What is a function of ventilated cage racks?

Ventilated cage racks serve several crucial functions in a laboratory animal housing environment, with one of their primary roles being to supply HEPA filtered air. This function is vital for maintaining a clean and safe environment for the animals, as HEPA filters effectively remove particulate matter, allergens, and pathogens from the air. By filtering the air that circulates within the cage environments, these racks help protect the health and well-being of both the animals housed within them and the personnel working in proximity to them.

Providing HEPA filtered air also contributes to the overall animal welfare by reducing the risk of airborne contaminants that could lead to respiratory issues or other health complications. Additionally, this function supports the integrity of research by minimizing variables that could impact study outcomes.

The other options do not align with the specific functions of ventilated cage racks. For example, while negative pressure can be beneficial in certain settings for controlling the direction of airflow and containing contaminants, it is just one aspect of ventilation and not the sole function of the racks. Eliminating the need for sterilized bedding is also not a function of such systems, as proper bedding is essential for animal comfort and hygiene. Lastly, unrestricted air exchange can lead to potential contamination and is not a practice promoted in controlled environments; rather