This article is about the aqueous solution. For the gas, see hydrogen chloride. Hydrochloric acid is a corrosive, strong mineral acid with many industrial uses. A colorless, highly pungent solution of hydrogen chloride (HCl) in water, when it reacts with an organic base it forms a hydrochloride salt.
Bacteria are intercellular organisms (i.e. they live in-between cells); whereas viruses are intracellular organisms (they infiltrate the host cell and live inside the cell). They change the host cell's genetic material from its normal function to producing the virus itself.
Pathogens are organisms organisms: living entities-ie animals, plants or microorganisms. that cause disease. They include microorganisms such as bacteria, viruses, fungi and protozoa. hepatitis C virus showing DNA enclosed in a protein coat. Viruses are many times smaller than bacteria. They consist of a fragment of genetic material inside a protective protein coat. Viruses cause diseases such as influenza-flu.