GONORRHOEA U.S.A. The fluorescent antibody (FA) method for the detection of gonorrhoea was first described by Deacon, Peacock, Freeman, and Harris (1959). The results of their studies were: a speciesspecific antigen associated with freshly isolated, inagglutinable gonococcal cultures was recognized; the antigen appeared to possess characteristics similar to Vi antigens of Salmonella typhi or th...