1 The two problems of uppermost interest in respect to epidemic poliomyelitis are: first, the mode of infection, and second, the nature of the specific microorganism causing the disease. I propose to deal briefly with these two aspects of the subject.
Two views are entertained regarding the mode of infection; according to one the infectious agent of the disease is communicated by personal contact; according to the other, it is conveyed by the stable fly. The differences involved in these two conceptions are fundamental, and hence the practices looking toward prevention of the malady based on them must be wholly different, if they are to achieve the result desired. For that reason it is imperative that the validity of the two doctrines be carefully scrutinized and appraised.
Let us examine first the evidence available bearing on the insect conveyance of the disease. This notion was suggested, in the first place,
FLEXNER S. THE MODE OF INFECTION AND ETIOLOGY OF EPIDEMIC POLIOMYELITIS. Am J Dis Child. 1915;IX(5):353–357. doi:10.1001/archpedi.1915.04100470002001
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