Optimization strategies for HIV, hepatitis and syphilis testing in Infectious Disease Clinic and Dermatology Unit of Modena: 7-year results of collaboration experience

Background: Screening tests for human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV) and syphilis infections performed in at-risk population show a higher number of positive tests compared to those carried out in the general population. 'Test & Counselling' Ambulatory of Infectious Disease Clinic (T&C-IDC) and Sexually Transmitted Diseases Ambulatory of Dermatology Unit (STDs-DU) of Modena began collaboration in 2010 and adopted a common diagnostic serological profile since 2013. Objectives: The main objective was to analyse the number of screening tests performed in the T&C-IDC and STDs-DU, comparing the results obtained after the adoption of the shared protocol with the previous period. The secondary aim was to evaluate the linkage to care of newly diagnosed patients. Methods: Consecutive patients referred to the T&C-IDC and STDs-DU from January 2010 to December 2016, with at least one performed screening test for HIV, HBV, HCV and syphilis were enrolled. Referral of patients with a new infection was obtained by capture-recapture methods in hospital databases. Results: During the 7-year observation, we collected 13 117 admittances for 9154 patients. A significant increase in the number of screening tests (P < 0.001) and ratio between tests and admissions (P = 0.002) was observed. A total of 644 (7.0%) people with at least one infection were diagnosed. Among these, the most common was syphilis (41.9%), followed by HBV (25.7%), HCV (21.4%) and HIV (10.9%). Syphilis occurred predominantly in Italians (72.5%) and males (75.7%), as like as HCV, while foreign-born (85.5%) mainly harboured HBV infection. HIV diagnosis was detected more frequently among males (67.1%) with a similar proportion between Italians and foreign-born. Five hundred and forty-three out of 644 (84.3%) patients were linked to care. Conclusion: The collaboration between T&C-IDC and STDs-DU has proven to work well increasing the diagnosis over the time and obtaining good results in linkage to care.