Bacteria are used industry in various
. There are vaccines of
attenuated pathogenic or of
antigens in bacteria. One the
most ancient of bacteria is
fermentation of milk produce yogurt,
cheese curd (even before
knowledge of the of bacteria
these were already
used the making of products).
Some methods antibiotic production
involve . The recombinant DNA
(genetic engineering) allows
industrial production and
of human proteins,
insulin for diabetics, by
mutant bacteria. bacteria can
produce , like methane gas.