During these visits, sanitation practices receive significant attention because cleanliness directly impacts animal welfare, biosecurity, and research validity.
Understanding what AAALAC inspectors evaluate in vivarium cleaning programs can help facilities maintain continuous audit readiness, reduce compliance risk, and improve operational consistency.
AAALAC inspections are not based on arbitrary preferences. Site visitors evaluate facilities using recognized scientific standards.
The most important reference is the Guide for the Care and Use of Laboratory Animals, which is widely considered the international benchmark for laboratory animal care programs.
Animal housing and environment
Facility design and maintenance
Veterinary care programs
Sanitation and husbandry practices
It is also the primary standard used by AAALAC to assess institutional animal care and use programs.
AAALAC Guidance Statements
Institutional policies and SOPs
Applicable regulations (USDA, PHS Policy, etc.)
These documents together define the expectations for vivarium sanitation programs.
The first thing inspectors typically evaluate is whether the facility has formalized sanitation procedures.
AAALAC expects institutions to maintain documented SOPs that describe how cleaning is performed and how standards are maintained.
Room cleaning frequency
Cage and rack sanitation procedures
Approved disinfectants and concentrations
Cleaning equipment and supplies
Waste removal and disposal procedures
The Guide emphasizes that an effective animal care program must integrate policies, procedures, personnel training, and facility management into daily operations.
Without standardized SOPs, it becomes difficult to demonstrate consistent sanitation practices across rooms, technicians, or shifts.
AAALAC reviewers also verify whether cleaning schedules meet accepted standards.
For example, the Guide recommends that solid-bottom cages be sanitized at least weekly, although some housing systems such as individually ventilated cages (IVCs) may justify alternative schedules if properly validated.
Cage sanitation schedules
Rack washer cycles
Room cleaning frequencies
Validation data supporting alternative practices
Facilities that deviate from typical schedules must be able to justify those decisions scientifically or through institutional oversight.
One of the most common issues identified during audits is poor documentation. AAALAC inspectors want to see evidence that sanitation procedures are being performed consistently.
Room cleaning logs
Cage wash records
Equipment sanitation logs
Disinfectant preparation records
Preventive maintenance documentation
In preparation checklists used by many institutions, facilities are advised to maintain records demonstrating that sanitation procedures are routinely performed and monitored.
If records are incomplete or inconsistent, reviewers may question whether SOPs are actually being followed.
Beyond reviewing documentation, AAALAC site visitors spend a significant amount of time walking through animal facilities.
Animal rooms
Procedure rooms
Cage wash areas
Storage spaces
Hallways and shared equipment areas
Clean floors and surfaces
Proper waste handling
Organized storage areas
Functional equipment
Clearly labeled supplies
Inspectors often look for visible indicators of sanitation quality, such as:
Even small issues—such as clutter, poorly maintained equipment, or improperly stored cleaning tools—can signal gaps in sanitation oversight.
A sanitation program is only as strong as the people implementing it.
AAALAC inspectors frequently speak directly with technicians and animal care staff during site visits to confirm that they understand facility procedures.
Room cleaning protocols
Disinfectant use and dilution procedures
PPE requirements
Waste handling procedures
Biosecurity practices
The Guide emphasizes that personnel working with laboratory animals must be appropriately trained and qualified to perform their responsibilities.
Training records and competency verification programs are therefore essential components of a compliant sanitation program.
Finally, AAALAC reviewers evaluate sanitation within the context of the entire animal care and use program.
IACUC oversight
Veterinary care programs
Occupational health and safety
Facility management and maintenance
Animal housing and husbandry
These elements work together to support the humane care and use of laboratory animals and ensure research quality.
For sanitation programs, this means cleaning practices should align with institutional policies, veterinary recommendations, and approved animal protocols.
Vivarium programs that consistently perform well during AAALAC reviews typically share several operational characteristics.
Facilities use consistent tools, disinfectants, and workflows across animal rooms.
Cleaning activities are recorded routinely and reviewed regularly.
Facilities can demonstrate that cleaning practices effectively control contamination.
Technicians receive structured onboarding and ongoing training.
Vivarium leadership works closely with veterinary staff and the IACUC.
Together, these elements create a sanitation program that supports both animal welfare and regulatory compliance.
AAALAC accreditation reflects an institution’s commitment to maintaining high standards in laboratory animal care. Because sanitation practices affect animal health, research reproducibility, and facility biosecurity, inspectors carefully evaluate vivarium cleaning programs during site visits.
Facilities that prioritize clear SOPs, strong documentation, well-trained staff, and consistent sanitation practices are far more likely to demonstrate compliance during accreditation reviews.
For vivarium managers, the goal should not simply be preparing for the next inspection—but building sanitation systems that keep the facility inspection-ready every day of the year.