Which of the following is NOT a physiological defense mechanism against infection?

The correct choice identifies "scrubbing" as not being a physiological defense mechanism against infection. To clarify, physiological defense mechanisms are innate biological processes that the body employs to protect itself from pathogens.

Inflammation is a key response that occurs when tissues are damaged or infected; it helps to isolate and eradicate pathogens and initiates the healing process. Fever is another physiological response, often induced by the body as a method to create an inhospitable environment for pathogens, inhibit their growth, and enhance the effectiveness of immune responses. Antibody production is a critical component of the immune system, where specialized proteins are generated to specifically target and neutralize infections.

In contrast, scrubbing does not refer to a biological or physiological response but rather implies a manual cleaning action typically performed to remove contaminants from surfaces or the skin. This action is external and does not constitute a physiological mechanism intrinsic to the body's defense system. It is more appropriate in contexts of hygiene rather than immunology.