A sample of tissue, body fluids, waste products, or an infective organism taken for analysis, identification, and/or diagnosis. The sample may be prepared for examination under a microscope.
(MSU) a specimen of urine that is subjected to examination for the presence of microorganisms. In order to obtain a specimen that is free of contamination, the periurethral area is cleansed and the patient is requested to discard the initial flow of urine before collecting the specimen in a sterile container.... midstream specimen of urine
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