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WO years ago we inaugurated in the National Institute of Health a basic study designed to determine the extent of the problem in the United States and to provide information which might aid in outlining a working program for the control of this disease. This study is based on the examination for trichinae of diaphragm material from cases coming to necropsy in hospitals, the cases representing routine hospitalizations unassociated with either clinical or anatomical diagnoses of . Each diaphragm included in this study has been examined by two different methods, the direct microscopic method and the digestion-Baermann method, both of which have been described in detail by Hall and Collins1 and by Nolan and Bozicevich.2 At this writing there has been examined a total of 3,000 diaphragms divided into several different series according to the origin of the material. These various series are, as follows: D. C., 2 U. S. Marine Hospitals, and 4 U. S. Naval Hospitals on the east coast. 2. A random series comprising diaphragms received from 51 hospitals in 19 states, the hospitals being selected purely at random and the diaphragms representing random samplings of cases coming to necropsy in these hospitals. 3. A
American Journal of Public Health – American Public Health Association
Published: Feb 1, 1939
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