RT Journal Article SR Electronic T1 Plasminogen assay by a haemagglutination inhibition technique JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 136 OP 142 DO 10.1136/jcp.24.2.136 VO 24 IS 2 A1 Ludlam, C. A. A1 Das, P. C. YR 1971 UL http://jcp.bmj.com/content/24/2/136.abstract AB Formaldehyde or gluteraldehyde cells treated with tannic acid were coated with plasminogen. These cells are agglutinated by plasminogen antiserum and this reaction can be quantitatively inhibited by purified plasminogen, plasma, and euglobulin. Correlation between this haemagglutination assay and a caseinolytic method is good. The sensitivity of the technique is high and compares favourably with other immunological methods and is approximately 10 times more sensitive than caseinolytic assays. The merits of this type of assay are discussed.