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Many investigators have shown that immunological techniques are useful for the clinical diagnosis of human aspergillosis, and some investigators have described the preparation of antigens for skin and precipitation tests [S. B.

Rabbit serum is the most important constituent in culture media for the growth of pathogenic leptospires. Many reports have shown that fatty acid or lipid fractions supported the growth of leptospires in place of rabbit serum [I. Mifuchi and T.

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