Γκέρχαρντ Αρμάουερ Χάνσεν: Διαφορά μεταξύ των αναθεωρήσεων

Leprosy was regarded as largely [[hereditary]] or otherwise [[miasma theory of disease|miasmic]] in origin. Hansen concluded on the basis of [[Epidemiology|epidemiological]] studies that leprosy was a specific [[disease]] with a specific cause.<ref name=Irgens_1984>{{cite journal |author=Irgens L |title=The discovery of Mycobacterium leprae. A medical achievement in the light of evolving [[scientific method]]s |journal=Am J Dermatopathol |volume=6 |issue=4 |pages=337–43 |year=1984 |pmid=6388392}}</ref> In 1870-71 Hansen travelled to [[Bonn]] and [[Vienna]] to gain the training necessary for him to prove his [[hypothesis]].<ref name="Hansen">{{cite web | url=http://www.whonamedit.com/doctor.cfm/596.html | title=Gerhard Henrik Armauer Hansen | work=whonamedit.com | accessdate=2007-03-22}}</ref> In 1873, as he announced the discovery of ''Mycobacterium leprae'' in the tissues of all sufferers, although he did not identify them as bacteria, and received little support.<ref name=Hansen />

 

 

Hansen remained medical officer for leprosy in Norway and it was through his efforts that the leprosy acts of 1877 and 1885 were passed, leading to a steady decline of the disease in Norway from 1,800 known cases in 1875 to just 575 cases in 1901. His distinguished work was recognized at the International Leprosy Congress held at Bergen in 1909.