1887

Abstract

Summary.

Separate groups of mice challenged intravenously with either the blastospore or hyphal forms of the same strain of were examined for comparative mortality rates, organ localisation, and tissue and cellular response to the organisms. Blastospores were more rapidly and consistently fatal to mice than the hyphae. Relatively more hyphal elements than blastospores were initially localised in the lungs but more blastospores than hyphal elements were trapped in the liver. The cells of both forms were more effectively killed in the lungs than in other organs. Blastospores initially found in the kidneys increased rapidly in numbers, but hyphal inocula either grew slowly in the kidneys or were eliminated. After mice were challenged with either hyphae or blastospores the initial inflammatory response in the lungs and liver was predominantly of polymorphonuclear leukocytes, but macrophages were the first inflammatory cells to be seen in kidney sections. Peripheral blood counts showed a leukocytosis in mice of both groups although only blastospores resulted in increased numbers of circulating atypical lymphocytes. The results indicated that lungs may play a more important role than ether reticuloendothelial organs in innate resistance to vascular invasion by either of the morphological forms of . , and macrophages may be crucial to host resistance to renal invasion by this fungus.

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1981-08-01
2022-01-19
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