PT - JOURNAL ARTICLE AU - Skinner, A AU - Wise, R TI - A comparison of three rapid methods for the detection of beta-lactamase activity in Haemophilus influenzae. AID - 10.1136/jcp.30.11.1030 DP - 1977 Nov 01 TA - Journal of Clinical Pathology PG - 1030--1032 VI - 30 IP - 11 4099 - http://jcp.bmj.com/content/30/11/1030.short 4100 - http://jcp.bmj.com/content/30/11/1030.full SO - J Clin Pathol1977 Nov 01; 30 AB - Three methods for rapidly detecting beta-lactamase activity in Haemophilus influenzae are compared. The chromogenic cephalosporin method was found to be the most easily performed and the reagents could be stored for up to three weeks. The phenol red method was simple to perform but the iodometric method was more time consuming. All three tests gave identical results.