Today we will discuss the evolution and efficacy of antenatal testing for blood borne pathogens as a strategy to improve pregnancy outcomes and prevent parent to child transmission. Over the last 40 years the number of infections tested for in the antenatal setting has expanded which has been followed closely by treatment guidelines for each infection. However, there are stark regional differences in the infections routinely tested for. Brazil has recently added Human T Leukaemia Virus (HTLV) to its antenatal testing and is planning to test 2.5 million pregnancies yearly. Pregnant people who test positive for HTLV are advised to avoid breast feeding and are provided with formula milk free of charge. Health care providers are being offered upskilling in HTLV care provision. This way Brazil aims to "Take HTLV out of Invisibility" and ultimately eliminate HTLV in Brazil.

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

Guests: Professor Graham Taylor, Head of Section of Virology at Imperial College London and a founder of the National Centre for Human Retrovirology at St. Mary’s Hospital – the UK’s clinical service for people living with Human T Leukaemia Virus (HTLV) infection.

Dr Pâmela Cristina Gaspar, General Coordinator of Sexually Transmitted Infections Surveillance at Ministry of Health of Brazil, Brasilia, Brazil Host: Ass Prof/Dr Fabiola Martin, Sexual health, HIV and HTLV Specialist, Canberra, Australia and Australian National University

Brazil HTLV ANC testing: - National guide: https://www.gov.br/aids/pt-br/central-de-conteudo/publicacoes/2022/guia_htlv_internet_24-11-21-2_3.pdf/view - Folder HTLV for general population: https://www.gov.br/aids/pt-br/assuntos/ist/materiais-informativos/folder-htlv-final-grafica.pdf - Distance Learning Course for HTLV: https://campusvirtual.fiocruz.br/gestordecursos/hotsite/htlv

NACCHO-ASHM, Australia, HTLV testing guidelines: https://htlv1.guidelines.org.au/

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