3.3 Infection Control, Bloodborne Pathogens & Post-Exposure Prophylaxis

Infection Control, Bloodborne Pathogens & Post-Exposure Prophylaxis

Quick Answer: Occupational infection control standardizes workplace pathogen containment through compliance with the OSHA Bloodborne Pathogens Standard (29 CFR 1910.1030), mandatory written Exposure Control Plans (ECP), implementation of safety-engineered needle devices, and employer-funded Hepatitis B vaccination offered within 10 working days of initial assignment. Following percutaneous or mucocutaneous exposure, the occupational health nurse (OHN) must execute rapid Post-Exposure Prophylaxis (PEP) protocols—initiating HIV PEP ideally within 2 hours (and no later than 72 hours) for 28 days, administering Hepatitis B Immune Globulin (HBIG) and vaccine for susceptible individuals, and applying tailored transmission-based isolation precautions (Standard, Contact, Droplet, Airborne) in clinic operations.

Occupational health nurses manage infection control across healthcare systems, industrial plants, laboratory facilities, and commercial workplaces. Preventing occupational transmission of bloodborne and airborne pathogens requires strict adherence to federal standards, rigorous engineering controls, immediate post-exposure clinical management, and proper isolation measures.

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The OSHA Bloodborne Pathogens Standard (29 CFR 1910.1030)

The OSHA Bloodborne Pathogens (BBP) Standard protects employees from exposure to blood and other potentially infectious materials (OPIM). OPIM includes human body fluids such as semen, vaginal secretions, cerebrospinal fluid, synovial fluid, pleural fluid, pericardial fluid, peritoneal fluid, amniotic fluid, saliva in dental procedures, and any body fluid visibly contaminated with blood.

                  ┌──────────────────────────────────────────────┐
                  │        Written Exposure Control Plan         │
                  │   Annual Review & Frontline Worker Input     │
                  └──────────────────────┬───────────────────────┘
                                         │
                 ┌───────────────────────┴───────────────────────┐
                 │                                               │
                 ▼                                               ▼
     Engineering Controls                            Work Practice Controls
(Safety needles, sharps boxes)                 (No recapping, hand hygiene)
                 │                                               │
                 └───────────────────────┬───────────────────────┘
                                         │
                                         ▼
                             Personal Protective Equipment
                              (Gloves, Gowns, N95, Eye)

Key Regulatory Requirements

1. Written Exposure Control Plan (ECP): Employers must maintain a written, site-specific ECP identifying all job classifications with occupational exposure risk. The ECP must be reviewed and updated at least annually and whenever new tasks or procedures alter exposure risk.
2. Frontline Worker Input: Under the Needlestick Safety and Prevention Act, employers must solicit non-managerial, frontline healthcare workers involved in direct patient care to evaluate and select safety-engineered sharps devices.
3. Sharps Injury Log: Employers must maintain a confidential Sharps Injury Log recording the type and brand of device involved, department/location of incident, and detailed description of the exposure event.
4. Hierarchy of Controls Implementation:
   • Engineering Controls: Primary defense mechanism. Includes safety-engineered needles (sheathed, sliding-shield, or retractable needles), needleless IV sets, and rigid, leak-proof, puncture-resistant sharps disposal containers placed at eye level and immediately accessible at the point of use.
   • Work Practice Controls: Altering how tasks are performed. Prohibiting needle recapping (if recapping is unavoidable, mandating a one-handed scoop technique); prohibiting bending, shearing, or breaking contaminated needles; mandating immediate handwashing following glove removal; and strictly banning eating, drinking, smoking, applying cosmetics, or storing food in contaminated work areas.
   • Personal Protective Equipment (PPE): Provided at no cost to workers. Includes gloves, gowns, fluid-resistant laboratory coats, masks, goggles, and full-face shields based on anticipated blood or body fluid contact.

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Hepatitis B Vaccination Requirements

Under 29 CFR 1910.1030, the Hepatitis B virus (HBV) vaccine series must be offered to all employees who have potential occupational exposure to blood or OPIM.

• Timing & Cost: Offered at no cost to the employee, at a reasonable time and place, within 10 working days of initial assignment to a job duty with exposure risk.
• Pre-Vaccination Requirements: Employers cannot require pre-vaccination serological screening as a prerequisite for receiving the vaccine.
• Mandatory Declination Form: Employees who decline the HBV vaccination must sign the official OSHA Mandatory Hepatitis B Vaccine Declination Form. If an employee signs the declination but later decides to accept the vaccination while still covered under the standard, the employer must provide the vaccine series at no cost within 10 working days.
• Post-Vaccination Serology: Post-vaccination serologic testing for antibody to Hepatitis B surface antigen (Anti-HBs) must be performed 1 to 2 months following completion of the 3-dose vaccine series to verify immunity. An Anti-HBs titer of $\ge 10\text{ mIU/mL}$ confirms adequate protection.

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Post-Exposure Prophylaxis (PEP) Protocols

When a worker sustains a percutaneous injury (needlestick, cut), mucocutaneous exposure (splash to eyes, nose, mouth), or non-intact skin exposure to blood or OPIM, the OHN must immediately initiate the emergency post-exposure protocol.

1. Immediate Exposure Site Management

• Percutaneous Injuries / Cuts: Wash the wound immediately with soap and water for several minutes. Do NOT squeeze, puncture, or express blood from the wound site. Do NOT apply caustic chemical agents, bleach, or antiseptic scrubs (such as povidone-iodine), which can cause tissue destruction and increase viral penetration.
• Mucous Membrane Splashes: Flush eyes, nose, or mouth thoroughly with generous amounts of water or sterile normal saline for 15 minutes.

2. Risk Assessment and Source / Worker Baseline Testing

• Source Patient Testing: Seek consent and immediately test the source patient for HIV antibody/antigen, Hepatitis B surface antigen (HBsAg), and Hepatitis C antibody (Anti-HCV).
• Exposed Worker Baseline Testing: Immediately obtain baseline blood samples from the worker for HIV antibody/antigen, Anti-HBs, Anti-HCV, and baseline liver function tests (ALT).

3. Pathogen-Specific Post-Exposure Management Protocols

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Infection Control Precautions in Occupational Health Operations

Occupational health clinics must apply appropriate isolation precautions to prevent horizontal transmission of infectious agents among staff and visiting workers.

Standard Precautions (All Patients: Hand hygiene, gloves, respiratory etiquette)
   ├── Contact Precautions (Gown + Gloves for MRSA, VRE, C. diff, scabies)
   ├── Droplet Precautions (Surgical Mask for Flu, Pertussis, Meningococcus)
   └── Airborne Precautions (N95 + AIIR Negative Pressure for TB, Measles, Varicella)

1. Standard Precautions

Applied to all patients in all healthcare settings, regardless of suspected or confirmed infection status.

• Components: Rigorous hand hygiene (alcohol-based hand rub or soap and water); wearing gloves when handling blood, body fluids, or non-intact skin; wearing masks, eye protection, and gowns during procedures likely to generate splashes; respiratory hygiene/cough etiquette; and safe injection practices.

2. Contact Precautions

Prevent transmission of infectious agents spread by direct or indirect contact with the patient or patient's environment (e.g., MRSA, VRE, Clostridioides difficile, scabies).

• Requirements: Private exam room; staff don clean gown and gloves upon room entry; dedicated patient care equipment (stethoscope, blood pressure cuff); mandatory soap and water handwashing for C. difficile spores.

3. Droplet Precautions

Prevent transmission of pathogens spread through close respiratory or mucous membrane contact with large respiratory droplets ($>5\text{ }\mu\text{m}$) generated by coughing, sneezing, or talking (e.g., Influenza, Pertussis, Neisseria meningitidis).

• Requirements: Private room; staff wear a surgical mask upon entering the room; patient wears a surgical mask during transport; physical separation of at least 3–6 feet.

4. Airborne Precautions

Prevent transmission of infectious agents that remain infectious over long distances and time when suspended in the air as small droplet nuclei ($\le 5\text{ }\mu\text{m}$) (e.g., Mycobacterium tuberculosis, Measles, Varicella/Chickenpox, SARS-CoV-2 during aerosol-generating procedures).

• Requirements: Placement in an Airborne Infection Isolation Room (AIIR) with negative pressure relative to surrounding areas, a minimum of 12 air changes per hour (ACH), and direct external exhaust filtering through HEPA filters.
• Personal Respiratory Protection: Staff must wear a fit-tested N95 filtering facepiece respirator or higher level of protection (e.g., Powered Air-Purifying Respirator / PAPR) prior to entering the room. Patient must wear a surgical mask during transport.