Drug-resistant bacteria are spreading rapidly through intensive care units in Bangladesh, where studies by the International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b) show that over half of patients who initially carry none of the pathogens acquire them during hospital care. According to icddr,b data, more than 90 percent of ICU patients who develop confirmed infections from these resistant strains ultimately die, though targeted intervention trials prove that enhanced prevention protocols can drastically cut both infection rates and fatalities.
Hospital-Acquired Transmission in Dhaka Intensive Care Units
Researchers examining critical care wards in Dhaka hospitals have tracked a high rate of secondary bacterial acquisition among vulnerable patients. A study published in the journal Microbiology Spectrum analyzed 373 critically ill adults admitted to a government tertiary hospital ICU between July 2023 and February 2024. Funded by the US Centers for Disease Control and Prevention (CDC), the project was led by Gazi Md Salahuddin Mamun, an assistant scientist at icddr,b.
Scientists utilized laboratory tests and whole-genome sequencing to monitor how drug-resistant pathogens spread through clinical environments. The investigation focused on four common bacteria: Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii, and Pseudomonas aeruginosa. Many strains of these pathogens no longer respond to standard antibiotics.
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Genetic analysis revealed that in some patients, the same strain of bacteria they had been carrying later caused life-threatening infections.
High Colonization Rates and Mortality Risks
Nearly half of all incoming ICU patients—specifically 48.5 percent—carried the targeted drug-resistant bacteria in their bodies without showing symptoms at the time of admission. Out of 198 patients who initially tested negative for the pathogens, 105 individuals—or 53 percent—subsequently acquired the bacteria during their hospital stay.
Dr Fahmida Chowdhury, lead of the Antimicrobial Resistance Research Unit at icddr,b and principal investigator of the study, emphasized the clinical gravity of these findings. “A hospital should be a place of healing, not a place where patients acquire another potentially life-threatening infection while seeking treatment,” she stated. Among the cohort of patients who developed confirmed infections from these resistant strains, mortality exceeded 90 percent in the ICU. Researchers attribute this exceptionally high death rate to resource-constrained intensive care units, limited treatment options, and overcrowding.
Proven Infection Control Measures Cut Deaths
A second icddr,b study demonstrated that targeted interventions can reverse these grim statistics. Following seven months of enhanced infection prevention and control measures, bloodstream infections dropped from 28 down to four per 100 admissions, representing an 86 percent reduction.
Mortality rates followed a similar downward trajectory, declining from 26 to four per 100 admissions. Tahmeed Ahmed, executive director of icddr,b, noted that the data proves basic hygiene and surveillance work. He urged hospital authorities and policymakers to treat infection prevention, hospital hygiene, surveillance, and responsible antibiotic use as core patient safety priorities to combat antimicrobial resistance.
Frequently Asked Questions
What are the primary drug-resistant bacteria spreading in ICUs?
The research highlights four major pathogens: Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii, and Pseudomonas aeruginosa.
How many patients acquired bacteria while in the ICU?
According to icddr,b data, 53 percent of patients who initially tested negative for the bacteria acquired them during their hospital stay.
Can hospitals reduce these severe infection rates?
Yes. A second icddr,b study showed that sustained infection prevention measures reduced bloodstream infections by 86 percent and lowered patient mortality significantly.
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