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An overview of resistance profiles ESKAPE pathogens from 2010-2015 in a tertiary respiratory center in Romania.

Lower respiratory tract infections (LRTIs) is an umbrella term that covers a wide spectrum of diseases, comprising mild and severe, acute and chronic conditions. A wide spectrum of pathogens can be implicated, from viruses to pyogenic and atypical bacteria. A special place should be reserved for slow growing bacteria (Mycobacteria spp., Nocardia spp.) and parasites (i.e., hydatic cysts caused by Echinococcus granulosus).

OBJECTIVE: The objective of this study is to observe, analyze and establish the drug susceptibility patterns for Enterococcus spp., Staphylococcus aureus, Klebsiella spp., Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter spp. (the ESKAPE pathogens) in the "Marius Nasta" Institute for Pulmonary Medicine (MNIPM), Bucharest, Romania.

MATERIALS AND METHODS: A retrospective healthcare record based study was undertaken to establish the drug susceptibility patterns. We assessed all antibiograms of the ESKAPE pathogens isolated from respiratory samples from adult inpatients hospitalized between 2010-2015 at the MNIPM.

RESULTS: We analyzed 2859 isolates (61% of the 4683 ESKAPE isolates). P. aeruginosa was the most frequent pathogen, while Enterococcus spp. and Enterobacter spp. were practically non-present. The antibiotic profile of P. aeruginosa isolates presented more resistance in the Intensive Care Unit (ICU)÷Surgery wards, probably resulting from antibiotic pressure. The other non-fermenter, A. baumannii, while less frequent (and the only pathogen more frequent in the surgery department) had an even more resistant profile, to almost all antibiotics, with the exception of Colistin. Methicillin-resistant S. aureus (MRSA) accounted for about 60% of all isolates, more in the ICU÷Surgery ward. K. pneumoniae presents a less resistance and shows more stability when analyzing the antibiogram pattern in the Medical wards.

DISCUSSION: For methodological or procedural reasons, Enterococcus spp. and Enterobacter spp. were underrepresented in the study. Interventional programs comprising antibiotic stewardship and active surveillance need to be implemented to alleviate the antibiotic profile. Further research needs to focus on more detailed characterization of the molecular mechanisms leading to the high resistance detailed herein.

CONCLUSIONS: This study adds to the body of literature reporting the antibiotic resistance landscape in Romania, for these highly resistant pathogens.

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