Which of the following practices is critical in ensuring protection from contamination?

Wearing protective clothing is essential for preventing contamination in laboratory animal facilities. Protective clothing serves as a barrier between the technician and potential contaminants, which can include pathogens, allergens, or chemical agents present in the environment. This clothing—such as lab coats, gloves, masks, and shoe covers—helps to ensure that contaminants do not come into direct contact with the skin or personal attire, reducing the risk of exposure. Additionally, wearing such clothing can help prevent the transfer of contaminants from the technician to the animals or research materials, maintaining a sterile environment for experiments.

In contrast, practices like storing materials near waste and leaving uniforms on during breaks can increase the risk of contamination by introducing harmful substances. Working without a schedule can lead to disorganization, potentially compromising hygiene and safety protocols. This highlights the critical role protective clothing plays in upholding health and safety standards in a laboratory setting.