The LEED plaque on a building is a mark of quality and achievement in green building. Leaders across the globe have made LEED the most widely used green building rating system in the world with 1.85 million square feet of construction space certifying every day.
Also known as phage therapy, this method involves the use of a phage to destroy the infective bacteria such as E. coli or salmonella. Bacteriophage is also used in identifying pathogenic bacteria (also called phage typing) in diagnostic laboratories.
Some bacterial viruses (bacteriophages) may undergo lysogeny following infection of host cells. In this case, the viral genome is integrated into host-cell chromosomes, forming a prophage that is replicated along with the host genome.When suitably activated, a prophage enters the lytic cycle (see Figure 6-19).his association is called lysogeny, and the integrated phage DNA is referred to as a prophage (Figure 6-19). Under certain conditions, the prophage DNA is activated, leading to its excision from the host-cell chromosome and entrance into the lytic cycle. Bacterial viruses of this type are called temperate phages.