High-risk clones of carbapenem resistant Klebsiella pneumoniae recovered from pediatric patients in Southern Brazil.
Braz J Microbiol
; 55(2): 1437-1443, 2024 Jun.
Article
em En
| MEDLINE
| ID: mdl-38499916
ABSTRACT
Carbapenem-resistant Klebsiella pneumoniae (CRKP) exhibit high mortality rates in pediatric patients and usually belong to international high-risk clones. This study aimed to investigate the molecular epidemiology and carbapenem resistance mechanisms of K. pneumoniae isolates recovered from pediatric patients, and correlate them with phenotypical data. Twenty-five CRKP isolates were identified, and antimicrobial susceptibility was assessed using broth microdilution. Carbapenemase production and ß-lactamase genes were detected by phenotypic and genotypic tests. Multilocus sequence typing was performed to differentiate the strains and whole-genome sequencing was assessed to characterize a new sequence type. Admission to the intensive care unit and the use of catheters were significantly positive correlates of CRKP infection, and the mortality rate was 36%. Almost all isolates showed multidrug-resistant phenotype, and most frequent resistant gene was blaKPC. We observed the dissemination of ST307 and clones belonging to CG258, which are considered high risk. In pediatric patients, these clones present with high genomic plasticity, favoring adaptation of the KPC and NDM enzymes to healthcare environments.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Beta-Lactamases
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Infecções por Klebsiella
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Testes de Sensibilidade Microbiana
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Carbapenêmicos
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Tipagem de Sequências Multilocus
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Klebsiella pneumoniae
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Antibacterianos
Limite:
Adolescent
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
País/Região como assunto:
America do sul
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Brasil
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article