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Regional transmission patterns of carbapenemase-producing Enterobacterales: A healthcare network analysis

Published online by Cambridge University Press:  22 April 2022

Bekana K. Tadese
Affiliation:
School of Public Health, University of Texas Health Science Center, Houston, Texas Fort Bend County Health and Human Services, Texas
Kayo Fujimoto
Affiliation:
School of Public Health, University of Texas Health Science Center, Houston, Texas
Stacia M. DeSantis
Affiliation:
School of Public Health, University of Texas Health Science Center, Houston, Texas
Osaro Mgbere
Affiliation:
Disease Prevention and Control Division, Houston Health Department, Houston, Texas Institute of Community Health, University of Houston College of Pharmacy, Houston, Texas
Charles Darkoh*
Affiliation:
School of Public Health, University of Texas Health Science Center, Houston, Texas MD Anderson Cancer Center University of Texas Health Graduate School of Biomedical Sciences, Microbiology, and Infectious Diseases Program, Houston, Texas
*
Author for correspondence: Charles Darkoh, E-mail: Charles.Darkoh@uth.tmc.edu

Abstract

Objective:

Carbapenem-resistant Enterobacterales (CRE) pose a serious public health threat and spread rapidly between healthcare facilities (HCFs) during interfacility patient movement. We examined patterns of transmission of CRE associated with network clustering and positions during patient interfacility transfer.

Methods:

A retrospective cohort study was conducted in the Greater Houston region ofTexas, , and social network analysis was performed by constructing facility-to-facility patient transfer network using CRE surveillance data. The network method (community detection algorithm) was used to detect clustering patterns of CRE in the network. In addition, network measures of centrality and local connectivity (clustering coefficient) were computed for each healthcare facility. Zero-inflated negative binomial regression analysis was applied to test the association between network measures and facility-specific incidence rate of CRE.

Results:

A network of 268 healthcare facilities was identified, in which 10 acute-care hospitals (ACHs) alone accounted for 63% of identified CRE cases. Transmission of New Delhi metallo-β-lactamase–producing CRE occurred in 3 clusters, yet all cases were traced to patients who had had medical care abroad. The incidence rate of CRE attributed to ACHs was >4-fold (adjusted rate ratio, 4.5; 95% confidence interval [CI], 3.02–6.72) higher than that of long-term care facilities. Each additional patient shared with another HCF conferred a 3% (95% CI, 2%–4%) increase in the incidence rate of CRE at that HCF.

Conclusions:

The incidence rates of CRE at a given HCF was predicted by the healthcare network metrics. Increased surveillance and selective targeting of high-risk facilities are warranted.

Type
Original Article
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of The Society for Healthcare Epidemiology of America

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