School of Veterinary Medicine

Takuya Kato

  (加藤 卓也)

Profile Information

Affiliation
Associate Professor, Laboratory of Wildlife Medicine, Faculty of Veterinary Science, Nippon Veterinary and Life Science University
Degree
Ph.D.(Veterinary Science)(Mar, 2011, Graduate School of Veterinary Medicine and Life Science, Nippon Veterinary and Life Science University)

J-GLOBAL ID
201501001433175568
researchmap Member ID
B000249758

Papers

 43
  • Kandai Doi, Takuya Kato, Minori Kono, Fumiaki Yamasaki, Shin-ich Hayama
    Mammal Study, 49(3), Jun 6, 2024  Peer-reviewed
  • Ayaka Kitajima, Toshihiro Tokiwa, Kandai Doi, Kaito Kotani, Hiroko Otsubo, Chinatsu Kamei, Hiromitsu Hitani, Toshiaki Yamamoto, Takuya Kato
    Parasitology International, 102913-102913, Jun, 2024  Peer-reviewed
  • Shin-Ichi Hayama, Setsuko Nakanishi, Aki Tanaka, Takuya Kato, Chinatsu Watanabe, Nobutaka Kikuchi, Risa Danjo, Ayano Matsuda, Wakako Mori, Yuki Kawabata, Hikari Akiba, Fumiharu Konno, Yoshi Kawamoto, Toshinori Omi
    Archives of environmental contamination and toxicology, Apr 25, 2024  Peer-reviewed
    We examined the conception rate of wild Japanese monkeys (Macaca fuscata) in Fukushima City that were exposed to radiation as a result of the Fukushima Daiichi Nuclear Power Plant accident in March 2011. The conception rate in the year of delivery from 2009 to 2022 was estimated by dissecting individuals that were euthanized by the government for population control as a countermeasure against crop damage. To evaluate the effects of exposure, the cumulative exposure dose for each individual was calculated using the concentration of radiocesium deposited in the soil at the capture site and the concentration of radiocesium in muscle estimated from the aggregated transfer factor. There were no significant differences in conception rates across all age classes over time. In terms of conception rates by age class, there was a significant decrease post-exposure compared with pre-exposure in the age class ≥ 8 years, but no significant differences in the age class 5-7 years. The non-ovulation rate did not significantly differ between the pre- and post-exposure periods for any age class. Body fat index, which can affect fertility, was compared between the pre- and post-exposure periods, and no significant differences were found in either age class. In contrast, the median total cumulative exposure (cumulative internal exposure + cumulative external exposure) was significantly higher in the age class ≥ 8 years compared with the age class 5-7 years. These results suggest that the total cumulative exposure dose may be one of the reasons for the lower conception rate in the post-exposure period among the age class ≥ 8 years.
  • Nana Ushine, Makoto Ozawa, Shouta M. M. Nakayama, Mayumi Ishizuka, Takuya Kato, Shin-ichi Hayama
    Animals, 13(14) 2338-2338, Jul, 2023  Peer-reviewed
    Lead (Pb), an environmental pollutant, has been widely reported to have contaminated mammals, including humans and birds. This study focuses on the effects of Pb pollution on avian influenza virus (AIV) antibody production. A total of 170 black-headed gulls (Chroicocephalus ridibundus) were captured in Tokyo Bay (TBP) from January 2019 to April 2020 and in Mikawa Bay (MBP) from November 2019 to April 2021. The gulls were weighed, subjected to blood sampling, and released with a ring band on their tarsus. The samples were used to measure blood Pb levels (BLL) and AIV-specific antibodies. The BLL were compared using the Wilcoxon two-sample test between the period when black-headed gulls arrived and the wintering period, defined by the number of gulls counted in each area. A significant increase was found in the TBP. A decrease in BLL significantly increased antibody titer during wintering in TBP and MBP. Pb pollution had a negative effect on the production of AIV antibodies. These findings suggest that wild birds that were contaminated by Pb in the environment may facilitate the spread of zoonotic diseases, further increasing the possibility that environmental pollutants may threaten human health.
  • Nana Ushine, Shouta MM Nakayama, Mayumi Ishizuka, Takuya Kato, Shin-ichi Hayama
    Japanese Journal of Environmental Toxicology, 26 25-37, Jun, 2023  Peer-reviewed

Misc.

 16

Books and Other Publications

 4

Presentations

 47

Teaching Experience

 4

Research Projects

 2