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Bloodstream infections caused by multidrug-resistant non-fermentative bacilli in southern of Poland in 2013

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  • 2,
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  • 3,
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Antimicrobial Resistance and Infection Control20154 (Suppl 1) :P138

  • Published:


  • Testosterone
  • Drug Resistance
  • Pseudomonas Aeruginosa
  • Antimicrobial Susceptibility
  • Colistin


Modern medicine requires a clear and explicit criteria to describe the phenomena of public health; and one of the major problems of public health is drug resistance of microorganisms.


The aim of this study was to analyze how big epidemiological problem are highly-resistant – multidrug-resistant (MDR) and extensively-drug resistant (XDR) non-fermentative bacilli isolated from bloodstream infections (BSI) in southern Poland.


The study comprised consecutive, non-repetitive non-fermentative bacilli (NFB) isolates received by the Chair of Microbiology UJCM with collaborative 2 laboratories in 2013 from BSI of hospitalized (12 hospitals) throughout south of Poland (Malopolska and Silesia).

Studied strains from BSI were belonging to groups: ACI (Acinetobacter baumannii n=21, Acinetobacter lwoffii n=1, Acinetobacter ursingi n=1), PAR (Pseudomonas aeruginosa n=12), and others (Stenotrophomonas malthophilia n=10, Achromobacter denitrificans n=5, Comamonas testosterone n=1, Ochrobactrum anthropi n=1).

Antimicrobial susceptibility was assessed according to current EUCAST guidelines. Different patterns of resistance were defined according to Magiorakos (2012) as: MDR strains or XDR.


NFB strains occurred with different frequencies, the highest prevalence was associated with ACI: 1.3%.

More than 75% of ACI strains were resistant to 14 out of 16 antimicrobials, among ACI also found the highest share of XDR: 95.7%. The most of these isolates were resistant to all antibiotics with the exception of colistin: MIC50 for colistin was 1.

In the group of PAR isolates 91.7% were XDR, MIC50 for colistin was 1.

DiversiLab typing demonstrated the presence of two dominant ACI clones. Clone 1 and clone 2 , both are classified as the European clone 2 (EUII).


The presented data indicate a high potential therapeutic problems related to the large resistance of ACI isolates. The used stratification of drug resistance (MDRO/XDR/PDR) may become an important tool for the assessment of public health and microbiological hazards at different levels. (supported by DEC-2012/05/B/NZ7/02880).

Disclosure of interest

None declared.

Authors’ Affiliations

Jagiellonian University Medical School, Kraków, Poland
Department of Microbiology, Analytical and Microbiological Laboratory, Korlab Nzoz, Ruda Slaska, Poland
Higher School of Medicine in Sosnowiec, Sosnowiec, Poland


© Chmielarczyk et al; licensee BioMed Central Ltd. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated.