The word "epidemic" here employed is used in its most liberal sense, meaning thereby a certain rather prevalent and fairly general disease in a given district. The origin of most diseases has thus far been ascribed to well-known, partly known, or suspected vegetable or animal micro-organisms.
In spite of the admirable achievements of bacteriology and laboratory methods, there are many things not easily accounted for by our bacteriologic findings alone. For instance, one epidemic of measles is followed by such sequeæ as otitis, pneumonia, bronchitis, pleural effusions, mastoiditis, etc., while after other similar epidemics complications are much less frequent or may even be absent. It becomes a question, so far unanswered, why we have these different manifestations of the same disease.
In Lee County, Iowa, in the southeastern corner of the state, with Fort Madison as a center, we bad in the early months of 1906 a very
WAHRER CF. AN EPIDEMIC OF HEMORRHAGIC NEPHRITIS FOLLOWING SCARLET FEVER. JAMA. 1908;LI(17):1410–1413. doi:10.1001/jama.1908.25410170026001f
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