These Guidelines are an online resource for primary care health professionals. They provide concise information to support the prevention, testing, diagnosis, management and treatment of sexually transmissible infections (STIs) for adults and adolescents and are frequently cited and referenced by other guidelines. They were developed under the auspice of the Australasian Sexual and Reproductive Health Alliance (ASRHA) and are managed by the Australasian Society for HIV, Viral Hepatitis and Sexual Health Medicine (ASHM).