1. Chopra I & Roberts M (2001) Tetracycline antibiotics: mode of action, applications, molecular biology, and epidemiology of bacterial resistance. Microbiol Mol Biol Rev 65: 232â260.
2. Fenton KA & Lowndes CM (2004) Recent trends in the epidemiology of sexually transmitted infections in the European Union. Sex Transm Infect 80: 255â263.
3. Gascoyne-Binzi DM , Hawkey PM & Heritage J (1992) Worldwide distribution of high level tetracycline-resistant Neisseria gonorrhoeae. Genitourin Med 68: 277â278.