Abstract

The objective of this study was to investigate risk factors for multidrug-resistant organism (MDRO) infection within patients from a tertiary care hospital in Northern India. This case-control study examined MDRO infection risk factors, including diet, health history, and medical device use. We administered a diet questionnaire to collect data on usual diet and collected data on other risk factors from chart review. All participants were inpatients identified through hospital microbiology reports. A total of 39 MDRO patient cases and 91 controls were included. Descriptive statistics, univariate analysis, and multivariate logistic regression were performed to evaluate the association between risk factors and MDRO infection. All cases had gram-negative MDRO infections. Univariate analyses found length of hospital stay, connective tissue disease, hospitalization in the last 12 months, hospitalization of a family member, in-hospital antibiotic use, antibiotic use in the last 12 months, and feeding tube, central venous line, and urinary catheter use to be significantly different between cases and controls. Logistic regression showed a >3-fold increase in the odds of infection with antibiotic use in the last 12 months (odds ratio [OR], 3.30; 95% confidence interval [CI], 1.22-8.91) and urinary catheter use (OR, 3.63; 95% CI, 1.14-11.58). Differences in dietary preferences and fruit, vegetable, and fiber consumption were not significantly associated with infection. Antibiotic use is a major driver of MDRO infections. Our findings suggest that interventions optimizing antibiotic stewardship and reducing device use should be a priority to prevent MDRO infections.

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