This article presents a detailed study on intestinal colonization by Carbapenem-resistant Enterobacteriaceae (CRE) conducted by the First Affiliated Hospital of Kunming Medical University, aiming to gain an understanding of the molecular epidemiology and risks contributing to subsequent infection. The research studiously tracked patients identified as CRE-positive through active rectal-swab screening from August 2023 to August 2024, monitoring them for damage that could follow such colonization. The collected and examined isolates were scrutinized for carbapenem-resistance genes, crucial virulence genes, and capsular serotypes, with multilocus sequence typing brought into play for assessment.
Clinical data was processed through multivariate logistic regression to pinpoint the risk factors tied to prospective secondary infections. The proactive screening initiative was a comprehensive one, devised to detect colonized but asymptomatic patients at their point of hospital entry. This allowed infection control professionals to quarantine and specifically manage affected patients to avoid the risk of nosocomial transmission. The collected data from these patients included demographic details, hospitalization history, underlying diseases and comorbidities, prior healthcare exposure details, and a record of any invasive procedures and antimicrobial therapy they may have undergone.
CRE isolates then underwent rigorous antimicrobial susceptibility testing, with molecular typing employed to evaluate the genetic relatedness among the isolates from those who went on to develop infections. The study concluded that host health and bacterial genetic traits together contribute significantly to secondary infections. The collective insights procured from this research are expected to enhance the existing mechanisms of predicting high-risk patients and strategizing individualized therapeutic techniques in the field of Infection Prevention and Control.