“…Antibiotic resistance, and in particular resistance to penicillin, has become an increasing problem in the control of gonorrhoea (Curtis and Wilkinson, 1958;Wigfield, Selkon, and Rich, 1973;Stolz, Zwart, and Michel, 1975). Varying degrees of correlation of decreased susceptibility of Neisseria gonorrhoeae between pairs of antimicrobial agents have been observed (Reyn and Bentzon, 1968;Phillips, Rimmer, Ridley, Lynn, and Warren, 1970;Watko and Brownlow, 1975).…”