Fecal Carriage of ESBL types TEM, SHV, CTX Producing Genera Proteus, Morganella, Providencia in Patients of Iran

Akhi, Mohammad Taghi; Gholizadeh, Pourya; Ghotaslu, Reza; Asgharzadeh, Mohammad; Sourush, Mohammad Hossein; Naghilli, Behrouz; Gholmohammadi, Peyman; Bialvaei, Abed Zahedi

doi:10.21276/ambi.2016.03.2.ra06

Cited by 1 publication

(2 citation statements)

References 12 publications

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“…For the analysis of ESBL strains, the method described by Akhi et al for the bla CTX-M primer pair was used. 21 …”

Section: Methodsmentioning

confidence: 99%

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Distribution of NDM1 Carbapenemase-Producing Proteeae Strains on High-Risk Hospital Wards

Rus¹,

Licker²,

Musuroi³

et al. 2020

IDR

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Background: Carbapenem-resistant Proteeae (CRP) is a group of multidrug-resistant (MDR) microorganisms that raise special treatment problems due to their intrinsic resistance to colistin. In this study, our aim is to provide a phenotypic and molecular characterization of the carbapenemases secreted by CRP strains isolated from inpatients from an intensive care unit (ICU) and surgical wards, as well as the identification of the risk factors involved in their acquisition. Methods: An observational, cross-sectional study was performed which included all Proteeae strains isolated in samples from inpatients on high-risk wards of the largest university hospital in Western Romania, from July 2017 to April 2019. Meropenemresistant strains (N=65) with MIC ≥16 µg/mL were subjected to a singleplex PCR assay for the detection of blaNDM, blaVIM and blaCTX-M genes. The analysis of risk factors was performed by logistic regression. Results: Out of 8317 samples that were processed, 400 Proteeae strains were isolated: 64% belonging to the genus Proteus, 26.75% to the genus Providencia and 9.25% to the genus Morganella. Most CRP strains (N=56) were of MBL type, and 55 had the blaNDM gene as the prevalent gene substrate. P. stuartii was the main species that provided the circulating MDR strains. Most CRP strains came from patients admitted to ICU, being isolated mainly from bronchial aspirates and blood cultures. Multivariate analysis revealed 3 independent risk factors -mechanical ventilation>96h ], p <0.001), tracheostomy (HR: 2.65 [1.14-6.17], p = 0.024) and prolonged antibiotic therapy (HR: 1.01 [1.00--1.02], p = 0.03). Conclusion:There is a significant increase in the incidence of CR P. stuartii strains, the MBL-blaNDM type being predominant. These strains presented various other resistance mechanisms, being often extremely difficult to treat and led to an excess of lethality of 27.16%.

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“…For the analysis of ESBL strains, the method described by Akhi et al for the bla CTX-M primer pair was used. 21 …”

Section: Methodsmentioning

confidence: 99%

“…For the analysis of ESBL strains, the method described by Akhi et al for the blaCTX-M primer pair was used. 21 The following reference strains were used for positive control: Escherichia coli R45 (NDM), R61 (VIM) and R1818 (CTX-M) purchased from the Université de Fribourg. For negative control, Escherichia coli ATCC 25922 was used.…”

Section: Molecular Methodsmentioning

confidence: 99%