1. 1  Sometimes, gimbal. a contrivance, consisting of a ring or base on an axis, that permits an object, as a ship's compass, mounted in or on it to tilt freely in any direction, in effect suspending the object so that it will remain horizontal even when its support is tipped.
Phage typing is a method used for detecting single strains of bacteria. It is used to trace the source of outbreaks of infections. The viruses that infect bacteria are called bacteriophages (phages for short) and some of these can only infect a single strain of bacteria. These phages are used to identify different strains of bacteria within a single species. A culture of the strain is grown in the agar and dried. A grid is drawn on the base of the petri dish to mark out different regions. Inoculation of each square of the grid is done by a different phage.
A phage is a virus that attacks bacteria. Phages are among the best known of viruses because of the ease of studying bacterial systems.Many phages are among the most structurally complex viruses known. The T2 phage is typical one common group of phages.The body of the virus, called a capsid, is a complex structure with a head containing DNA and a tail apparatus that attaches to receptors on the surface of the bacterial host.T2 and all the other T phages that attack E. coli have a lytic life cycle.he body of the virus, called a capsid, is a complex structure with a head containing DNA and a tail apparatus that attaches to receptors on the surface of the bacterial host. T2 and all the other T phages that attack E. coli have a lytic life cycle.