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 
Microbiological monitoring
Sentinel Health Report
Date | 2F | 3F | 4F |
3-A to 3-D | 3-1 to 3-8 | 4-A to 4-C |
June, 2025 | | |  | |
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 :  | | |
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