Archive image from page 379 of The pathology and differential diagnosis The pathology and differential diagnosis of infectious diseases of animals differentpathology00moorrich Year: 1908 Fig. 91. Blood from kidney shoicing para- sites of Texas fever (Smith). toxylin. As a rule they stain more deeply in preparations made from internal organs than they do in those from the living blood. In the capillaries of the congested organs, the blood cor- puscles contain many more parasites. Smith has noted in one case from 2 to 3 per cent of infected corpuscles in the -p=r\ circulating blood but in cove
Archive image from page 379 of The pathology and differential diagnosis The pathology and differential diagnosis of infectious diseases of animals differentpathology00moorrich Year: 1908 Fig. 91. Blood from kidney shoicing para- sites of Texas fever (Smith). toxylin. As a rule they stain more deeply in preparations made from internal organs than they do in those from the living blood. In the capillaries of the congested organs, the blood cor- puscles contain many more parasites. Smith has noted in one case from 2 to 3 per cent of infected corpuscles in the -p=r\ circulating blood but in cover-glass prep- '''xv-=rik?C arations made at the autopsy quite different results were obtained. In those from the skeletal muscles, blood of the right heart, and blood from the bone marrow (sixth rib) very few infected corpuscles were found ; in the blood from the left heart and lung tissue from 2 to 3 per cent of infected corpuscles ; in the spleen 5 per cent ; in the liver and kidney tissue from 10 to 20 per cent ; and in the hyperemic fringes of the omentum and the heart muscle 50 per cent of the corpuscles were infected. In other cases the blood corpuscles in the capillaries were more and in still others less extensively infected. In the living blood the parasites were pyriform, but in the post-mortem specimens they were more nearly round. In the mild type of the disease from 5 to 50 per cent of the red corpuscles in the circu- lation are infected for a period of from one to five weeks. The parasite is round (coccus form). In the fresh preparations it is seldom seen : rarely it can be detected as a pale spot about in diameter at the periphery of the corpuscle. In stained (alkaline methylene blue) prepara- tions, the parasites appear as round coccus-like bodies from Fig. 92. Cover-glass prep arationfrom kidney'. Cor- puscles sfiocving Piroplas- tna, coccus form (Smith).
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