What are the vital roles of bacteria?

Bacteria are essential part of our ecosystem.


Lots of bacterias cause illness beside that they have many uses.


A bacteria helps in formation of curd.


Many are used as medicine resources.

What are the vital roles of bacteria?
lets classify them the pathogenic and the unpathogenic ones..





pathogenic ones causes diseases, as the word discribes itself.. so whats the use of them? i believe they were created so ballance out nature by killing big creatures that dont have any natural predators, they make (or force) people to be more hygenic..





non pathogenic ones have many roles in this world. some decompose protien, some make vitamin K inside your body. some even protect their host from diseases caused by the pathogenic ones..
Reply:Genetic engineering (to aid in medicine)


Fermentation (food industry)


Protect you (probiotics in the intestine)