The grading of commercially bred laboratory animals.
D000818:Animals; D000830:Animals, Laboratory / Q000145:classification*; D001431:Bacteriological Techniques; D007757:Laboratory Infection / Q000517:prevention & control*; D009174:Mycoplasma / Q000302:isolation & purification; D010222:Parainfluenza Virus 1, Human / Q000302:isolation & purification