Chlamydia is a bacterial infection caused by Chlamydia trachomatis. It was the most common notifiable infection in Australia in 2017, with 100, 775 notified cases in Australia.
The prevalence of chlamydia in Australia is estimated to be 417 /100, 000; however, some subpopulations have higher prevalence rates. The latest figures regarding chlamydia infections in 2018 from the Kirby Annual Surveillance Report reveal:
The age-standardised rate of chlamydia infections for Aboriginal and Torres Strait Islander people was 1193.9/100, 000, compared with 427/100, 000 for non-Indigenous people.
Chlamydia infection rates were 395/100, 000 for males and 442/100, 000 for females. Higher rates in women may be due, in part, to more testing occurring in women.
The majority of notified cases were in the 15-29 year age group and rates are highest in the 20-24 year age group.
Chlamydia can cause lower genital tract pathology (urethritis, cervicitis) and upper genital tract pathology (pelvic inflammatory disease, epidydimo-orchitis) and can infect the pharyngeal, anorectal and conjunctival mucosa. The contribution of oral sex to chlamydia transmission is unclear; routine testing of the oropharynx is not currently recommended in heterosexual people but is now recommended for gay men and other MSM.
Full details of the clinical presentation (when ...
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7.
Australian STI Management Guidelines for use in Primary Care [internet]. Australasian Sexual Health Alliance; 2019. [Updated 2019]. Available from: http://sti.guidelines.org.au/.
Close
10.
Australasian Contract Tracing Guidelines [internet]. Australasian Society for HIV, Viral Hepatitis and Sexual Health Medicine (ASHM), Australian Government, Department of Health; 2021 (under review). Available from: http://contacttracing.ashm.org.au/.
Close
12.
Haggerty C, Gottleib SL, Taylor BD, Low N, Xu F, Ness RB. Risk of sequelae after Chlamydia trachomatis genital infection in women. J Infect Dis. 2010;201(Suppl 2):S134-55.
Close
14.
Templeton D, Jin F, Imrie J, Prestage GP, Donovan B, Cunningham PH, et al. Prevalence, incidence and risk factors for pharyngeal chlamydia in the community based Health in Men (HIM) cohort of homosexual men in Sydney, Australia. Sex Transm Infect. 2008;84(5):361-3.
Close
15.
Bernstein K, Stephens SC, Barry PM, Kohn R, Philip SS, Liska S, et al. Chlamydia trachomatis and Neisseria gonorrhoea transmission from the oropharynx to the urethra among men who have sex with men. Clin Infect Dis. 2009; 49(12):1793-7.
Close
16.
The Royal Australian College of General Practitioners (RACGP). Guidelines for preventive activities in general practice. 9th ed. East Melbourne, Victoria: RACGP; 2018.
Close
18.
Broady, T., Chan, C., Bavinton, B., Mao, L., Molyneux, A., Delhomme, F., Power, C., Fraser, N., Prestage, G., & Holt, M. (2021). Gay Community Periodic Survey: Sydney 2021. Sydney: Centre for Social Research in Health, UNSW Sydney
Close
19.
McDonagh P, Ryder N, McNulty A, Freedman E. Neisseria gonorrhoeae infection in urban Sydney women: prevalence and predictors. Sex Health. 2009;6:241-4.
Close
20.
Field N, Clifton S, Alexander S, Ison CA, Hughes G, Beddows S, et al. Confirmatory assays are essential when using molecular testing for Neisseria gonorrhoea in low-prevalence settings: insights from the third National Survey of Sexual Attitudes and Lifestyles (Natsal-3). Sex Transm Infect. 2015;91(5):338-41.
Close
22.
Cornelisse V. Could saliva be the main driver of gonorrhoea transmission? RACP Quarterly. 2018;March/April:26-7.
Close
23.
McGowin C, Anderson-Smits C. Mycoplasma genitalium: an emerging cause of sexually transmitted disease in women. PLoS Pathog. 2011;7(5):e1001324
Close
27.
Bradshaw C. Vaginal Symptoms. In: Russell D BD, Fairley C, editor. Sexual Health Medicine. East Hawthorn, Victoria: IP Communications; 2005. p. 72-86.
Close
29.
Cunningham A, Taylor R, Taylor J, Marks C, Shaw J, Mindel A. Prevalence of infection with herpes simplex virus types 1 and 2 in Australia: a nationwide population based survey. Sex Transm Infect. 2006;82:164-8.
Close
30.
Corey L, Wald A, Patel R, Sacks SL, Tyring SK, Warren T, et al. Once-daily valacyclovir to reduce the risk of transmission of genital herpes. N Engl J Med. 2004;350(1):11-20.
Close
32.
Chow E, Read T, Wigan R, Donovan B, Chen M, Bradshaw C. Ongoing decline in genital warts among young heterosexuals 7 years after the Australian human papillomavirus (HPV) vaccination programme. Sexually Transmitted Infections. 2015;91(3):214-9.
Close
34.
Koutsky L. Epidemiology of genital human papilloma virus infection. Am J Med. 1997;102(5A):3-8.
Close
40.
Department of Health. Infectious syphilis outbreak. [Internet]. Australian Government; 2019.
Close
43.
Medland N, Chow E, Read T, Ong J, Chen M, Denham I. Incident HIV infection has fallen rapidly in men who have sex with men in Melbourne, Australia (2013-2017) but not in the newly-arrived Asian-born. BMC Infect Dis. 2018;18(1):410.
Close
47.
Australasian Society for HIV, Viral Hepatitis and Sexual Health Medicine (ASHM). A guide for clinicians to discuss Undetectable = Untransmittable (U=U). 2018.
Close
50.
Goller JL, Coombe J, Bourne C, Bateson D, Temple-Smith M, Tomnay J, Vaisey A, Chen MY, O Donnell H, Groos A, Sanci L, Hocking J. Patient-delivered partner therapy for chlamydia in Australia: can it become part of routine care? Sex Health. 2020 Aug;17(4):321-329. doi: 10.1071/SH20024. PMID: 32741430.
Close
53.
NSW Health Education Centre Against Violence (ECAV); Medical and Forensic Management of Adult Sexual Assault. 2nd Ed. 2016.
Close