Antimicrobial tests are used to determine which specific antibiotics a particular bacteria or fungus is sensitive to .
Principle : It measures the ability of an antibiotic or other antimicrobial agent to inhibit bacterial growth in vitro. The ability may be estimated by either the dilution method or the diffusion method.
Invitro antimicrobial susceptibility testing can be performed using a variety of formats , the most common being, disk diffusion, agar dilution, broth macrodilution , broth microdilution and a concentration gradient test.
It is usually ordered at the same time as a culture of a potentially infected site such as a wound, urine or blood culture . However , the test will usually only be performed when the culture is positive for one or more pathogens .
Susceptibility testing is usually ordered at the same time as a culture of a potentially infected site , such as a wound , urine or blood culture . However , the test will usually only be performed when the culture is positive for one or more pathogens .
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