Angina pectoris, commonly known as angina, is the sensation of chest pain, pressure, or squeezing, often due to ischemia of the heart muscle from obstruction or spasm of the coronary arteries.
Pure Culture. A pure culture is a population of cells or multicellular organisms growing in the absence of other species or types.
A pure culture of bacteria recovered from diseased tissue is artificially inoculated into the same or related cultivar or another susceptible host species, in an effort to reproduce the same disease symptoms.