Report of first expedition to South America, 1913Members of the expedition: Richard PStrong [and others] . Fig. 1. — Liver. Stained with Scharlach Roth. Showing areas of central Fig. 2. — Liver. Showing area of necrosis. Fatty degeneration of liver cells and phagocytosis. Plate XIIL —Oroya Fever. HISTOLOGICAL STUDIES 49 HiSTOPATHOLOGY We have also been unable to find any accurate report of thehistological changes occurring in Oroya fever, or indeed anj^account of the specific lesions we have observed in the micro-scopical study of the tissues of individuals dying from thisdisease. N


Report of first expedition to South America, 1913Members of the expedition: Richard PStrong [and others] . Fig. 1. — Liver. Stained with Scharlach Roth. Showing areas of central Fig. 2. — Liver. Showing area of necrosis. Fatty degeneration of liver cells and phagocytosis. Plate XIIL —Oroya Fever. HISTOLOGICAL STUDIES 49 HiSTOPATHOLOGY We have also been unable to find any accurate report of thehistological changes occurring in Oroya fever, or indeed anj^account of the specific lesions we have observed in the micro-scopical study of the tissues of individuals dying from thisdisease. Nevertheless, in tissues presented to us in Lima fromOroya fever cases (designated as verruga cases in which therewas no eruption upon the skin), we have sometimes found thesame lesions we have observed in the tissues collected atnecropsy by ourselves. The tendency, by many Peruvianphysicians at least, has been to regard the case coming tonecropsy with no lesions of verruga either upon the skin orinternally, as one of mistaken diagnosis or as one of verrugaperuviana in which death has occurred before the nodularlesions have appeared. The interest in Peru has appearedalmost alway


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