The exocrine glands release their numerous secretions to the outside of the body. Examples of exocrine products would be saliva,sweat and mucous.
I think the best medium is agar. It is a jelly-like substance that is obtained from algae, and is used to culture small organisms such as microorganisms and bacteria.
Hope this helps. :)
Chemicals produced by bacteria that limit the growth of other bacteria are called antibiotics.