Microbiology

 Bacteria is a biological cell and unicellular organism that is alive in host and independently.  It is considered that bacteria is the first life format on earth. It can live on earh, in water, biosphere. In our body a vast amount of bacteria exist. The vast amount are in gut and skin. A large number of bacteria exists in our body are benificial. These are called flora.  A specific types of bacteria in nature is harmful. These are pathogenic bacteria. A common example of fetal bacteria is tubercolosis which is responsible to respiratory tract infection. For survibal need of animals and plants bacteria is very important. Only bacteria and some archae can synthesis vitamin B12, cobalamin which is essential for all cell metabolism. Bacteria and archae synthesis B12 vitamin and therefore transfer it in our food chain. In hydrothermal vent, cold seeps, bacteria plays a vital role by converting desolved hydrogen sulphide and methane to energy. Cholera, Anthrax, Syphilis, Lepro...