What screening tests are recommended for individuals who handle food for the public?

Recommended Screening Tests for Food Handlers

Food handlers should undergo screening for Hepatitis B (HBsAg), and ill food handlers with gastroenteritis symptoms should be excluded from work for 48-72 hours after symptom resolution to prevent norovirus transmission.

Core Screening Requirements

Hepatitis B Screening (Mandatory)

The most recent and authoritative guideline explicitly addresses food handler screening. HBsAg (Hepatitis B surface antigen) testing should be performed on all food handlers to prevent transmission 1. This is a strong recommendation from the 2025 EASL guidelines, which specifically lists food handlers among healthcare workers and blood donors as requiring HBsAg screening.

• Test required: HBsAg only (anti-HBc is not required for food handlers specifically)
• Rationale: HBsAg is highly sensitive (detection limit <0.05 IU/ml), well-standardized worldwide, and detects active infection that poses transmission risk 1
• Timing: Pre-employment or as part of routine occupational health screening

Exclusion Protocols for Symptomatic Food Handlers

Ill food handlers must be excluded during acute illness and for 48-72 hours following complete resolution of symptoms 2. This applies particularly to gastroenteritis symptoms that could indicate norovirus or other enteric infections.

Key exclusion principles:

• Exclude during any acute gastrointestinal illness
• Maintain exclusion for 48-72 hours post-symptom resolution
• Asymptomatic food workers who test positive for norovirus should also be excluded 2
• Do not require negative stool results before return to work 2
• Regulatory authority approval may be required for return to work 2

Additional Considerations Based on Historical Evidence

While older research identified other infections among food handlers (parasitic infections, tuberculosis, streptococcal carriage) 3, 4, current guideline-level evidence only specifically mandates Hepatitis B screening 1. The norovirus exclusion protocols are based on outbreak management principles rather than routine screening 2.

Common Pitfalls to Avoid

• Do not perform anti-HBc testing routinely for food handlers—HBsAg alone is sufficient for screening purposes 1
• Do not delay return to work waiting for negative stool cultures after gastroenteritis—this is not recommended 2
• Do not use phenolic compounds or quaternary ammonium products for environmental disinfection during norovirus outbreaks—use sodium hypochlorite (bleach) instead 2

Practical Implementation Algorithm

1. Pre-employment: Screen all new food handlers with HBsAg
2. During employment: Monitor for acute illness, particularly gastroenteritis
3. If symptomatic: Immediately exclude from food handling duties
4. Return to work: After 48-72 hours symptom-free (no testing required)
5. Outbreak situations: Follow enhanced exclusion protocols including potentially exposed asymptomatic workers 2

The evidence strongly supports that sick pay policies that don't penalize ill workers facilitate appropriate exclusion and prevent food handlers from working while infectious 2.