Prediction of antimicrobial resistance in clinical Campylobacter jejuni isolates from whole-genome sequencing data

Abstract Campylobacter jejuni is recognised as the leading cause of bacterial gastroenteritis in industrialised countries. Although the majority of Campylobacter infections are self-limiting, antimicrobial treatment is necessary in severe cases. Therefore, the development of antimicrobial resistance (AMR) in Campylobacter is a growing public health challenge and surveillance of AMR is important for bacterial disease control. The aim of this study was to predict antimicrobial resistance in C. jejuni from whole-genome sequencing data. A total of 516 clinical C. jejuni isolates collected between 2014 and 2017 were subjected to WGS. Resistance phenotypes were determined by standard broth dilution, categorising isolates as either susceptible or resistant based on epidemiological cutoffs for six antimicrobials: ciprofloxacin, nalidixic acid, erythromycin, gentamicin, streptomycin, and tetracycline. Resistance genotypes were identified using an in-house database containing reference genes with known point mutations and the presence of resistance genes was determined using the ResFinder database and four bioinformatical methods (modified KMA, ABRicate, ARIBA, and ResFinder Batch Upload). We identified seven resistance genes including tet(O), tet(O/32/O), ant(6)-Ia, aph(2″)-If, blaOXA, aph(3′)-III, and cat as well as mutations in three genes: gyrA, 23S rRNA, and rpsL. There was a high correlation between phenotypic resistance and the presence of known resistance genes and/or point mutations. A correlation above 98% was seen for all antimicrobials except streptomycin with a correlation of 92%. In conclusion, we found that WGS can predict antimicrobial resistance with a high degree of accuracy and have the potential to be a powerful tool for AMR surveillance..

Media Type:

Article

Year of Publication:

2020

Publication:

2020

Contained In:

To Main Record - volume:40

Contained In:

European journal of clinical microbiology & infectious diseases - 40(2020), 4 vom: 24. Sept., Seite 673-682

Language:

English

Contributors:

Dahl, Louise Gade [Author]
Joensen, Katrine Grimstrup [Author]
Østerlund, Mark Thomas [Author]
Kiil, Kristoffer [Author]
Nielsen, Eva Møller [Author]

Links:

Volltext [lizenzpflichtig]

Keywords:

AMR surveillance
Antimicrobial resistance
Public health
Whole-genome sequencing

RVK:

RVK Klassifikation

Notes:

© The Author(s) 2020

doi:

10.1007/s10096-020-04043-y

funding:

Supporting institution / Project title:

PPN (Catalogue-ID):

OLC2124466275

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