Jansen K, Steffen G, Potthoff A, et al. - Sexually transmitted infection (STI)-prevalence and risk factors were investigated amongst HIV- and HIV+ men who have sex with men (MSM) in Germany to plan effective interventions. From February to July 2018, a nationwide, cross-sectional study was performed. At 13 MSM-friendly STI-practices, researchers included 2,303 MSM [50.5% HIV+, median age 39 [18–79] years] who were screened for Chlamydia trachomatis, Mycoplasma genitalium, Neisseria gonorrhea, and Trichomonas vaginalis using self-collected rectal and pharyngeal swabs, and urine samples. The overall STI-prevalence of 30.1 was reported; 25.0% among HIV−/PrEP- MSM, 40.3% in HIV−/PrEP+ MSM, and 30.8% in HIV+ MSM. This suggests a high STI-prevalence in MSM in Germany. Independent risk factors for being tested positive for at least one STI were being HIV+, using PrEP, having > 5 sex partners, having condomless sex, and using party drugs.