The history of clinical laboratory work is intertwined with the development of medicine itself. By the end of the 19th century, bacteriology and other medical specialties had developed rapidly, creating demand for full-time laboratory personnel. In the early part of the 20th century, many physicians taught their assistants how to perform some of the laboratory procedures frequently used in their practice. The quality of the work done by these assistants varied greatly, and in the 1930s, an attempt was made to standardize training programs then available for the preparation of medical technologists. Professional societies for these technologists were established because of their important role in medical advancement. Medical and laboratory technologists have become integral to the health care system.
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