CARACTERIZAÇÃO FENOTÍPICA E GENOTÍPICA DE ENTEROBACTERALES MULTIRESISTENTES A ANTIMICROBIANOS DE NEONATOS DE UM HOSPITAL NA ZONA NOROESTE DO PARANÁ.
CARACTERIZAÇÃO FENOTÍPICA E GENOTÍPICA DE ENTEROBACTERALES MULTIRESISTENTES A ANTIMICROBIANOS DE NEONATOS DE UM HOSPITAL NA ZONA NOROESTE DO PARANÁ.
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DOI: https://doi.org/10.22533/at.ed.3232524046
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Palavras-chave: Neonatos, Klebsiella pneumoniae, Serratia marcescens, Enterobacterales, Carbapenêmicos, Betalactamase de espectro ampliado.
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Keywords: Neonatos, Klebsiella pneumoniae, Serratia marcescens, Enterobacterales, Carbapenêmicos, Betalactamase de espectro ampliado.
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Abstract: In 2017, the World Health Organization grouped a series of pathogens as priorities for the development of new antimicrobials. Among them are enterobacterales, resistant to beta-lactams. Considering that newborns are more vulnerable to infections, as they do not have a mature immune system and frequently use a series of antimicrobials, this study aims to phenotypically and genotypically characterize Enterobacterales obtained from surveillance swab cultures from a hospital in the northwest region of Paraná. . The samples were identified using manual methodology, resistance was visualized using the disk diffusion technique, and the production of extended spectrum beta-lactamase (ESBL) enzymes was verified using the approximation disk technique and polymerase chain reaction. (PCR) for those ESBL positive or carbapenem resistant (CR) samples. The β-lactamase genes, blaCTX-M1, blaCTX-M15, blaCTX-M2, blaCTX-M8, blaCTX-M9 and bla CTX-M25, and the carbapenemases genes, blaKPC and blaNDM, were investigated. As a result, 43.2% of the isolates were positive for Klebsiella pneumoniae, 24.6% for Escherichia coli, 15.3% for Serratia marcescens and 11.9% for Enterobacter spp. Of these, K. pneumoniae presented the highest resistance rates, with 18% being ESBL positive and 40% of its samples CR, and the second to present the highest rates was S. marcescens, presenting 66.66% of its isolates positive for ESBL, when investigating the genes present in both, there was a predominance in K. pneumoniae, with 93% presenting the blaCTX-M1 group 1 gene, of which 90% also carried blaCTX-M15, which is present as a subgroup of group 1. In relation to S. marcescens, 22.2% presented the blaCTX-M8 gene. Resistance to carbapenems was detected only in K. pneumoniae, with 90% having the blaKPC gene, and none the blaNDM gene. In conclusion, there was a high prevalence of K. pneumoniae CR carrying blaKPC. Among ESBL-producing bacteria, the blaCTX-M1 gene was the most common.
- Luana Vilella de Freitas
- Jaqueline Dario Capobiango
- Thaliny Leal Specian Sestak
- Mariana Eches Urbaneja Gasparotti
- Deisy Mara Lima de Oliveira
- Stefani Lino Cardim
- Alanis Cassamassimo Cardoso
- Maria Júlia Moreira Onça
- Edvaldo Rodrigues de Oliveira Júnior
- Julia da Silva Pimenta
- Eliana Carolina Vespero
- Márcia Regina Eches Perugini