The Diseases caused by germs and which may infect any part of the body are called Infectious Diseases. They can spread by any means where there is a germ. They are caused by pathogenic microorganisms such as bacteria, virus, parasites and fungi. Germs can be spread by direct or indirect contact. Vaccination, maintenance of proper hygiene and medicines help in the prevention of infections. Infection is the growth of an organism’s body tissue by disease causing agents, their growth and the reaction of host tissue to the infectious agents and the toxins they produce. Infectious disease, also known as transmissible disease is illness resulting from infections