“…Asymptomatic women harbouring gonococci have been reported by several authors. Eriksson and Wanger (1975), Waters and Roulston (1969), and Pariser and Marino (1970) reported asymptomatic gonococcal infection in 35 3%, 8712%, and 90% of patients respectively. Generally, higher rates of infection have been reported from North American clinics (Charles et al, 1970;Prince et al, 1964;Waters and Roulston, 1969) than in Britain (Thin and Michael, 1970;Silverstone et al, 1974).…”