RT Journal Article SR Electronic T1 Evaluation of the coagglutination test for the identification of Neisseria gonorrhoeae in primary cultures. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 315 OP 319 DO 10.1136/sti.57.5.315 VO 57 IS 5 A1 Johnston, N A YR 1981 UL http://sti.bmj.com/content/57/5/315.abstract AB The coagglutination (COA) test for the identification of Neisseria gonorrhoeae was compared with immunofluorescence and sugar degradation tests on 1710 gonococcal isolates, 72 of which produce beta-lactamase. The COA test gave a positive result for 98.6% of the strains. Treatment of suspensions with Streptomyces enzyme reduced the incidence of inconclusive results due to autoagglutination to 1.2%. Cross-reactivity of the gonococcal antiserum was minimised by absorption with meningococci and Moraxella species. The COA provide a simple, quick, and reliable method for identifying N gonorrhoeae in culture.