What is the appropriate immediate management and post‑exposure prophylaxis for a healthcare worker after a needle‑stick injury?

Needle-Stick Injury Management

Immediately wash the wound with soap and water, test the source patient for HBsAg, anti-HCV, and HIV, and initiate HIV post-exposure prophylaxis within 2 hours (up to 72 hours) if the source is HIV-positive or high-risk unknown. 1, 2

Immediate Wound Care

• Wash wounds and skin with soap and water immediately after percutaneous injury 1, 2
• Flush mucous membranes (eyes, mouth) with water if exposed 2
• Do not squeeze or manipulate the wound excessively, as this may increase tissue damage 3

Source Patient Evaluation

• Test the source patient promptly for HBsAg, anti-HCV, and HIV antibody using rapid HIV testing when available 1, 2
• Do not test discarded needles or syringes for virus contamination – results are unreliable and should not guide management 1, 2
• For unknown sources, assess the epidemiologic risk of HBV, HCV, or HIV based on the clinical setting 1

Hepatitis B Post-Exposure Prophylaxis

The approach depends on the healthcare worker's vaccination status and antibody response:

Vaccinated Worker with Documented Immunity

• No treatment required if anti-HBs ≥10 IU/L 2

Vaccinated Worker with Inadequate Response

• Give a single hepatitis B vaccine booster dose if anti-HBs <10 IU/L or unknown 2
• For vaccinated non-responders exposed to HBsAg-positive source: administer HBIG 0.06 mL/kg plus vaccine booster 2

Unvaccinated Worker

• If source is HBsAg-positive: give HBIG 0.06 mL/kg immediately and start hepatitis B vaccine series 2
• If source is HBsAg-negative: start hepatitis B vaccine series only 2
• HBIG is most effective within 24 hours but may be given up to 7 days post-exposure 2

Follow-Up Testing

• Test anti-HBs 1–2 months after the final vaccine dose 1, 2
• Interpretation is unreliable if HBIG was given within 3–4 months 1, 2

Hepatitis C Management

• No antiviral prophylaxis is recommended – hepatitis C immune globulin, interferon, and ribavirin are not indicated 1, 2
• Perform baseline anti-HCV antibody and ALT testing immediately 1, 2
• Repeat anti-HCV and ALT testing at 4–6 months post-exposure 1, 2
• Optional HCV RNA testing at 4–6 weeks can provide earlier diagnosis if desired 1, 2

HIV Post-Exposure Prophylaxis (PEP)

Indications for PEP

• Percutaneous injury from HIV-positive patient 2
• Mucous membrane or non-intact skin exposure to HIV-positive blood 2
• Unknown source in high-risk setting (e.g., needle found in sharps container on HIV ward) 2

When PEP Is NOT Indicated

• Exposure to urine, saliva, tears, sweat, feces, nasal secretions, or vomitus unless visibly bloody 2
• Intact skin contact with blood 2
• Source confirmed HIV-negative 2

PEP Regimen and Timing

• Initiate PEP within 2 hours ideally, but up to 72 hours post-exposure 2, 4
• Basic regimen: Zidovudine 600 mg/day in 2–3 divided doses + Lamivudine 150 mg twice daily (available as Combivir) 1, 2
• Duration: 4 weeks (28 days) 2
• Do not delay PEP while awaiting source-patient test results – start empirically when exposure is high-risk 2

Monitoring During PEP

• Evaluate the worker within 72 hours of starting PEP 1, 2
• Obtain baseline CBC, renal and liver function tests 2
• Repeat toxicity labs at least every 2 weeks during the 4-week course 1, 2
• Monitor for adverse effects through clinical evaluation 1

Follow-Up Testing Schedule

HIV Exposure

• Test at baseline, 6 weeks, 3 months, and 6 months 1, 2
• Test immediately if acute retroviral syndrome symptoms appear (fever, rash, myalgias, lymphadenopathy) 1, 2

HBV Exposure

• Test anti-HBs 1–2 months after final vaccine dose 1, 2

HCV Exposure

• Baseline and 4–6 month anti-HCV and ALT testing 1, 2
• Optional HCV RNA at 4–6 weeks for earlier detection 1, 2

Counseling and Precautions

• Advise exposed workers to seek immediate medical evaluation for any acute illness during the follow-up period 1, 2
• For HIV exposures where PEP is used: employ barrier protection during sexual activity and refrain from blood/tissue donation for 6 months 2
• No special infection-control precautions are needed to prevent secondary transmission after HBV or HCV exposure 2
• Patient-care duties do not need modification after any bloodborne pathogen exposure 2
• Provide emotional support and medication adherence counseling to assist completion of HIV PEP 1

Common Pitfalls to Avoid

• Do not delay HIV PEP while awaiting source test results – the 72-hour window is critical 2, 4
• Do not administer hepatitis C immune globulin or antiviral agents prophylactically – they are not effective 2
• Do not test discarded needles – base management on clinical risk assessment instead 1, 2
• Do not give HBIG alone to unvaccinated workers – always start the vaccine series concurrently 2
• Do not interpret anti-HBs results if HBIG was given within 3–4 months – wait for clearance 1, 2