Blood, 1960, Vol. 15, No. 2, pp. 228-235.
© 1960 American Society of Hematology, Inc.
The Measurement of Folic Acid Activity in Serum:
A Diagnostic Aid in the Differentiation of
the Megaloblastic Anemias
VICTOR HERBERT 1,
HERMAN BAKER 1,
OSCAR FRANK 1,
INEZ PASHER 1,
HARRY SOBOTKA 1,
LOUIS R. WASSERMAN 1,
Hazel Weill 1, and
Lee Bandel 1
1 Departments of Hematology and Chemistry, The Mount Sinai Hospital, New
York, N. Y.
A modified L. casei microbiologic assay for the "folic acid" content of fasting
serum appears to reflect the presence or absence of folic acid deficiency in
patients with megaloblastic anemia of various causes.
Advantages of this assay method for fasting serum "folic acid" level over
other procedures presently in use for evaluating possible folic acid deficiency
are discussed.
Submitted on May 25, 1959
Accepted on July 11, 1959