Estimation of serum L. casei activity

AUTOR(ES)

Chanarin, I.

RESUMO

Measurement of the serum Lactobacillus casei (`folic-acid') activity is widely used as an index of folic-acid deficiency. Present methods of assay result in recovery of about half the active material in normal serum. A modified method of assay is described which gives higher L. casei values and a clearer distinction between the sera of normal subjects and of patients with folic-acid deficiency.

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