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The incidence of sexually transmitted infections among frequently screened sex workers in a decriminalised and regulated system in Melbourne
  1. D M Lee1,2,
  2. A Binger2,
  3. J Hocking1,2,
  4. C K Fairley1,2
  1. 1School of Population Health, Faculty of Medicine, University of Melbourne, Parkville, 3053, Australia
  2. 2Melbourne Sexual Health Centre, 580 Swanston Street, Carlton, 3053, Australia
  1. Correspondence to:
 Professor Christopher K Fairley
 Melbourne Sexual Health Centre, 580 Swanston Street, Carlton, Victoria 3050, Australia;


Objective: To determine the incidence of sexually transmitted infections (STI) among decriminalised and regulated sex workers in Victoria.

Methods: The incidence of STI was calculated for individuals who attended the Melbourne Sexual Health Centre on more than one occasion. Results of initial screen specimens were not included. Follow up time was calculated in person months and used as the denominator with the number of “specified” STIs diagnosed over the study period as the numerator.

Results: Among 388 sex workers the incidence of chlamydia, Trichomonas vaginalis, genital warts, and herpes was 0.61, 0.11, 0.79, and 0.17, respectively, per 100 person months of follow up. The mean number of sexual non-paying private partners in the past 3 months was significantly greater among those with chlamydia (0.8 v 1.5, p<0.01) and any STI (0.7 v 1.2, p<0.05).

Conclusion: The incidence of STIs was low among decriminalised and regulated sex work and most infections were related to partners outside of work. Frequent screening of sex workers will reduce the chance of workers passing on an STI but is expensive. However, it may also discourage women from joining the sex work system and push them into an illegal system with a worse outcome.

  • CT, Chlamydia trachomatis
  • MSHC, Melbourne Sexual Health Centre
  • NG, Neisseria gonorrhoeae
  • STI, sexually transmitted infections
  • TV, Trichomonas vaginalis
  • sex workers
  • sexually transmitted infections

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  • Competing interest: None declared by all contributors.

  • Ethics approval: None required. The National Health and Medical Research Council (NHMR&C Australia) ethical guidelines and conduct were stringently followed.