The importance of blood culture in managing bloodstream infections (BSI) can’t be overemphasized, especially in critical care units such as the Intensive Care Units (ICU). Being the universally accepted technique for diagnosing BSIs and determining the associated resistance pattern, its contamination often leads to diagnostic inaccuracy, promoting the misuse of antibiotics, extended stays in the ICU and escalated healthcare costs. The study under review has brought critical insights that will aid the optimization of infection control strategies and antimicrobial stewardship programs.
This research analyzed 27,544 blood culture samples collected over three years in a tertiary hospital, with the goal of understanding the blood culture contamination rates and ICU-associated factors influencing BSI. It was observed that blood culture contamination rates decreased between the years 2018, 2022, and 2023, pointing to improvements in clinical practices related to sample collection and microbiological procedures. Despite the decreased contamination rates, the study revealed a persistently dominant presence of ESBL-producing bacteria and Klebsiella spp.
Counteracting the encroachment and continued prevalence of these antibiotic-resistant bacteria in the ICU will require bolstering existing antimicrobial stewardship programs and implementing precise, wide-ranging interventions across hospital operations. Future research should strategically focus on areas that will significantly improve patient outcomes and reduce healthcare costs. It is indeed crucial, given the expansive role BSIs play in mortality and morbidity within hospitalized patients, particularly those in the ICU. The often reported factors contributing to contamination include age of the patient, busy nature of hospital wards, and increasing usage of invasive devices like catheters.
Alarmingly, contamination of blood cultures can lead to patients receiving unnecessary broad-spectrum antibiotics, thereby fuelling increased antimicrobial resistance and financial burdens on the healthcare system. Thus, understanding trends in blood culture contamination would not only ensure a more reliable diagnostic process, but also contribute to more efficient management of infections in ICUs. The outcomes of this study are vital in the context of patient safety, hospital efficiency, and advancement of healthcare services. These findings will considerably aid the expansion of regional infection control strategies and future improvements in healthcare services.
Source: https://bmcinfectdis.biomedcentral.com/articles/10.1186/s12879-025-11908-0