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Journal of Medical Bacteriology، جلد ۱۳، شماره ۳، صفحات ۳۷-۴۴
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عنوان انگلیسی Evaluation of Colistin Susceptibility among Multidrug-Resistant Gram-Negative Pathogens isolated from Blood Culture: Evidence from a Tertiary Care Setting in Delhi, India
چکیده انگلیسی مقاله Background:   Antibiotic resistance is a grave threat to managing bloodstream infections, with MDR gram-negative pathogens like carbapenem-resistant Klebsiella pneumoniae and Escherichia coli escalating globally. This study sought to assess the colistin susceptibility profiles of MDR gram-negative clinical isolates obtained from blood cultures within a high-burden tertiary care facility in Delhi. Methods:   This cross-sectional study was conducted in the Department of Microbiology at UCMS & GTB Hospital, Delhi, from January 2023 to June 2024. A total of 80 multidrug-resistant gram-negative clinical isolates from blood cultures were included. Carbapenem resistance was confirmed using the Modified Carbapenem Inactivation Method (mCIM), while colistin resistance was determined through Broth Microdilution Testing (BMD). Results:   A study conducted over one year tested 80 Enterobacterales isolates, with 74 (92.5%) identified as CRE using the Kirby Bauer disc diffusion method and confirmed by mCIM testing. The majority of isolates (44%) were from NICU, with a male predominance (60%). Enterobacter species (40%) was the most prevalent, followed by Klebsiella pneumoniae (26.6%), Citrobacter species (20%), and Escherichia coli (13.4%). The study found high multidrug resistance, with 100% resistance to most antibiotics in Enterobacter and Klebsiella species. All 74 isolates showed intermediate colistin susceptibility, with 43.2% exhibiting an MIC of 0.031 µg/mL. Conclusion:   This study highlights the urgent need for colistin stewardship programs to address the rise of CRE. The emergence of colistin resistance, especially in NICUs and ICUs, requires enhanced monitoring and rapid diagnostics. Focusing on vulnerable populations like neonates and critically ill patients is crucial to combat multidrug-resistant infections.
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نویسندگان مقاله | Swati Nirmal
Microbiology Department, University College of Medical Sciences, Dilshad Garden, Delhi, India.


| Kirti Nirmal
Microbiology Department, University College of Medical Sciences, Dilshad Garden, Delhi, India.


| Haarish Jayaraj
Microbiology Department, University College of Medical Sciences, Dilshad Garden, Delhi, India.


| Poonam Singh
Microbiology Department, University College of Medical Sciences, Dilshad Garden, Delhi, India.


| Shukla Das
Microbiology Department, University College of Medical Sciences, Dilshad Garden, Delhi, India.
نشانی اینترنتی https://jmb.tums.ac.ir/index.php/jmb/article/view/574
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