# How to Conduct a Biosafety Inspection: A Checklist By the end of this guide, you will be able to plan, conduct, score, and close out a biosafety inspection in a clinical or research microbiology laboratory. You will also have a reusable biosafety inspection checklist template, a severity scale, scoring formulas, and a finding log format you can adapt to BSL-1, BSL-2, and BSL-3 spaces. Have the following on hand before you start: - The laboratory floor plan with room numbers and containment levels - The current agent inventory and active protocol list - The written [biosafety manual](/knowledge/diagnostics/emerging-tech/biosafety-manual-development-a-template-for-diagnostic-laboratories) and bench-level SOPs - Training records and competency assessments - Equipment certification records (biological safety cabinets, autoclaves, centrifuges) - The previous inspection report and its corrective action evidence - The incident and exposure log for the last 12 months - Your own lab coat, gloves, and eye protection, plus a clipboard or tablet loaded with the checklist Carry a flashlight. Certification stickers, eyewash test tags, and expiration dates sit in exactly the places nobody looks without one. ## What a Biosafety Inspection Covers, and Who Performs It A biosafety inspection is a systematic, documented comparison between what a laboratory actually does and what written requirements say it should do. It covers six things: physical conditions, equipment, work practices, records, staff knowledge, and the management systems that keep the first five alive between visits. It is a different exercise from a biosafety risk assessment. The risk assessment is the upstream judgment about an agent, a procedure, and the people performing it, which then selects practices, safety equipment, and facility features. The inspection verifies that those decisions hold on an ordinary working day, not only in the policy binder. Experience from the SARS outbreak underlined the point that a safety policy built on a risk assessment of the exact manipulations performed, and on the training and attitudes of staff, matters more than stacks of administrative controls [1]. In the United States, the reference framework is Biosafety in Microbiological and Biomedical Laboratories (BMBL), published by the CDC and NIH. Because BMBL was not written for the day-to-day rhythm of diagnostic work, a CDC-convened Blue Ribbon Panel issued supplemental guidelines for human and animal diagnostic laboratories. Those guidelines promote a culture of safety, supplement BMBL for routine diagnostic operations, and are explicitly recommendations rather than requirements [2]. A local checklist is how a laboratory converts recommendations into verifiable, room-by-room items. Inspections are performed by institutional biosafety officers and program staff, biosafety committee members, internal auditors, and external accreditors or regulators. Whoever performs the visit needs competence beyond infectious agents, because laboratories concentrate chemical, radiological, physical, and ergonomic hazards in the same rooms. One academic health program addressed this by codifying 50 basic health and safety items that any safety specialist should know, then cross-training its biosafety staff against that list, which improved compliance across the institution [3]. ## Before You Inspect: Preparation 1. **Define the scope.** List the rooms, containment levels (BSL-1 through BSL-3, plus animal or insectary spaces if present), and shared equipment in scope. Decide whether this is a full audit or a focused recheck of prior findings. 2. **Pull the documents a week ahead.** Request the biosafety manual, risk assessments, SOPs, training records, certification records, autoclave logs, incident reports, and the previous report with closure evidence. Walking in without them turns a two-hour inspection into a records hunt. 3. **Read the biosafety risk assessments first.** The inspection tests the risk assessments as much as the laboratory. A structured gap analysis, comparing written requirements line by line against observed practice, is the same method used when reviewers compare one country's regulatory framework against international standards for high-containment laboratories [4]. 4. **Prepare the inspector.** Review the checklist, calibrate severity assignments with a second reviewer on two or three practice items, and confirm your own cross-training covers the hazard classes present in the rooms. 5. **Set the schedule and communicate it.** Announce the visit, book an opening meeting, and reserve uninterrupted time to observe actual bench work. 6. **Use program data to focus the visit.** A [biosafety program](/knowledge/diagnostics/emerging-tech/biosafety-program-implementation-a-roadmap-for-diagnostic-laboratories) can be described with a public health logic model: inputs (staffing and budget), activities (risk assessments, surveillance, training, incident response), and outcomes (exposures, injuries, compliance, satisfaction). Monthly activity data shows which activities are thin and tells you where the inspection should dig [5]. 7. **Plan for abnormal conditions.** When operations are disrupted, program tasks sort into three groups: those that shrink, those that must continue for safety or compliance, and those that expand sharply. Inspections of core controls belong in the must-continue group, a lesson drawn from how one university biosafety program pivoted during COVID-19 [6]. The same team continued conducting inspections and protocol reviews while supporting mass testing, delivering vaccinations, and managing more than 170,000 gallons of biohazardous waste [7]. ## The Biosafety Inspection Checklist: A Full Template The checklist below is organized into 12 domains. Each item carries an ID, the requirement, and the verification method. Score every item as Conforming, Minor, Major, Critical, or Not Applicable, and capture evidence for anything not Conforming. Items marked Not Applicable are excluded from scoring, not counted as failures. ### 1. Administrative Program and Documentation (ADM) - [ ] **ADM-01.** A written biosafety manual is current, reviewed within the last 12 months, and accessible where staff work. *(Document review)* - [ ] **ADM-02.** Institutional approvals (biosafety committee or IBC) are current for every active protocol involving infectious agents, [recombinant DNA](/blog/guides/recombinant-dna), or human and animal materials. *(Document review)* - [ ] **ADM-03.** A biosafety officer or equivalent responsible person is designated, and contact details are posted in the room. *(Observation)* - [ ] **ADM-04.** Entry signage shows the universal biohazard symbol, containment level, agents or agent classes present, required PPE, and emergency contacts. *(Observation)* - [ ] **ADM-05.** A written procedure for reporting exposures, injuries, and releases is posted, and staff can describe it. *(Interview)* - [ ] **ADM-06.** Prior inspection reports, incidents, and corrective actions are on file with documented closure evidence. *(Document review)* - [ ] **ADM-07.** The agent inventory is current and reconciles with what is physically present. *(Document review plus physical check)* ### 2. Biosafety Risk Assessment (RA) The risk assessment domain tests whether paperwork actually drives practice. Digital tools help here. Standardized documentation platforms for genetically modified organisms now automate part of the biological risk evaluation and maintain a shared, current inventory of parts and strains, replacing inconsistent notebook-based regimes [8]. - [ ] **RA-01.** A documented biosafety risk assessment exists for each agent or procedure group, covering agent hazard, aerosol potential, quantities, and staff exposure routes. *(Document review)* - [ ] **RA-02.** Risk assessments are revisited when the agent, procedure, scale, or staffing changes, and on a defined review cycle. *(Document review)* - [ ] **RA-03.** Assigned practices and containment match the risk assessment, with any deviation justified in writing and approved. *(Document review plus observation)* - [ ] **RA-04.** Bench SOPs reflect the risk assessment, including defined stop points for high-risk manipulations. *(Document review)* - [ ] **RA-05.** Shared equipment (centrifuges, cell sorters, homogenizers) has risk assessments covering cross-contamination between users. *(Document review)* ### 3. Training and Competency (TRN) A durable training program has four moving parts: a needs assessment tied to documented hazards, a training life cycle from onboarding through refreshers, the tools to deliver and record it, and continual improvement [9]. For microbiology biosafety training, the evidence of competency matters as much as the attendance sheet. - [ ] **TRN-01.** Initial biosafety training was completed before independent work with infectious materials, and content matches the agent list. *(Document review)* - [ ] **TRN-02.** Refresher training is current for all staff, including part-time, evening, and weekend users. *(Document review)* - [ ] **TRN-03.** Competency is assessed by direct observation (cabinet technique, spill response, centrifuge loading), not by quiz alone, and reassessed on a schedule. *(Document review plus observation)* - [ ] **TRN-04.** Staff who classify, pack, or sign infectious substance shipments hold current transport training consistent with IATA requirements. One multi-institution survey found that only 1.29% of surveyed institutions offered training on IATA transport regulations, so verify shipper records rather than assuming they exist. *(Document review)* - [ ] **TRN-05.** Training records for any named staff member can be produced within minutes during the inspection. *(Document review)* ### 4. Facility and Engineering Controls (FAC) - [ ] **FAC-01.** Doors close and latch fully and are kept closed. In BSL-3, doors are self-closing and lockable. *(Physical check)* - [ ] **FAC-02.** A handwashing sink is functional and stocked, with hands-free operation preferred. *(Physical check)* - [ ] **FAC-03.** An eyewash is reachable within about 10 seconds of unobstructed travel from the work area, per the ANSI Z358.1 placement convention, and flush tests are documented. *(Physical check plus document review)* - [ ] **FAC-04.** Vacuum lines used for aspiration are protected with HEPA filters and liquid traps containing disinfectant. *(Physical check)* - [ ] **FAC-05.** In BSL-3, room air flows inward, pressure differentials are monitored, and records confirm performance. *(Document review plus physical check)* - [ ] **FAC-06.** Bench tops are impervious, resistant to disinfectants, and sealed. Stools and chairs have non-fabric covers. *(Physical check)* - [ ] **FAC-07.** A pest control program is active, with no evidence of infestation. *(Observation)* ### 5. Biological Safety Cabinets and Primary Equipment (BSC) - [ ] **BSC-01.** Every biological safety cabinet is certified on installation, annually, and after relocation or filter work, with a current sticker. *(Physical check plus document review)* - [ ] **BSC-02.** Cabinets sit away from doors, supply vents, and traffic, and front and rear grilles are unobstructed. *(Physical check)* - [ ] **BSC-03.** Work is performed at least 6 inches inside the sash, materials move clean-to-dirty, and the work surface is not overloaded. *(Observation)* - [ ] **BSC-04.** No open flames are used inside a cabinet. *(Observation)* - [ ] **BSC-05.** Aerosol-generating steps (vortexing, sonication, blending, vigorous mixing) are performed inside the cabinet or in sealed equipment. *(Observation)* - [ ] **BSC-06.** Centrifuges carry sealed rotors or safety cups, are loaded and unloaded inside the cabinet, and have a written breakage response. *(Observation plus document review)* - [ ] **BSC-07.** Incubators, refrigerators, and freezers are clean, labeled, and on temperature logs with alarm response steps. *(Physical check plus document review)* ### 6. Work Practices and PPE (PPE) - [ ] **PPE-01.** Lab coats or gowns, gloves, and eye protection are available, worn correctly, and removed before leaving the laboratory. *(Observation)* - [ ] **PPE-02.** No food, drink, cosmetics, or contact lens handling in the laboratory. *(Observation)* - [ ] **PPE-03.** Hands are washed after handling infectious material and after glove removal. *(Observation)* - [ ] **PPE-04.** Mechanical pipettes or pipetting aids are used. Mouth pipetting does not occur. *(Observation)* - [ ] **PPE-05.** Needles are not recapped, bent, or broken. Sharps go directly into a sharps container at the point of use. *(Observation)* - [ ] **PPE-06.** Work surfaces are decontaminated at least daily and after any spill, using freshly prepared dilute bleach (the common bench convention is a 1:10 dilution of household bleach, mixed the day it is used because free chlorine decays) or an equivalent disinfectant at effective contact time. *(Observation plus interview)* ### 7. Decontamination, Waste, and Sharps (WST) - [ ] **WST-01.** Biohazard bags and containers are labeled, closed before transport, and compatible with the treatment method. *(Physical check)* - [ ] **WST-02.** Sharps containers are puncture resistant, closable, labeled, and replaced before reaching the fill line. *(Physical check)* - [ ] **WST-03.** Autoclave cycles for decontamination run at 121 °C and are validated with biological indicators containing Geobacillus stearothermophilus spores on a documented schedule. *(Document review)* - [ ] **WST-04.** Chemical and radiological waste is segregated from biohazard waste, with current labels and pickup arrangements. *(Physical check)* - [ ] **WST-05.** Treated waste disposal is documented per institutional and municipal requirements. *(Document review)* ### 8. Shipping and Transport (SHP) - [ ] **SHP-01.** Only trained, current staff classify, pack, mark, and sign infectious substance shipments. *(Interview plus document review)* - [ ] **SHP-02.** UN-certified triple packaging (primary receptacle, secondary packaging with absorbent, outer packaging) is in date and undamaged. *(Physical check)* - [ ] **SHP-03.** Shipping paperwork, markings, and labels match the classification (Category A versus Category B). *(Document review)* - [ ] **SHP-04.** Movement between rooms or buildings uses secondary containment and an accompanying spill kit. *(Observation)* ### 9. Inventory, Access, and Biosecurity (SEC) Biosafety protects people from the agents. Biosecurity protects the agents from unauthorized access, loss, or release. Inspections cover both. - [ ] **SEC-01.** Laboratory access is controlled per policy, visitors are escorted and logged, and after-hours access is tracked. *(Observation plus document review)* - [ ] **SEC-02.** The agent inventory reconciles with physical stock, transfers are documented, and unregistered agents are absent. *(Document review plus physical check)* - [ ] **SEC-03.** Where biological select agents and toxins are held, registration, the FBI security risk assessment, and pre-access suitability screening are current, with ongoing personnel evaluation documented. High-containment organizations have gone further, implementing personnel reliability programs built on human performance principles to sustain a culture of responsibility and address insider risk. *(Document review)* - [ ] **SEC-04.** Departing or role-changing staff have documented material transfer or decommissioning steps. *(Document review)* ### 10. Emergency Preparedness and Incident Response (EMG) - [ ] **EMG-01.** A spill kit is stocked, located, and matched to the agents in use. *(Physical check)* - [ ] **EMG-02.** Spill, exposure, and release procedures are posted with current phone numbers. *(Observation)* - [ ] **EMG-03.** Staff can describe the first steps after a spill or exposure without looking them up. *(Interview)* - [ ] **EMG-04.** Incidents from the last 12 months were reported, investigated, and closed with corrective actions. *(Document review)* - [ ] **EMG-05.** Emergency equipment (fire extinguisher, first aid kit, safety shower) is inspected and in date. *(Physical check)* ### 11. Occupational Health and Medical Surveillance (OHS) Occupational health is the domain inspectors most often wave through, and field data suggest it deserves the opposite treatment. In a survey of latent tuberculosis infection among healthcare students in a highly endemic city, non-compliance with tuberculin skin testing exceeded 40% even among people at higher risk of exposure, despite broadly similar biosafety knowledge across respondents [10]. Knowledge on paper is not participation in practice. - [ ] **OHS-01.** Immunizations and serologic verification recommended for the agents in use are offered, documented, and tracked. *(Document review)* - [ ] **OHS-02.** Medical surveillance appropriate to the agents (for example, tuberculosis screening for staff working with Mycobacterium tuberculosis) is active per policy. *(Document review)* - [ ] **OHS-03.** A written post-exposure evaluation pathway exists, including after-hours access, and staff can state the first step. *(Interview plus document review)* - [ ] **OHS-04.** Baseline serum storage or other baseline sampling follows institutional policy where applicable. *(Document review)* ### 12. Cryogenic and Special Storage (CRY) Liquid nitrogen storage carries a hazard that is easy to miss on a walkthrough. Pathogens can survive in liquid nitrogen, and cross-contamination between liquid nitrogen and unprotected samples has been demonstrated experimentally. The preventive standard is to keep sensitive materials in hermetically sealed, shatterproof containers or a secondary enclosure such as a straw-in-straw or double-bag arrangement, and to disinfect cryo-Dewars periodically [11]. - [ ] **CRY-01.** Liquid nitrogen Dewars are on a documented disinfection schedule. *(Document review plus physical check)* - [ ] **CRY-02.** Stored materials sit in sealed, shatterproof primary containers with a secondary enclosure that prevents direct liquid nitrogen contact. *(Physical check)* - [ ] **CRY-03.** Cryogenic PPE (face shield, cryo gloves, apron) is available and used. *(Observation)* - [ ] **CRY-04.** Oxygen depletion monitoring is present where bulk liquid nitrogen is stored, and alarms are tested on a schedule. *(Physical check plus document review)* - [ ] **CRY-05.** Freezer inventory maps are current, and alarm, backup, and failure response plans are documented. *(Document review)* ### What Field Data Suggest Inspections Will Find Expect strong routine habits and weaker systems. In a cross-sectional survey of 81 clinical laboratory professionals, compliance was high for mechanical pipette use (95.1%), handwashing after handling biohazardous material (96.3%), and handwashing after glove removal (98.8%), but notably lower for protective barrier use (61.7%), biosafety training (18.5%), emergency preparedness (34.6%), appropriate immunization (43.2%), and access to a biological safety cabinet (18.5%) [12]. Plan your time accordingly. Hand hygiene and pipetting usually pass quickly, so spend your minutes probing training records, emergency drills, immunization documentation, and whether staff actually have working cabinets. ## How to Conduct a Biosafety Inspection, Step by Step **Step 1. Request documents one to two weeks ahead.** Send the list from the preparation section. Confirm which rooms and containment levels are in scope. **Step 2. Hold an opening meeting.** State the scope, the method (document review, observation, interview, physical check), the severity scale, and the timeline. Ask for a staff escort who can open every storage area. **Step 3. Walk the room in a fixed order.** A consistent order prevents missed items. A workable sequence is entry signage, then benches and cabinets, then sinks and eyewash, then centrifuges and incubators, then storage and cryogenics, then waste, then records. This fixed order is what turns a checklist into a repeatable biosafety inspection checklist format rather than a set of notes. **Step 4. Observe real work.** Watch a complete manipulation, such as decapping blood tubes or loading a centrifuge. Laboratories often state that they follow specific practices, but casual observation does not always support those claims, a gap documented during the SARS response when mundane tasks turned out to deserve the closest scrutiny [1]. Ten minutes of silent observation is worth an hour of questions. **Step 5. Interview with scenario questions.** Ask "show me what you do if 5 mL of culture spills on the bench" or "who do you call at 2 a.m. after a needlestick." Scenario answers expose training gaps that attendance sheets hide. **Step 6. Check equipment and records physically.** Read certification stickers, eyewash test tags, autoclave logs, and temperature logs with your own eyes. Photograph or copy evidence for anything you score below Conforming. **Step 7. Score the checklist.** Mark each item and record evidence. The worked calculation below doubles as a biosafety inspection checklist example you can copy into your own program. First, store each item in a consistent machine-readable structure. This is the biosafety inspection checklist template used in the walkthrough: ```yaml - id: BSC-01 domain: Engineering controls requirement: "Biological safety cabinet certified within the last 12 months" method: physical_check result: conforming evidence: "Certificate dated 2026-03-14, sticker on cabinet" finding: "" corrective_action: "" owner: "" due_date: "" verified_date: "" ``` Each field matters. `id` ties the finding to the report. `method` records how you verified the item. `result` takes one of five values (conforming, minor, major, critical, not_applicable). `evidence` is what a reviewer needs to re-check your judgment six months later. The last five fields stay empty until the corrective action phase. Then compute the score: ```python applicable = 48 # items scored conforming, minor, major, or critical conforming = 39 minor = 6 major = 3 critical = 0 if applicable == 0: raise SystemExit( "No applicable items were scored. " "Check that room and containment level filters are set correctly." ) weighted = conforming + 0.5 * minor score = weighted / applicable * 100 print(f"Weighted conforming items: {weighted}") print(f"Compliance score: {score:.1f}%") print(f"Critical findings: {critical}") ``` Expected output: ``` Weighted conforming items: 42.0 Compliance score: 87.5% Critical findings: 0 ``` **Step 8. Hold a closing meeting.** Read every finding back to the laboratory leadership. Agree on an owner and a due date for each one before you leave the room. Disagreements about facts get resolved here, not in the written report. **Step 9. Write the report.** Use a structured finding log entry for every item scored below Conforming: ```text FINDING LOG ID: 2026-114-07 Location: Room 2.412, Bacteriology Checklist item: WST-03 (autoclave cycle validation) Result: MAJOR Observed: No biological indicator records for the last 6 cycles. Immediate action: Infectious waste routed to the validated load in Room 2.400. Root cause: Weekly spore testing duty was not reassigned after staff turnover. Corrective action: Reassign duty, retrain staff, back-test the next 3 cycles. Owner: Laboratory supervisor Due date: 2026-12-01 Verification: Document recheck at 30 days ``` **Step 10. Verify closure and trend the data.** Re-check each corrective action against evidence, not assurances. Then feed the results back into program reporting so leadership sees inspection activity alongside training and incident data. ### Common Errors and Fixes ![Decision path that asks whether people or containment are at immediate risk, then whether a required control broke down, to set severity.](/article-images/illustrations/biosafety-inspection-checklist-severity-triage.webp) - **Dividing by zero when a room has no applicable items.** Python raises `ZeroDivisionError: division by zero`. Fix it with the guard clause shown in Step 7, and always exclude Not Applicable items from the denominator. - **Broken checklist files.** In PyYAML, inconsistent indentation produces `yaml.scanner.ScannerError: mapping values are not allowed here`. Fix it by indenting exactly two spaces per level and quoting any string that contains a colon. - **Double-counting.** If the counts of conforming, minor, major, critical, and not_applicable items do not sum to the total checklist items, an item was scored twice or skipped. Reconcile the counts before publishing a score. - **Severity drift.** Two inspectors rating the same lapse differently corrupts trending. Fix it with the severity table below and a second-reader review of every Major and Critical finding. ### How to Check Your Result Is Right Re-derive the score by hand for one domain. Confirm every finding has an owner, a due date, and evidence attached. Spot-check two items by re-observing them before you leave the building. If your score for a domain diverges sharply from the previous cycle, look for a checklist or staffing change before celebrating or panicking. ## Scoring, Severity, and the Inspection Report ![Worked calculation of a weighted compliance score from 48 applicable items, 39 conforming, 6 minor and 3 major, giving 87.5 percent.](/article-images/illustrations/biosafety-inspection-checklist-weighted-score.webp) Severity definitions keep scoring consistent across inspectors and cycles. | Severity | Definition | Example finding | Required response | |--|--|--|--| | Critical | Immediate risk to people or containment | Sharps protruding from an overfilled container during active work | Stop the implicated task, correct before work resumes | | Major | Systemic breakdown of a required control | Autoclave validation lapsed for months | Written corrective plan with owner and due date | | Minor | Isolated lapse with low risk | One missing handwashing sign | Correct at the time of inspection where possible | | Observation | Improvement opportunity | Faded entry signage | Note in the report, no deadline | Two scoring options cover most programs. | Scoring option | Formula | Use it when | |--|--|--| | Simple compliance rate | conforming ÷ applicable × 100 | Small labs, quick pass or fail decisions | | Weighted score | (conforming + 0.5 × minor) ÷ applicable × 100 | Standard program reporting and trending | | Domain score | domain conforming ÷ domain applicable × 100 | Targeting training and resources by domain | The report itself needs seven elements: scope and dates, method, findings by severity with evidence, the compliance score, corrective actions with owners and due dates, items verified as closed from prior cycles, and signatures from inspector and laboratory leadership. Any critical finding is reported to the biosafety officer and institutional leadership the same day, regardless of when the full report is issued. ## After the Inspection: Corrective Actions, Verification, and Reporting Up Assign every finding an owner and a due date in the closing meeting, then verify closure with evidence such as a re-run biological indicator record or a photograph of the repaired eyewash tag. Treat corrective actions the way program managers learned to treat pandemic-era workloads: sort them into what must continue immediately, what can be scheduled, and what needs new resources [6]. Verification closes the loop, but reporting is what sustains the program. Capturing inspection, training, and incident data monthly and presenting it through the inputs-activities-outcomes model lets leadership grasp the scope of biosafety work and justify the staffing and budget behind it, which matters because on a good day nothing bad happens and prevention is invisible [5]. Folding inspection results into an enterprise risk management framework strengthens this further, since laboratories where risk management culture is strong also show strong adoption of risk management best practices [13]. Trend findings across rooms and cycles. If the same domain fails in multiple laboratories, the fix is usually a program-level intervention, such as a targeted training module or a purchasing decision, rather than ten separate corrective action plans. ## Common Mistakes and Limitations 1. **Trusting self-reports.** Staff describe the practice they believe they follow. Observation shows what happens on the bench, and the two diverge often enough that an inspection built on interviews alone is not an inspection [1]. 2. **Skipping mundane tasks.** Decapping blood tubes, loading a rotor, and aspirating with a house vacuum seem too routine to fail, and they are precisely where lapses hide [1]. 3. **Inspecting only paperwork.** A complete binder with an untidy cabinet is a worse signal than a thin binder with a clean cabinet, because the binder can be fixed in a week and the cabinet habit took years to form. 4. **Sending a single-hazard inspector.** Biosafety staff who only know infectious agents miss the chemical and radiological hazards sharing the same benches, which is why cross-training against a codified list of core safety knowledge pays off [3]. 5. **No closure verification.** A corrective action without a verification step is a suggestion. Re-check with evidence. 6. **Treating the checklist as the safety program.** The checklist verifies the risk assessment. It does not replace it. If the underlying assessment of agents and manipulations is wrong, a perfectly scored inspection proves nothing. 7. **Ignoring occupational health.** Surveillance and immunization programs quietly decay, and the decay shows up years later as seroconversions rather than findings. 8. **One-size-fits-all severity.** The same missing label is minor in a BSL-2 bacteriology bench and major next to a select agent freezer. Severity follows risk, not the item text. This checklist reflects widely accepted practice for clinical and research microbiology laboratories. Individual institutions carry additional requirements from accreditation bodies, regulators, and their own biosafety committees, and any judgment call on a live finding needs a qualified biosafety professional who has seen the room. ## Frequently Asked Questions ### How often should a biosafety inspection be performed? Most laboratories are inspected at least annually, and higher-containment or higher-risk spaces are inspected more often under institutional or regulatory schedules. The defensible interval comes from your own biosafety risk assessment and program activity data, not from a universal rule. ### What is the difference between a biosafety inspection and a biosafety risk assessment? A biosafety risk assessment decides what containment, practices, and equipment an agent or procedure requires. A biosafety inspection verifies that the laboratory is actually applying those decisions day to day. ### Who can conduct a biosafety inspection? A trained biosafety professional, usually the institutional biosafety officer or a designated reviewer, conducts the inspection. Inspectors should be cross-trained into the other hazard classes present in the laboratory, not biosafety alone. ### What happens if a laboratory fails a biosafety inspection? Findings are documented with a severity level, assigned an owner and a due date, and tracked to verified closure with evidence. A critical finding requires immediate action, up to stopping the implicated task until it is corrected. ### What is the difference between biosafety and biosecurity during an inspection? Biosafety protects people from the agents, and biosecurity protects the agents from unauthorized access, loss, or release. A complete checklist covers both, which is why access control and inventory reconciliation sit alongside cabinet certification and handwashing. ### Do I need a different checklist for BSL-2 and BSL-3 laboratories? The core checklist stays the same, and BSL-3 adds items such as directional airflow, sealed penetrations, and respiratory protection. Mark BSL-2-only items Not Applicable instead of deleting them so results stay comparable across rooms. ### What documents should I request before a biosafety inspection? Request the biosafety manual, current risk assessments and SOPs, training and competency records, equipment certification records, autoclave validation logs, the incident log, and the previous inspection report with corrective action evidence. ### How long does a biosafety inspection take? A single-room BSL-2 inspection commonly fits within a few hours including the opening and closing meetings. Multi-room programs scale with room count, agent inventory, and the number of open findings from previous cycles. ## Sources 1. [Laboratory safety aspects of SARS at Biosafety Level 2.](https://pubmed.ncbi.nlm.nih.gov/15098644/) 2. [Guidelines for safe work practices in human and animal medical diagnostic laboratories. Recommendations of a CDC-convened, Biosafety Blue Ribbon Panel.](https://pubmed.ncbi.nlm.nih.gov/22217667/) 3. [A Means of Codifying Safety Cross-Training Knowledge Expectations for Biosafety Professionals.](https://pubmed.ncbi.nlm.nih.gov/36895578/) 4. [Comparison of Brazilian High- and Maximum-Containment Laboratories Biosafety and Biosecurity Regulations to Legal Frameworks in the United States and Other Countries: Gaps and Opportunities.](https://pubmed.ncbi.nlm.nih.gov/38434103/) 5. [Articulating Biosafety Program Activities in the Context of a Simplified Public Health Logic Model.](https://pubmed.ncbi.nlm.nih.gov/42205887/) 6. [Pivoting the Biosafety Program in Response to COVID-19: Recommendations of Key Services and Tasks to Consider for the Next Pandemic.](https://pubmed.ncbi.nlm.nih.gov/36779201/) 7. [The COVID-19 Pandemic Response: Biosafety Perspectives from a Large Research and Teaching Institution.](https://pubmed.ncbi.nlm.nih.gov/36035499/) 8. [GMOCU: Digital Documentation, Management, and Biological Risk Assessment of Genetic Parts.](https://pubmed.ncbi.nlm.nih.gov/38263723/) 9. [Establishing and Maintaining a Safety Training Program at Scientific Institutions.](https://pubmed.ncbi.nlm.nih.gov/42643102/) 10. [Non-compliance with health surveillance is a matter of Biosafety: a survey of latent tuberculosis infection in a highly endemic setting.](https://pubmed.ncbi.nlm.nih.gov/22021753/) 11. [Biosafety in embryos and semen cryopreservation, storage, management and transport.](https://pubmed.ncbi.nlm.nih.gov/25091919/) 12. [Biosafety Management Practices Among Clinical Laboratory Professionals in Debre Berhan Town Governmental Hospitals, Ethiopia: A Cross-Sectional Study.](https://pubmed.ncbi.nlm.nih.gov/39872910/) 13. [Evaluating the Knowledge, Attitudes and Practices of Medical Laboratory Professionals Towards Implementing Enterprise Risk Management in Harare, Zimbabwe: A Cross-Sectional Study.](https://pubmed.ncbi.nlm.nih.gov/40524718/)