國家衛生研究院 NHRI:Item 3990099045/11906

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Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/11906

Title:	Bloodstream infection with extended-spectrum beta-lactamase-producing Escherichia coli: The role of virulence genes
Authors:	Hung, WT;Cheng, MF;Tseng, FC;Chen, YS;Shin-Jung Lee, S;Chang, TH;Lin, HH;Hung, CH;Wang, JL
Contributors:	National Institute of Infectious Diseases and Vaccinology
Abstract:	BACKGROUND: Extraintestinal pathogenic Escherichia coli (ExPEC) strains hold the responsibility for the majority of E. coli infections. Numerous extraintestinal virulence factors (VFs) were possessed by ExPEC which are involved in the pathogenesis of infection. However, the effect of comorbidities or infection syndrome in the association of VFs and mortality remains inconclusive. METHOD: This study addressed whether specific sequence type (ST) and VFs of extended-spectrum beta-lactamase-producing E. coli (ESBL-EC) are associated with different outcomes in patients with bloodstream infection. 121 adults from southern Taiwan with ESBL-EC bloodstream infections were enrolled during a 6-year period. Demographic data, including infection syndromes, underlying disease and outcomes, were collected. The virulence factors in isolates were analyzed by PCR and multilocus sequence typing analyses were also performed. RESULT: Positivity for the virulence genes iha, hlyD, sat, iutA, fyuA, malX, ompT, and traT was associated with ST131 positivity (P < 0.05). Some ESBL-EC virulence genes associated with urinary tract infection (UTI) were revealed. Positivity for ST405 and the virulence genes iroN and iss were significantly associated with increased 30-day mortality (death within 30 days) on univariate analysis (P < 0.05). Independent risk factors of 30-day mortality in bacteremic patients with UTI included underlying chronic liver disease and malignancy. ST131 was borderline associated with 30-day mortality. Independent risk factors associated with 30-day mortality among bacteremic patients without UTI included comorbidities and iroN positivity. CONCLUSION: In bacteremic patients with UTI, and the ST131 clone was borderline associated with mortality. Positivity for the virulence gene iroN may be linked to mortality in bacteremic patients without UTI.
Date:	2019-12
Relation:	Journal of Microbiology, Immunology, and Infection = Wei Mian Yu Gan Ran Za Zhi. 2019 Dec;52(6):947-955.
Link to:	http://dx.doi.org/10.1016/j.jmii.2019.03.005
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1684-1182&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000502816900014
Cited Times(Scopus):	https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85065075853
Appears in Collections:	[Fan-Chen Tseng] Periodical Articles

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