The economic importance of bacteria is immense. They harm us on the other side, and benefit others on the other hand. Bacteria is resistant to diseases such as cholera, typhoid etc. After burying the organism, bacteria mixes organic matter with soil. Applying certain bacteria increases the production capacity of rice and wheat.
[Source]
(https://www.twenty20.com/photos/e14fce37-67a7-4e40-8317-2e4146008271)