An animal facility’s occupational health program (OHP) is a separate PHS Policy and Guide for the Care and Use of Laboratory Animals requirement from the coursework covered in CASRAI’s IACUC training guide. Where IACUC training documents that a person knows how to perform a procedure, the occupational health program manages the physical risk of doing it — the medical evaluation, risk assessment, personal protective equipment, and exposure-response protocols built around the actual species and hazards a person will encounter. This guide covers what a compliant OHP consists of: who must be enrolled, how risk is assessed and categorized, what medical support looks like at each stage, and how species-specific hazards like zoonotic disease and laboratory animal allergy (LAA) are managed.
The regulatory basis
PHS Policy on Humane Care and Use of Laboratory Animals (Section IV.C.1.f) requires that an institution’s Animal Welfare Assurance describe an occupational health program for personnel who have contact with animals, and the Guide for the Care and Use of Laboratory Animals (8th edition) lists occupational health and safety as a required element of an institution’s animal care and use program. Neither document specifies exact medical tests, screening intervals, or PPE items — those are institution-designed, based on a risk assessment of the actual work involved. The most detailed reference institutions actually build their programs around is the National Research Council report Occupational Health and Safety in the Care and Use of Research Animals (1997), which OLAW and most institutional occupational health services still treat as the field’s baseline reference for program design, even though it predates the current 8th-edition Guide.
Who must be enrolled
Scope is set institutionally, but the common baseline is anyone with direct or indirect contact with research animals, their tissues, body fluids, or their housing and waste — not just people physically handling live animals. That routinely includes principal investigators and research staff performing procedures, animal care technicians, veterinary staff, facility maintenance and custodial personnel who enter animal housing areas, and sometimes IACUC members who conduct facility inspections. Institutions vary on where they draw the line for occasional or observation-only access; some require enrollment for anyone entering animal facility space at all, while others scope enrollment more narrowly to hands-on contact. Because this is set locally, “do I need occupational health clearance” is genuinely a check-your-own-institution question, not one with a single universal answer — but the underlying obligation to have a program covering these categories of personnel is not optional.
Risk assessment: the mechanism that drives everything else
A compliant OHP starts with a job hazard analysis (JHA) for each person’s actual duties, not a blanket questionnaire applied identically to everyone. The assessment considers the species involved, the hazardous materials and agents present (biological, chemical, physical, radiological), exposure intensity, frequency and duration, and the individual’s own susceptibility and occupational history. Programs typically stratify the resulting risk into tiers — commonly described along a spectrum from no/negligible risk through low, minimal, and elevated risk — and that tier determines what medical evaluation, immunizations, and PPE apply to that person’s specific role. This is why two people working in the same facility can have meaningfully different OHP requirements: a person doing occasional cage-side observation of mice and a person performing survival surgery on nonhuman primates are not assessed, or managed, identically.
Risk mitigation itself follows the standard occupational-safety hierarchy of controls, applied in order of effectiveness rather than defaulting straight to PPE: eliminating or substituting the hazard where possible, engineering controls (ventilated cage racks, biosafety cabinets, facility containment design), administrative controls (procedures, training, access restriction), and only then personal protective equipment as the last layer — not the first line of defense.
Medical support across three timeframes
Rather than one generic annual physical, a well-designed OHP provides medical support matched to three distinct points in someone’s involvement with animal work:
- Pre-placement evaluation — before someone starts animal-related work, this reviews medical history, allergy history, and immunization status, provides individualized hazard counseling based on the risk assessment for their role, and administers indicated immunizations or baseline testing (for example, measles/rubeola immunity confirmation is a common requirement before nonhuman primate work, given the risk of primate-to-human measles transmission).
- Ongoing medical contact — current occupational-health guidance treats this primarily as periodic reinforcement (hazard reminders, symptom check-ins, updated risk-assessment review as duties change) rather than routine repeat clinical testing for everyone; blanket periodic medical exams are increasingly viewed as not clinically warranted for most low-risk roles, with testing reserved for people whose specific exposure profile calls for it.
- Post-exposure and injury response — documented protocols for bites, scratches, needlesticks, and other exposures, including immediate first aid, medical evaluation, and (for high-consequence exposures, such as a macaque bite or scratch with B-virus exposure risk) a time-critical response procedure, since the recommended first-aid window for a possible B-virus exposure is measured in minutes, not hours.
Personal protective equipment
PPE is selected from the risk assessment, not applied as one standard kit facility-wide. Common baseline items include dedicated protective clothing, bonnets or head coverings, masks, and gloves, with shoe covers for controlled-access areas. Higher-risk work adds species- or procedure-specific items: bite-resistant gloves and mucous-membrane protection (face shields, goggles) for nonhuman primate handling given the bite and splash risk; heavier gloves and arm protection for large-animal or carnivore handling; and respiratory protection where the risk assessment identifies an airborne hazard, whether that’s an allergen, an infectious agent, or a chemical exposure such as disinfectant or anesthetic gas.
Zoonotic disease protocols
Because animal research personnel can be exposed to pathogens that transmit between animals and humans, a compliant OHP includes species-specific zoonotic disease protocols, not just a general “wash your hands” policy. Typical examples institutions build into their programs include: macaque (and other Old World monkey) bite/scratch protocols addressing herpes B virus exposure, with immediate, thorough wound cleaning as the critical first step; tuberculosis screening for personnel working with nonhuman primates; rabies pre-exposure vaccination consideration for personnel working with wildlife, bats, or other rabies-vector species; and general wound-care and reporting procedures for any animal bite or scratch, since even routine rodent bites carry infection risk that warrants documented first aid and reporting rather than being dismissed as trivial.
Laboratory animal allergy (LAA) management
Allergy to laboratory animals — most often triggered by proteins in rodent urine, dander, and saliva — is one of the most common occupational health issues in animal research, and OHP guidance increasingly treats it as a program-design problem rather than a testing problem. Periodic allergy skin or blood testing has limited predictive value for who will develop LAA and when, so current practice emphasizes prevention over surveillance: pre-placement allergy and asthma history screening to identify higher-risk individuals before exposure begins, engineering controls (filter-top or ventilated caging, biosafety cabinets for cage-changing, adequate room ventilation and air changes), administrative controls (hand hygiene, prompt removal and laundering of contaminated clothing, minimizing unnecessary time in animal rooms), and respiratory protection (properly fitted N95 respirators or powered air-purifying respirators, PAPRs) for personnel with higher exposure or an established sensitivity.
Respiratory protection program
Where the risk assessment calls for a respirator — whether for LAA, an infectious-agent exposure risk, or a chemical hazard — institutions must run a formal respiratory protection program, not just hand someone a mask. That means medical clearance to confirm the person can safely wear the respirator, fit testing to confirm the specific model and size seals correctly, and training on proper use, limitations, and maintenance. Respiratory protection is treated as the last line of defense in the hierarchy of controls above, used when engineering and administrative controls alone cannot adequately reduce exposure, not as a default substitute for them.
Who runs the program
OLAW and Guide-aligned OHP design calls for a team approach rather than one office owning it in isolation: the attending veterinarian and veterinary staff (animal-side hazard expertise), an institutional occupational health or employee/student health service (the actual medical evaluation and clearance), environmental health and safety staff (risk assessment, PPE selection, respiratory protection program administration), facility managers, and the researchers themselves. The IACUC provides program-level oversight as part of its broader animal care and use program review, but day-to-day OHP operation is normally run through occupational health services rather than the IACUC office, and PHS Policy places responsibility on the Institutional Official for ensuring that accountability for the program’s daily operation is clearly assigned to someone. Because OHP enrollment involves confidential medical information, the medical evaluation itself is typically handled entirely within occupational health/employee health channels, with only enrollment status — not medical details — visible to the IACUC or protocol-approval system.
How this differs from IACUC training
IACUC training and the occupational health program are both prerequisites the IACUC checks before approving someone onto a protocol, and both trace back to the same PHS Policy IV.C.1.f language and Guide chapter — but they are functionally distinct. IACUC training establishes knowledge and demonstrated skill for the procedures a person will perform. The occupational health program manages the physical and medical risk of being around the animals and materials involved, independent of whether the person is skilled at the procedure. Completing one does not substitute for the other, and both are typically tracked as separate line items on a protocol’s personnel roster. See CASRAI’s IACUC Training guide for the didactic-coursework side of personnel qualification.
Frequently asked questions
Is occupational health clearance the same as IACUC training?
No. IACUC training (commonly delivered through the CITI Program’s Animal Care and Use series) documents that someone knows how to perform the procedures they’re listed for. Occupational health program enrollment is a separate medical risk-assessment and clearance process, usually run through an institution’s employee or student health service, and PHS Policy and the Guide require both, not either.
Does everyone in an animal facility need the same medical screening?
No. A compliant program is risk-tiered: what’s required depends on the job hazard analysis for that person’s specific species, procedures, and exposure level. Someone doing occasional low-contact work is not assessed the same way as someone performing survival surgery on nonhuman primates.
Do I need periodic testing for laboratory animal allergy if I already passed a pre-placement screening?
Not necessarily. Current OHP guidance favors prevention (engineering and administrative controls, pre-placement history screening) over routine repeat allergy testing, because periodic testing has limited predictive value for who will develop symptoms. Your institution’s specific policy governs whether and when re-testing applies.
Who decides what PPE I need?
Your institution’s occupational health and environmental health and safety staff, based on the risk assessment for your specific role, species, and procedures — not a single facility-wide standard. Higher-risk work (for example, nonhuman primate handling) carries additional PPE requirements beyond the baseline.
What should I do if I’m bitten or scratched by a research animal?
Follow your institution’s documented exposure-response protocol immediately — for some exposures (notably macaque bites or scratches, because of B-virus risk) the recommended first-aid window is measured in minutes. Report the incident and seek the medical evaluation your program requires; do not treat any animal bite or scratch as automatically minor.
See also: IACUC Training, Guide for the Care and Use of Laboratory Animals, OLAW, Attending Veterinarian, Animal Welfare Act, and Animal Research Ethics.
