  Nakagawa  Toru  Kurokawa  Tadahide  Takagi  Satomi  Azumaya  Tomonori  Taniuchi  Yukiko  Kuroda  Hiroshi  Kitatsuji  Saho  Abe  Kazuo 《Fisheries Science》2022,88(6):787-803

Unprecedented large-scale algal blooms were observed during autumn 2021 around the Katsurakoi fishing port, Kushiro, eastern Hokkaido, Japan. Monitoring of shoreline water showed that chlorophyll a (Chl a) concentrations and the cell density of Karenia spp., dominated by Karenia selliformis, repeatedly increased synchronously between September and November 2021. These increases were associated with a southerly wind-driven current, which transported offshore water on the shelf towards the shoreline at the sea surface. The blooms were prolonged as a result of algal accumulation in the semi-closed fishing port. The maximum Chl a concentration and cell density exceeded 50 µg Chl a/L and 10⁴ cells/mL, respectively. During the autumn bloom of Karenia spp., the nitrate?+?nitrite and phosphate concentrations in the water were lower than those in 2019 and 2020, and the silicate concentration was comparable. The ammonium concentration during the bloom was notably higher than before the bloom period, reaching 15 µM. Mass mortality of several fish species and echinoderms that were cultured using rearing water intake from the same shoreline occurred synchronously with the increase in Karenia spp.

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Swimming angle and target strength of larval Japanese anchovy (<Emphasis Type="Italic">Engraulis japonicus</Emphasis>)     

Yusuke Ito  Hiroki Yasuma  Reiji Masuda  Kenji Minami  Ryuichi Matsukura  Saho Morioka  Kazushi Miyashita 《Fisheries Science》2011,77(2):161-167

The swimming angle of larval Japanese anchovy (Engraulis japonicus) was measured in a tank, and target strength (TS) was calculated using a theoretical scattering model. The mean swimming angle was 12.8° (SD ±22.1). Increased speeds of flow led to increased mean swimming angles. The mean swimming angle at flow of 5 cm s⁻¹ was higher than at other speeds. TS values were estimated using a distorted-wave Born approximation model for two cases. Average values were 1–3 cm s⁻¹ (11.5° ± 22.1) and 5 cm s⁻¹ (16.6° ± 21.7) for cases 1 and 2, respectively. For case 1, TS ranged from −92.0 to −74.7 dB with a mean of −79.4 dB at 120 kHz. For case 2, TS ranged from −92.2 to −75.2 dB with a mean of −79.9 dB. The mean TS in case 2 was lower than that in case 1, with the maximum difference being 1.0 dB at 120 kHz (standard length 22.0 mm). However, there were no significant differences between the regression lines of cases 1 and 2. Thus, changes in flow speed altered the swimming angle of larval Japanese anchovy, but had little influence on TS.  相似文献