Abstract
The widespread evolution of phenotypic resistance in clinical isolates over the years, coupled with the COVID-19 pandemic onset, has exacerbated the global challenge of antimicrobial resistance. This study aimed to explore changes in bacterial infection patterns and antimicrobial resistance during the COVID-19 pandemic. This study involved the periods before and during COVID-19: the pre-pandemic and pandemic eras. The surveillance results of bacterial isolates causing infections in cancer patients at an Egyptian tertiary oncology hospital were retrieved. The Vitek®2 or Phoenix systems were utilized for species identification and susceptibility testing. Statistical analyses were performed comparing microbiological trends before and during the pandemic. Out of 2856 bacterial isolates, Gram-negative bacteria (GNB) predominated (69.7%), and Gram-positive bacteria (GPB) comprised 30.3% of isolates. No significant change was found in GNB prevalence during the pandemic (P = 0.159). Elevated rates of Klebsiella and Pseudomonas species were demonstrated during the pandemic, as was a decrease in E. coli and Acinetobacter species (P < 0.001, 0.018, < 0.001, and 0.046, respectively) in hematological patients. In surgical patients, Enterobacteriaceae significantly increased (P = 0.012), while non-fermenters significantly decreased (P = 0.007). GPB species from either hematological or surgical wards exhibited no notable changes during the pandemic. GNB resistance increased in hematological patients to carbapenems, amikacin, and tigecycline and decreased in surgical patients to amikacin and cefoxitin (P < 0.001, 0.010, < 0.001, < 0.001, and 0.016, respectively). The study highlights notable shifts in the microbial landscape during the COVID-19 pandemic, particularly in the prevalence and resistance patterns of GNB in hematological and surgical wards.
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All authors contributed to the study’s conception and design. R. M. Abdel-Hamid and M. Elswify performed material preparation and data collection. R. M. Abdel-Hamid, H. A. El-Mahallawy, and R. M. Allam analyzed the data. The first draft of the manuscript was written by R. M. Abdel-Hamid and M. M. Zafer, edited and revised by H. A. El-Mahallawy. All authors commented on the manuscript’s previous versions and approved the final copy.
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The study adhered to the Helsinki Declaration’s guidelines. It was approved by the NCI ethics committee at Cairo University with permission number CP2023-503–059, and it was determined that no informed consent was required.
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Abdel-Hamid, R.M., El-Mahallawy, H.A., Allam, R.M. et al. Changing patterns of bacterial profile and antimicrobial resistance in high-risk patients during the COVID-19 pandemic at a tertiary oncology hospital. Arch Microbiol 206, 250 (2024). https://doi.org/10.1007/s00203-024-03965-x
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DOI: https://doi.org/10.1007/s00203-024-03965-x