Abstract
A NUMBER of pathogenic protozoa of the blood, for example, those which invade erythrocytes and lead essentially an intracellular existence such as the malaria parasites and others like the trypanosomes which are actively motile in the blood stream, have been successfully preserved in the frozen state retaining both their viability and infectivity.
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MOST, H., ALGER, N. & YOELI, M. Preservation of Leishmania donovaniby Low-temperature Freezing. Nature 201, 735–736 (1964). https://doi.org/10.1038/201735a0
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DOI: https://doi.org/10.1038/201735a0
