Low-cost aerosol exposure system for Guinea pigs

Area of Science:

• Biomedical Engineering
• Laboratory Animal Science
• Infectious Disease Research

Background:

• Safe handling of biohazardous aerosols in research settings is critical.
• Existing methods for exposing laboratory animals to aerosols can be costly and difficult to decontaminate.
• There is a need for affordable, user-friendly apparatus for aerosol exposure studies.

Purpose of the Study:

• To design and test an economical apparatus for safe guinea pig exposure to biohazardous aerosols.
• To develop a system that is easily decontaminated, fits within a biosafety cabinet, and is cost-effective.

Main Methods:

• The apparatus features three sealed chambers within an outer box designed for biosafety cabinets.
• Includes a removable animal housing unit for 4 or 8 guinea pigs.
• Separate aerosol and nebulizer chambers minimize contamination and leakage risks; decontamination via immersion.

Main Results:

• The system was rigorously tested for safety, ergonomics, exposure efficiency, airflow, access, sealing, and size.
• Demonstrated effective and consistent exposure of guinea pigs to bacterial aerosols.
• The apparatus proved to be safe, reliable, and cost-efficient.

Conclusions:

• The developed apparatus provides a safe, effective, and economical solution for guinea pig aerosol exposure.
• Its design facilitates easy decontamination and integration into standard biosafety cabinets.
• This system supports efficient and reproducible research involving biohazardous aerosols.