The 24 laboratories participating in the 2019 PEP Program, were as follows:
- AnLab Ltd., Czech Republic
- Biomedical Diagnostics ( BioDoc), Germany
- CEMIB- Multidisciplinary Center on LAS, Brazil
- Central Institute for Experimental Animals, (CIEA), Japan
- Cerberus Sciences, Australia
- Charles River Laboratories (RADS), USA
- Charles River Laboratories France
- Charles River Laboratories, Japan
- Daegu-Gyeongbuk Medical Innovation Foundation, Korea
- Division of Laboratory Animal Monitoring, NIFDC, China
- Dynamimed S.L. Madrid, Spain
- Envigo RMS SEL, Italy
- Francis Crick Institute, Microbiology Laboratory, UK
- Gem Parmatech, Nanjing, China
- IDEXX Bioresearch, Ludwigsburg, Germany
- IDEXX RADIL, Missouri, USA
- Microbiological Diagnostics, Germany
- Microbiological Monitoring Lab., Laboratory Animal Resource Center, KRIBB
- National Laboratory Animal Center (NLAC-MU), Mahidol University, Thailand
- National Laboratory Animal Center,TAIPEI, Taiwan
- QM Diagnostics, Netherlands
- SAHMRI- ComPath, Austrailia
- VRL Maryland, LLC, USA
- XpressBio, Maryland, USA