Greenberg H B, Levine M M, Merson M H, Sack R B, Sack D A, Valdesuso J R, Nalin D, Hoover D, Chanock R M, Kapikian A Z
J Clin Microbiol. 1979 Jan;9(1):60-4. doi: 10.1128/jcm.9.1.60-64.1979.
The development of a solid-phase microtiter radioimmunoassay blocking test to detect serum antibody to Escherichia coli heat-labile enterotoxin is described. The assay is easy to perform and quantitate, and it is sensitive and specific.