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Pierre Bretonneau (1778-1862), French physician and epidemiologist. Bretonneau studied medicine in Paris and began working at Tours hospital in 1816. He performed the first tracheotomy for laryngeal diphtheria in 1825. In 1826, he wrote a treatise distinguishing between diphtheria (which he named) and scarlet fever. He also described typhoid fever and stated the germ theory of disease, which later became established largely through Pasteur's work. Photograph taken circa 1860.
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