Detection ofBordetella pertussis by determination of adenylate cyclase activity

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Abstract
The adenylate cyclase activity ofBordetella pertussis in clinical isolates was measured in calmodulin-supplemented Stainer-Scholte broth by the rate of conversion of ATP to cyclic AMP. Analysis of 250 stock strains ofBordetella pertussis showed that measurable adenylate cyclase activity was produced by all strains. In clinical testsBordetella pertussis was isolated from 135 (22 %) of 605 swab samples. Increased adenylate cyclase activity was detected in 124 (92 %) Stainer-Scholte broth cultures of these samples. A total of 475 swabs contained other bacteria or had no growth; only one of the Stainer-Scholte broth cultures of these swab samples contained measurable adenylate cyclase activity. The results indicate that testing for adenylate cyclase activity provides a specific and sensitive means for detectingBordetella pertussis in clinical specimens.