National Institute of Animal Health, NARO

Swine Viral Disease Unit

The objective of our unit is to investigate swine viral diseases that cause economic damage to pig industry in Japan. Most of the causative viruses latently infect farming pigs and the infected pigs occasionally exhibit clinical signs such as reproductive disorder in sows and sudden death or diarrhea in piglets. The elimination or decrease of infectious viruses is important for the stable farming system.
To grasp spatial distributions of the viruses, especially porcine reproductive and respiratory syndrome (PRRS) virus, Aujeszky's disease virus and porcine rotavirus, we periodically conduct virological and serological tests or PCR in pig samples collected in Japan and then analyze antigenic or genetic diversity. On some viral isolates we make pathological and immunological comparisons with foreign isolates through animal experiments to elucidate pathological diversity. Additionally, we attempt to develop some vaccines or diagnostic methods with new genetic engineering approaches.
We expect to contribute to pig industry and the related administrative offices through our research.


Unit Leader

Toshiyuki TSUTSUI


Unit Members

  • Ayako MIYAZAKI
  • Mitsutaka IKEZAWA
  • Corporate Number 7050005005207