Andrew Lau1, Fabian Y S Kong1, Christopher K Fairley2, David J Templeton3, Janaki Amin4, Mark A Boyd5, Catriona Bradshaw2, Marcus Y Chen2, Basil Donovan6, Carole Khaw7, David A Lewis8, Anna McNulty9, David G Regan6, Mahesh Ratnayake7, Jane S Hocking10. 1. From the Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne. 2. Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria. 3. Department of Sexual Health Medicine, Sydney Local Health District and Sydney Medical School, The University of Sydney. 4. Department of Health Systems and Populations, Macquarie University, Sydney, New South Wales. 5. Adelaide Medical School, University of Adelaide, Lyell McEwin Hospital, Elizabeth Vale, South Australia. 6. The Kirby Institute, The University of New South Wales, Sydney, New South Wales. 7. Adelaide Sexual Health Centre, Adelaide, South Australia. 8. Western Sydney Sexual Health Centre, Parramatta. 9. Sydney Sexual Health Clinic, Sydney, New South Wales. 10. Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Carlton, Victoria, Australia.
Abstract
BACKGROUND: The resumption of sexual activity shortly after commencing treatment for sexually transmitted infections (STIs) is poorly described despite contributing to onward transmission. With azithromycin remaining an option for rectal Chlamydia trachomatis, resuming sex too early after treatment may contribute to antimicrobial resistance because of exposure of newly acquired STIs to subinhibitory concentrations. METHODS: Clinical and sexual behavioral data were collected from men participating in a trial assessing treatment efficacy for rectal chlamydia. Data were collected at recruitment and weekly for 3 weeks after commencing treatment. Outcome measures were resumption of any sexual activity or condomless receptive anal sex within 1, 2, or 3 weeks after commencing treatment. Generalized linear regression was used to calculate adjusted risk ratios (aRR) to identify associated factors. RESULTS: Almost 1 in 10 men (9.5%; 95% confidence interval [CI], 7.2-12.1) resumed condomless receptive anal sex within 1 week of commencing treatment. This was associated with current preexposure prophylaxis use (aRR, 3.4; 95% CI, 2.5-4.8]) and having 9 or more sexual partners in the last 3 months (aRR, 3.2; 95% CI, 1.6-5.0). Most men (75.0%; 95% CI, 71.3-78.5) resumed any sexual activity within 3 weeks; this was associated with a greater number of sexual partners (4-8 partners; aRR, 1.2; 95% CI, 1.1-1.5; ≥9 partners; aRR, 1.5; 95% CI, 1.3-1.7). CONCLUSIONS: Resuming condomless receptive anal sex early after treatment may facilitate onward transmission and promote antimicrobial resistance for STIs. Although azithromycin remains a treatment option, this analysis highlights the need for new health promotion messages regarding early resumption of sex and continued surveillance for antimicrobial resistance.
BACKGROUND: The resumption of sexual activity shortly after commencing treatment for sexually transmitted infections (STIs) is poorly described despite contributing to onward transmission. With azithromycin remaining an option for rectal Chlamydia trachomatis, resuming sex too early after treatment may contribute to antimicrobial resistance because of exposure of newly acquired STIs to subinhibitory concentrations. METHODS: Clinical and sexual behavioral data were collected from men participating in a trial assessing treatment efficacy for rectal chlamydia. Data were collected at recruitment and weekly for 3 weeks after commencing treatment. Outcome measures were resumption of any sexual activity or condomless receptive anal sex within 1, 2, or 3 weeks after commencing treatment. Generalized linear regression was used to calculate adjusted risk ratios (aRR) to identify associated factors. RESULTS: Almost 1 in 10 men (9.5%; 95% confidence interval [CI], 7.2-12.1) resumed condomless receptive anal sex within 1 week of commencing treatment. This was associated with current preexposure prophylaxis use (aRR, 3.4; 95% CI, 2.5-4.8]) and having 9 or more sexual partners in the last 3 months (aRR, 3.2; 95% CI, 1.6-5.0). Most men (75.0%; 95% CI, 71.3-78.5) resumed any sexual activity within 3 weeks; this was associated with a greater number of sexual partners (4-8 partners; aRR, 1.2; 95% CI, 1.1-1.5; ≥9 partners; aRR, 1.5; 95% CI, 1.3-1.7). CONCLUSIONS: Resuming condomless receptive anal sex early after treatment may facilitate onward transmission and promote antimicrobial resistance for STIs. Although azithromycin remains a treatment option, this analysis highlights the need for new health promotion messages regarding early resumption of sex and continued surveillance for antimicrobial resistance.
Authors: Eric P F Chow; Kate Maddaford; Jane S Hocking; Catriona S Bradshaw; Rebecca Wigan; Marcus Y Chen; Benjamin P Howden; Deborah A Williamson; Christopher K Fairley Journal: Sci Rep Date: 2020-11-09 Impact factor: 4.379