SCREENING TEST OF ANIMAL SERA FOR THE CULTIVATION OF LEPTOSPIRES.
The nutritive value of 8 kinds of animal's sera for the growth of Leptospires was studied by a screening method and compared with that of rabbit serum. The sera of dairy cattle and goats were higher than rabbit serum in average growth number, and thus gave great value for the cultivation of Leptospires. In eight kinds of animals other than dairy cattle, the growth promoting action of the pooled sera for Leptospires were lower than that of the individual sera of the same kind of animals. The serum which is to be added to the medium for the cultivation of Leptospires should be tested by a screening test for the absence of growth inhibitory action against Leptospires, no matter from what kind of animal the serum originated.
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