Today we will discuss different types of HIV and Syphilis antibody testing performed at home by the patient or consumer. Home testing for HIV and Syphilis empower people, especially pregnant women who live in remote areas or are marginalised and hard to reach, to screen themselves for these two serious and communicable infections at home and seek additional confirmitory testing, treatment and support if their screening test is reactive. We will discuss what these tests are, how they can be used as well as review their merits and potential risks.

Host: Dr Fabiola Martin, Sexual Health Specialist, Associate Professor at Australian National University

Guest: Dr Bobbie Van Der Pol, Professor of Medicine and Public Health at the University of Alabama at Birmingham, the Director of the UAB STD Diagnostics Laboratory and President of the International Society for STD Research.

Today we will discuss if screening asymptomatic Men who have sex with Men, also referred to as MSM, who are receiving HIV pre-exposure anti-retroviral medication, called HIV PrEP, routinely for bacterial STIs, gonorrhoea and chlamydia through pharyngeal, urine and rectal PCR testing every three months- also referred to as 3x3 testing is indeed of benefit or may cause harm. This year, in Lancet HIV, the Gonoscreen trial, a randomised controlled trial, of 500 MSM on PrEP in each arm followed up for 12 months reported that 3x 3 testing does not reduce the incidence of gonorrhoea and chlamydia infections in this specific cohort. In Belgium, this trial has led to a change in clinic practice through the Belgium HIV PrEP guidelines where patients will be screened less frequently and intensely. Lancet ID on the other hand published an opinion piece by Raccagni et al where concerns about transmission and morbidity risk of untreated infection and implications of using poor quality screening tools are voiced. We will discuss today the merit of the Gonoscreen trial and other studies that support a decrease in screening & treating asymptomatic bacterial STIs and exercising stricter antimicrobial stewardship versus the risks associated with leaving asymptomatic infections untreated and risking morbidity and transmission.

Relevant links:

Effect of screening for Neisseria gonorrhoeae and Chlamydia trachomatis on incidence of these infections in men who have sex with men and transgender women taking HIV pre-exposure prophylaxis (the Gonoscreen study): results from a randomised, multicentre, controlled trial

Primum non-nocere: Is it time to stop screening for Neisseria gonorrhoeae and Chlamydia trachomatis in men who have sex with men taking HIV pre-exposure prophylaxis?

The arrested immunity hypothesis in an immunoepidemiological model of Chlamydia transmission

Gonorrhoea and chlamydia screening for asymptomatic people with HIV and HIV PrEP users: open issues

Host: Dr Fabiola Martin, Sexual Health Specialist and Associate Professor, Australian National University, Canberra, Australia

Dr Thibaut Vanbaelen, physician and post-doctoral researcher at The Institute of Tropical Medicine in Antwerp, Belgium

Dr Angelo Roberto Raccagni, physician at Vita-Salute San Raffaele University in Milan, Italy

Today we provide you with an update on the sexually transmitted infection: Trichomonas vaginalis, a protozoan which infects the vagina, urethra and paraurethral glands. It is an uncommon cause of vaginal discharge and penile urethritis and can persist for a long time if left untreated. Up to 50% of people with vaginal infections and especially people with urethral infections remain asymptomatic. Persistent trichomonas infection has been associated with facilitating the transmission of human immunodeficiency virus (HIV) and adverse poor reproductive health outcomes. Dr Christina Muzny, Professor in Infectious Diseases at University of Alabama, Birmingham, USA, will present on published clinical trial data on novel treatment against trichomoniasis.

Relevant publications:

Van Gerwen OT, Aaron KJ, Schroeder J, et al. Spontaneous resolution of Trichomonas vaginalis infection in men. Sexually Transmitted Infections. Published Online First: 27 June 2024. doi: 10.1136/sextrans-2024-056160.

Muzny CA, Van Gerwen OT, Kaufman G, Chavoustie S. Efficacy of single-dose oral secnidazole for the treatment of trichomoniasis in women co-infected with trichomoniasis and bacterial vaginosis: a post hoc subgroup analysis of phase 3 clinical trial data. BMJ Open. 2023;13:e072071

Kissinger PJ, Gaydos CA, Seña AC, McClelland RS, Soper, Secor WE, Legendre D, Workowski KA, Muzny CA, Diagnosis and Management of Trichomonas vaginalis: Summary of Evidence Reviewed for the 2021 Centers for Disease Control and Prevention Sexually Transmitted Infections Treatment Guidelines, Clinical Infectious Diseases, Clinical Infectious Diseases, Volume 74, Issue Supplement_2, 15 April 2022

Howe K and Kissinger PJ. Single-dose compared with multidose metronidazole for the treatment of trichomoniasis in women: a meta-analysis. Sex Transm Dis 2017; 44: 29–34.

Kissinger P, Muzny CA, Mena LA, et al. Single-dose versus 7- day-dose metronidazole for the treatment of trichomoniasis in women: an open-label, randomised controlled trial. Lancet Infect Dis 2018; 18: 1251–1259.

Sherrard J, Pitt R, Hobbs KR, Maynard M, Cochrane E, Wilson J, Tipple C. British Association for Sexual Health and HIV (BASHH) United Kingdom national guideline on the management of Trichomonas vaginalis 2021. Int J STD AIDS. 2022 Jul;33(8):740-750.

STI Guidelines Australia - Trichomoniasis

Host: Dr Fabiola Martin, STI BMJ Podcast editor, a Sexual Health, HIV and HTLV Specialist, Canberra & University of Queensland, Brisbane, Australia

Guest: Dr Christina Muzny, Professor in Infectious Diseases at University of Alabama, Birmingham, USA