[Occupational exposure to prions due to contact with meat and bone meal (MBM)]

Area of Science:

• Veterinary Science
• Prion Disease Research
• Occupational Health

Background:

• Meat and bone meal (MBM) is a potential source of prions, the infectious agents responsible for transmissible spongiform encephalopathies (TSEs) in humans and animals.
• Prion diseases are characterized by progressive neurodegeneration and are a significant public health concern.

Purpose of the Study:

• To evaluate the risk of prion exposure associated with Meat and bone meal (MBM) production and handling.
• To assess the effectiveness of current MBM production methods in prion inactivation.
• To identify occupational groups at higher risk of prion exposure.

Main Methods:

• Review of existing literature on prion diseases and MBM production.
• Analysis of occupational exposure scenarios in MBM-related industries.
• Expert opinion assessment of risk levels.

Main Results:

• Optimal MBM production methods significantly reduce prion presence but cannot guarantee complete elimination.
• Occupational groups in MBM production, fertilizer/fodder plants, power stations, storage, distribution, and transport face higher exposure risks.
• The expert-assessed risk of prion infection for workers handling MBM is considered very low and acceptable.

Conclusions:

• While MBM production methods mitigate prion risks, residual risk necessitates continued vigilance.
• Guidelines for preventing and reducing occupational contact with MBM have been developed.
• The low, acceptable risk level suggests current safety measures are adequate for managing MBM-related prion exposure.