Article Text

Download PDFPDF
Estimation of serum L. casei activity
  1. I. Chanarin,
  2. Valerie Berry
  1. Medical Research Council Experimental Haematology Research Unit and Department of Haematology, Wright-Fleming Institute of Microbiology, St. Mary's Hospital Medical School, London


    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.

    Statistics from

    Request Permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.