Cal/OSHA · dir.ca.gov
Program-Based Standards

Aerosol Transmissible Diseases (ATD) Medical Surveillance

Aerosol-transmitted pathogens (TB, measles, varicella, novel respiratory pathogens) threaten healthcare and high-risk-facility workers; this is a California-only standard with no federal equivalent.

Who is covered: Health care facilities (hospitals, skilled nursing, clinics, outpatient medical offices, home health, hospice, paramedic/EMS); high-risk facilities (correctional facilities, homeless shelters, drug-treatment programs); public-health operations (contact tracing, screening); police during transport/detention of suspected ATD cases; laboratories handling aerosol-transmissible pathogens; cadaver-handling operations (pathology labs, medical examiners, coroners, mortuaries); and contaminated air-handling maintenance. Limited exceptions for certain outpatient dental/specialty practices with screening — 8 CCR 5199(a).

Evaluation performed by: PLHCP knowledgeable in occupational TB/ATD evaluation (TB management referrals to a PLHCP knowledgeable in TB diagnosis/treatment)

🩺 Baseline / Pre-Placement

On hire/assignment into an ATD exposure-risk classification — 8 CCR 5199(h)

  • Baseline TB screening/testing for new hires in exposure-risk job classifications (TB skin test or IGRA blood test, per the facility's program) — 8 CCR 5199(h)
  • Vaccines listed in Appendix E (e.g., for susceptible exposed workers) made available at no cost within 10 working days of assignment — 8 CCR 5199(h)(5)
  • Medical-history/screening as part of program enrollment
🕒 Periodic / Routine

Interval-based for exposed employees — NOT result-triggered

Schedule: Annual TB testing/assessment for all exposed employees — 8 CCR 5199(h)(3)

  • Annual TB testing/assessment (symptom screen and/or TB test per program and risk level) for exposed employees — 8 CCR 5199(h)(3)
Abnormal results & exposure-event protocols

Abnormal Results & Exposure-Event Protocols

  • Employee TB test conversion (new positive) 8 CCR 5199(h)(3): Provide a medical evaluation and refer the employee to a PLHCP knowledgeable in the diagnosis/treatment of TB for further evaluation and management. Tests: Medical evaluation of the TB conversion, Referral to a PLHCP knowledgeable in TB diagnosis and treatment, Symptom assessment and chest imaging as clinically indicated by the PLHCP
  • Significant exposure incident / suspected or confirmed ATD case exposure 8 CCR 5199(h)(6): Conduct an exposure analysis within 72 hours; provide a post-exposure MEDICAL EVALUATION within 96 hours of the exposure; report suspected reportable ATD cases to the local health officer; notify other potentially exposed employers within 72 hours. Tests: Exposure incident analysis within 72 hours, Post-exposure medical evaluation within 96 hours, Reporting of suspected case to the local health officer, Notification of other potentially exposed employers within 72 hours, Post-exposure prophylaxis/treatment as recommended by the PLHCP

Reporting Requirements

Who performs the evaluationPLHCP (referrals for TB conversion to a PLHCP knowledgeable in TB diagnosis/treatment) — 8 CCR 5199(h).
Reported to employerEmployer receives the PLHCP's written opinion/recommendation on work status and any work restrictions related to ATD exposure; clinical details remain confidential.
Reported to / for the employeeEmployee informed of TB test results, conversion status, exposure-incident findings, and any need for further evaluation/treatment; copy of the written opinion provided.
Time limitsExposure analysis within 72 hours; post-exposure medical evaluation within 96 hours; suspected-case report to the local health officer; notification of other potentially exposed employers within 72 hours — 8 CCR 5199(h)(6).
RecordkeepingConfidential ATD medical records retained per 8 CCR 3204 (duration of employment plus 30 years); may be combined with the 5193 medical record — 8 CCR 5199(j)(1)(A).

Medical Removal Protection

No MRP. Program is baseline + annual TB surveillance plus event-triggered TB-conversion evaluation and post-exposure response (see abnormal_protocols). Medical records may be combined with the 5193 (bloodborne) medical record — 8 CCR 5199(j)(1)(A) — though the two standards cover non-overlapping disease routes (airborne vs. bloodborne).

How this compares to Federal OSHA: California-only standard. 8 CCR 5199 mandates baseline and ANNUAL TB testing/assessment, TB-conversion medical evaluation/referral, Appendix E vaccination offers, and a structured post-exposure pathway (72-hour exposure analysis, 96-hour post-exposure medical evaluation, local-health-officer reporting). There is NO federal OSHA equivalent — federal airborne-pathogen risk is covered only indirectly via 1910.134 and the General Duty Clause.

Occu-Med handles Aerosol Transmissible Diseases (ATD) surveillance end-to-end

Scheduling, exams, lab panels, physician review, removal/return determinations, and audit-ready recordkeeping — fully compliant with Cal/OSHA requirements.