<abstract xmlns="http://www.w3.org/1999/xhtml"><italic>Cronobacter</italic> spp. have been recognized as causative agents of various severe infections in pre-term or full-term infants as well as elderly adults suffering from serious underlying disease or malignancy. A surveillance study was designed to identify antibiotic resistance among clinical <italic>Cronobacter</italic> spp. strains, which were isolated from patients of two hospitals between May 2007 and August 2013. Altogether, 52 <italic>Cronobacter</italic> spp. isolates were analyzed. Although MALDI-TOF mass spectrometry recognized all <italic>Cronobacter sakazakii</italic> and <italic>Cronobacter malonaticus</italic> strains, it could not identify <italic>Cronobacter muytjensii</italic> strain. Nevertheless, all strains were identified as <italic>Cronobacter</italic> spp. using multilocus sequence typing (MLST). Strains were tested against 17 types of antibiotics, using the standard microdilution method according to the 2018 European Committee on Antimicrobial Susceptibility Testing criteria. Three <italic>Cronobacter</italic> species were identified as <italic>C. sakazakii</italic> (n = 33), <italic>C. malonaticus</italic> (n = 18), and <italic>C. muytjensii</italic> (n = 1); all isolates were susceptible to all tested antibiotics. All strains were PCR-negative for <italic>bla</italic>TEM, <italic>bla</italic>SHV, and <italic>bla</italic>CTX-M β-lactamase genes, as well. Even though the results of this study showed that <italic>Cronobacter</italic> spp. isolates were pan-susceptible, continued antibiotic resistance surveillance is warranted.</abstract>

Cronobacter spp. have been recognized as causative agents of various severe infections in pre-term or full-term infants as well as elderly adults suffering from serious underlying disease or malignancy. A surveillance study was designed to identify antibiotic resistance among clinical Cronobacter spp. strains, which were isolated from patients of two hospitals between May 2007 and August 2013. Altogether, 52 Cronobacter spp. isolates were analyzed. Although MALDI-TOF mass spectrometry recognized all Cronobacter sakazakii and Cronobacter malonaticus strains, it could not identify Cronobacter muytjensii strain. Nevertheless, all strains were identified as Cronobacter spp. using multilocus sequence typing (MLST). Strains were tested against 17 types of antibiotics, using the standard microdilution method according to the 2018 European Committee on Antimicrobial Susceptibility Testing criteria. Three Cronobacter species were identified as C. sakazakii (n = 33), C. malonaticus (n = 18), and C. muytjensii (n = 1); all isolates were susceptible to all tested antibiotics. All strains were PCR-negative for blaTEM, blaSHV, and blaCTX-M β-lactamase genes, as well. Even though the results of this study showed that Cronobacter spp. isolates were pan-susceptible, continued antibiotic resistance surveillance is warranted.

Antibiotic Susceptibility of <italic>Cronobacter</italic> spp. Isolated from Clinical Samples

Polish Journal of Microbiology

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Antibiotic Susceptibility of  spp. Isolated from Clinical Samples

Cronobacter spp. have been recognized as causative agents of various severe infections in pre-term or full-term infants as well as elderly adults suffering...

Antibiotic Susceptibility of Cronobacter spp. Isolated from Clinical Samples

Article Category: original-paper

Publicado en línea: 27 mar 2019

Páginas: 5 - 14

DOI: https://doi.org/10.21307/pjm-2019-001

Palabras clave
antibiotics, antimicrobial susceptibility, spp., MALDI-TOF mass spectrometry, multilocus sequence typing

© 2019 Ondřej Holý et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Antibiotic Susceptibility of Cronobacter spp. Isolated from Clinical Samples

Article Category: original-paper

Publicado en línea: 27 mar 2019

Páginas: 5 - 14

DOI: https://doi.org/10.21307/pjm-2019-001

Palabras claveantibiotics, antimicrobial susceptibility, spp., MALDI-TOF mass spectrometry, multilocus sequence typing

© 2019 Ondřej Holý et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Palabras clave
antibiotics, antimicrobial susceptibility, spp., MALDI-TOF mass spectrometry, multilocus sequence typing