title: Syphilis is back.
authors.forename: Gerard
authors.initials: G
authors.lastname: MacMahon
mesh_terms: D001315:Australia / Q000453:epidemiology; D015897:Comorbidity; D017280:Condoms; D015658:HIV Infections / Q000453:epidemiology; D018451:Homosexuality, Male / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D012747:Sexual Partners; D013587:Syphilis / Q000175:diagnosis* / Q000453:epidemiology / Q000517:prevention & control*; D013588:Syphilis Serodiagnosis