What is the function of putrefying bacteria?

Putrefying bacteria is the term used to describe bacteria involved in putrefaction of living matter. Putrefying bacteria turn nitrogen proteins into ammonium compounds. Nitrifying bacteria turn the ammonium compounds into nitrates

Putrefaction is the decomposition of animal proteins, especially by anaerobic microorganisms, described as putrefying bacteria. Decomposition is a more general process. Putrefaction usually results in amines such as putrescine and cadaverine, which have a putrid odor. Material that is subject to putrefaction is called putrescible.