Microbes can be any organisms which are smaller in size and that are invisible to the naked eyes since the size is 0.1 millimeter or maybe less than that We can only see them under the microscope The inhabitants in soil and all types of water and almost are present everywhere including the air the dust particles outside of a body etc Microbes can come under various groups of organisms such as bacteria protozoa fungi etc Most of the microbes can be grown artificially on a culture media such as Agar Under God they will exist as colony and colony can be seen without the microscope with our naked eyes, we have mostly studied microorganisms with respect of infection and as a causative agent of various diseases but there are some microorganisms which can be beneficial to the human and they can help human to acquire or to produce very useful and indeed important products which can be used for the personal use of human In this chapter we are going to talk about the microorganisms w...