Embedding a Novel Screening Programme for Sexually Transmitted Infections Within an Ambulatory Emergency Surgical Admissions Unit: An Observational Cohort Study

Abstract

Abstract Aims To establish a sexually transmitted infection (STI) screening programme for females presenting to an Emergency Ambulatory Surgical Clinic (ASC), and to analyse incidence and prevalence of STIs as an underlying cause for their abdominal pain. Methods Observational cohort study in ASC of a tertiary hospital. Between December 2021 to December 2022, females aged 18-44 years presenting with abdominal pain were offered self-collected vulvovaginal swabs for chlamydia and gonorrhoea as part of a new standardised diagnostic pathway. Positive results were referred to local sexual health services for treatment and contact tracing. Main outcome measures included number of patients consenting to the screening programme and number of positive swab results. Results The cohort comprised 297 eligible patients; 259 with 20 patients declining testing and 18 samples rejected. A total of 5.4% of swabs were positive (2 gonorrhoea, 12 chlamydia) with mean age of 24.5. All positive patients presented with lower abdominal pain and of these, only 25% had a documented sexual history during assessment. 7 had further imaging with 4 results diagnosing pelvic inflammatory disease (PID). 4 patients were treated for PID empirically. Remaining patients were treated for non-specific pain or unrelated pathology. Conclusions Undiagnosed STIs are prevalent, and have known fertility and public health risks. Young females with lower abdominal pain provide an opportunistic and arguably necessary screening cohort in ASC with good uptake of self-testing. Results demonstrate high incidence of positive tests, suggesting that inclusion of sexual history during assessment is vital to identify those with highest STI risk.