Laboratory-acquired infections

Area of Science:

• Occupational health and safety in clinical and research laboratories.
• Infectious disease epidemiology and risk assessment.

Background:

• Laboratory-acquired infections (LAIs) pose a significant risk to healthcare and research personnel.
• Common causative agents include bacteria (Brucella, Shigella, Salmonella, Mycobacterium tuberculosis, Neisseria meningitidis), viruses (Hepatitis B, Hepatitis C, HIV), and fungi.

Purpose of the Study:

• To review common and emerging infectious agents responsible for LAIs.
• To highlight the importance of risk assessment for occupational exposure.
• To emphasize the role of physicians in managing exposed laboratory workers and alerting laboratories to high-risk infections.

Main Methods:

• Review of existing literature and surveys on laboratory-acquired infections.
• Discussion of common bacterial, viral, and fungal pathogens.
• Consideration of uncommon agents relevant to bioterrorism preparedness.

Main Results:

• Surveys indicate Brucella, Shigella, Salmonella, Mycobacterium tuberculosis, and Neisseria meningitidis are frequent causes of bacterial LAIs.
• Hepatitis B virus, Hepatitis C virus, and human immunodeficiency virus are the most common viral LAIs.
• Dimorphic fungi are the leading cause of fungal LAIs.

Conclusions:

• Laboratory workers are susceptible to a wide range of infectious agents.
• Physicians must consider occupational acquisition when treating sick laboratory workers and advise on postexposure prophylaxis.
• Early communication between healthcare providers and laboratories is vital for managing potential high-risk exposures.