Sentinel mouse program
The RIKEN BRC has adopted the sentinel mouse program, a specialized approach with the microisolator cage system. A sentinel mouse cage containing four mice is laid on a microisolator cage rack and small pieces of bedding material from all cages of the rack are collected and placed in the sentinel mouse cage. One mouse from a sentinel cage are subjected to in-house examination at regular intervals.
We classify the microorganisms into four classes according to the risk presented to the mouse in Japan. All sentinel mice are tested for class A and B. Sentinel mice kept in the room for immuno-deficient mice are screened for class C as well. Class D contains certain pathogens believed not to exist in the Japanese mouse colony; therefore, mice are examined only at the request and expense of the recipient.
* The health reports of 3-A,B in July 2024 were corrected because there was an error in the description. If you have any question, please contact us.
Monitoring of Hantaan virus and dermatophytes
Monitoring of Class D pathogens in the barrier facility
Health Report 
(BRC facility Health Report in the last year and a half)
Health Reports in RIKEN BRC Cryorecovery Work
Sentinel Health Report
Date 2F 3F 4F
3-A to 3-D 3-1 to 3-8 4-A to 4-C
September, 2025 
3-A : ,3-B :
3-C : ,3-D :
August, 2025 4-B :
,4-C :
July, 2025 4-A :
June, 2025 3-A : ,3-B :
3-C : ,3-D :
May, 2025 4-A :
4-B : ,4-C :
April, 2025 3-A : ,3-B :
3-C : ,3-D :
March, 2025
February, 2025 4-A :
4-B,C :
January, 2025 3-A,B :
3-C,D :
December, 2024
November, 2024 4-A :
4-B,C :
October, 2024 3-A,B :
3-C,D :
September, 2024
August, 2024 4-A :
4-B,C :
July, 2024 3-A,B* :
3-C,D :
June, 2024
May, 2024 4-A :
4-B,C :
April, 2024 3-A,B :
3-C,D :
March, 2024
February, 2024 4-A :
4-B,C :
January, 2024 3-A,B :
3-C,D :
December, 2023
November, 2023 4-A :
4-B,C :
October, 2023 3-A,B :
3-C,D :
September, 2023
August, 2023 4-A :
4-B,C :
July, 2023 3-A,B :
3-C,D :
June, 2023
May, 2023 4-A :
4-B,C :
April, 2023 3-A,B :
3-C,D :
March, 2023
February, 2023 4-A :
4-B,C :
January, 2023 3-A,B :
3-C,D :
December, 2022
November, 2022 4-A :
4-B,C :
October, 2022 3-A,B :
3-C,D :
September, 2022
August, 2022 4-A :
4-B,C :
July, 2022 3-A,B :
3-C,D :
June, 2022
May, 2022 4-A :
4-B,C :
April, 2022 3-A,B :
3-C,D :
March, 2022 4-A,B :
4-C :
February, 2022 3-C,D :
January, 2022 3-A,B :
December, 2021 4-A,B :
4-C :
November, 2021 3-C,D :
October, 2021 3-A,B :
September, 2021 4-A,B :
4-C :
August, 2021 3-C,D :
July, 2021 3-A,B :
June, 2021 4-A,B :
4-C :
May, 2021 3-C,D :
April, 2021 3-A,B :
March, 2021 4-A,B :
4-C :
February, 2021 3-A,B :
3-C,D :
January, 2021 4-C :
December, 2020 4-A,B :
November, 2020 3-A,B :
3-C,D :
October, 2020
September, 2020
August, 2020
July, 2020
June, 2020
April, 2020
March, 2020
February, 2020
January, 2020
December, 2019
November, 2019
October, 2019
September, 2019
August, 2019
July, 2019
June, 2019
May, 2019
April, 2019
March, 2019
February, 2019
January, 2019
December, 2018
November, 2018
October, 2018
September, 2018
August, 2018
July, 2018
June, 2018
May, 2018
April, 2018
March, 2018
February, 2018
January, 2018
December, 2017
November, 2017
October, 2017
September, 2017
August, 2017
July, 2017
June, 2017
May, 2017
April, 2017
March, 2017
February, 2017
January, 2017
December, 2016
November, 2016
October, 2016
September, 2016
August, 2016
July, 2016
June, 2016
May, 2016
April, 2016
March, 2016
February, 2016
January, 2016
December, 2015
November, 2015
October, 2015
September, 2015
August, 2015
July, 2015
June, 2015
May, 2015
April, 2015
March, 2015
February, 2015
January, 2015
December, 2014
November, 2014
October, 2014
September, 2014
August, 2014
July, 2014
June, 2014
May, 2014
April, 2014
March, 2014
February, 2014
January, 2014
December, 2013
November, 2013
October, 2013
September, 2013
August, 2013
July, 2013
June, 2013 
May, 2013
April, 2013
March, 2013
February, 2013
January, 2013
December, 2012
November, 2012
October, 2012
September, 2012
August, 2012
July, 2012
June, 2012
May, 2012
April, 2012
March, 2012
February, 2012
January, 2012
December, 2011
November, 2011
October, 2011
