Screening Strategies in Different Resource Settings

ABSTRACT

Health care-associated infections/ Hospital-acquired infections (HAIs) have a significant impact on patients' morbidity and mortality. The risk of HAIs in resource-limited settings (RLS) has been reported 2-20 times higher than that in developed countries. Moreover, multi-drug- resistant organisms (MDROs) have emerged and spread throughout the world. In addition, increases in HAIs were observed during the COVID-19 pandemic throughout the world.Thus, screening strategies/surveillance of MDROs were recommended as a core component of infection prevention and control (IPC) measures for the effective HAIs prevention. We review and summarize current critical knowledge on screening strategies in different resource settings, especially on guidelines for the prevention and control of carbapenem- resistant Enterobacteriaceae (CRE), Acinetobacter baumannii (CRAB), and Pseudomonas aeruginosa (CRPsA) in health care facilities. The guidelines (especially WHO) were strongly recommended for surveillance of CRE-CRAB-CRPsA infections and surveillance cultures of asymptomatic CRE colonization. There were conditional recommended on surveillance cultures of the environment for CRE-CRAB-CRPsA colonization/contamination. The surveillance cultures (stool samples or rectal swabs) allowed the early introduction of IPC measures to prevent transmission to other patients and the hospital environment. Given the clinical importance of CRE-CRAB-CRPsA infections, regular ongoing active surveillance of infections were required in all microbiology laboratory settings. In addition, surveillance cultures for asymptomatic CRE colonization should also be performed, guided by local epidemiology and risk assessment. The surveillance cultures of asymptomatic CRE colonization should be considered for patients with previous CRE colonization and patients with a history of recent hospitalization in endemic CRE settings or contacted CRE colonized/ infected patients. In contrast, the evidence available on surveillance cultures for CRAB and CRPsA colonization in asymptomatic patients was not sufficiently relevant for the recommendation. Nowadays, the CRE surveillance strategies have been implemented in various methods from traditional culture- based methods to molecular assays. The limitation of microbiology laboratory capacity for MDROs in RLS was concerning. However, the surveillance data would help with appropriate IPC measure implementation and outbreak investigations. Thus, the proper screening strategies and strengthening microbiology laboratory capacity, especially in RLS are challenge for improving IPC measures and patient outcomes.Copyright © 2023