Glass test tube with paper label and cotton wool stopper. Dried culture media in tube. Paper label has lines for recording "Name" and "Date". The tube is one of 50 tubes in the Parke, Davis & Company Culture Media Set (MG.142336.01). German bacteriologist, Robert Koch (1843-1910), used coagulated blood serum to culture Mycobacterium tuberculosis, the bacteria that causes tuberculosis. In diagnostic work, the culture tube was innoculated with a sputum specimen from the patient.
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