Apparently, there are some people who think that Colloidal Silver (liquid suspension of microscopic particles of silver) can be used in replacement of antibiotics. This dates back prior to 1938 when colloidal silver was widely considered a cure-all. Use of colloidal silver was primarily discontinued after 1938 due to the lower price and increased availability of antibiotics.

In 1999, the FDA banned marketing colloidal silver as medicine, “Noting that such products were being marketed for numerous diseases without evidence of effectiveness.”

In 2002, the Australian Therapeutic Goods Administration (TGA) found that there
were no legitimate medical uses for colloidal silver and no evidence to support
its marketing claims.

Unfortunately, the 2002 study was too late for Stan Jones. Jones is a Libertarian Politician (word used loosely; 2 unsuccessful runs for Montana Senate and 2 unsuccessful runs for Montana Governor) who heavily used colloidal silver prior to Y2K believing post 2000, antibiotics would no longer be available. Well, this use caused a condition called Argyria, which causes your skin to permanently become blue or blueish-grey.

Source: Wiki, wiki, wiki