Acquisition of carbapenem-resistant gram-negative bacilli among intensive care unit (ICU) patients with no previous use of carbapenems: Indirect population impact of antimicrobial use.
Infect Control Hosp Epidemiol
; 43(11): 1575-1579, 2022 11.
Article
in English
| MEDLINE | ID: covidwho-2118588
ABSTRACT
OBJECTIVE:
To measure the impact of exposure to patients using carbapenem on the acquisition of carbapenem-resistant gram-negative bacilli (CR-GNB) among patients not using carbapenems.DESIGN:
An ecological study and a cohort study.SETTING:
Two medical surgical intensive care units (ICUs) in inner Brazil.PARTICIPANTS:
Patients admitted to 2 ICUs from 2013 through 2018 to whom carbapenem was not prescribed.METHODS:
In the ecologic study, the monthly use of carbapenems (days of therapy [DOT] per 1,000 patient days) was tested for linear correlation with the 2-month moving average of incidence CR-GNB among patients to whom carbapenem was not prescribed. In the cohort study, those patients were addressed individually for risk factors (demographics, invasive interventions, use of antimicrobials) for acquisition of CR-GNB, including time at risk and the "carbapenem pressure," described as the aggregate DOT among other ICU patients during time at risk. The analysis was performed in univariate and multivariable Poisson regression models.RESULTS:
The linear regression model revealed an association of total carbapenem use and incidence of CR-GNB (coefficient, 0.04; 95% confidence interval [CI], 0.02-0.06; P = .001). In the cohort model, the adjusted rate ratio (RR) for carbapenem DOT was 1.009 (95% CI, 1.001-1.018; P = .03). Other significant risk factors were mechanical ventilation and the previous use of ceftazidime (with or without avibactam).CONCLUSIONS:
Every additional DOT of total carbapenem use increased the risk of CR-GNB acquisition by patients not using carbapenems by nearly 1%. We found evidence for a population ("herd effect"-like) impact of antimicrobial use in the ICUs.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Cross Infection
/
Gram-Negative Bacterial Infections
Type of study:
Cohort study
/
Experimental Studies
/
Observational study
/
Prognostic study
/
Randomized controlled trials
Limits:
Humans
Language:
English
Journal:
Infect Control Hosp Epidemiol
Journal subject:
Communicable Diseases
/
Nursing
/
Epidemiology
/
Hospitals
Year:
2022
Document Type:
Article
Affiliation country:
Ice.2021.514
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