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Though their contributions were made in eras far apart, the
Hippocratics, Galen and Vesalius all shared the same messianism
that still characterizes today's outstanding medical achiever.
Their discoveries were only the beginning of their
contributions. Public demonstrations, the writing of treatises
and books and the teaching of both colleagues and students
became the vehicles for their individual crusades to better the
state of medical care. Among them, like a constantly humanistic
refrain playing softly in the background, the credo of the
ancient Greek physicians prevailed. Nowhere is that principle
more eloquently expressed than in the memorable words found in
Precepts, one of the books of the Hippocratic Corpus: "Where
there is love of humankind, there is also love of the art of
medicine."
If medical theory and practice are based on an ever expanding
body of knowledge handed down from one generation to the next,
it follows that progress will occur only when additions are made
to that knowledge. Although this is true for the most part,
every era sees a few marked departures from the acquired
wisdom--departures somes so radical as to create entirely new
ways of looking at the evidence gleaned from the study of nature
and disease.
The notion that disease originates in cells rather than tissues
or organs, introduced in the mid-19th century by the German
pathologist Rudolf Virchow, brought on just such a radical
change in perspective. So too did the germ theory, based on
British surgeon Joseph Lister's application of Louis Pasteur's
work to prevent wound infections. Each was the result of
thousands of meticulous observations made over many years.
Virchow's studies were done in a university setting; Lister's in
a laboratory that he and his wife set up in the kitchen of their
home, where they worked tirelessly until they were ready to test
their conclusions on a series of patients.
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