New epidemiological evidence has shown that enterococci are major infectious agent in chronic bacterial prostatitis.

After an individual becomes infected, the immune system develops antibodies against that infectious agent.

Kuru was shown to have remarkable similarity to scrapie, a disease of sheep and goats caused by an unconventional infectious agent.

They found the carbon dioxide sensitivity was caused by an infectious agent which they named sigma, and was later found to be a rhabdovirus.

Prions are an example of an infectious agent that can survive sterilisation by moist heat, depending on conditions.