Hi Naveena,
M.Sc. Microbiology is a branch of biology through which ones comes to know about Mycology, Bacteriology, Virology, etc
Eligibility : Candidate must possess a B.Sc. degree qith atleast two subjects combination of home science, human genetics, nutrition and dietetics, botany, zoology, biochemistry, biotechnology, plant protection, microbiology, dairy sciences, agriculture and horticulture, home science, fisheries and public health from any recognized university or equivalent.
Most of the colleges take Entrance exam for admission to the same program.
If you want to know about any specific college then let us know.
Hope it helps :)