Phenotypic and genotypic analysis of biofilm production by Pseudomonas aeruginosa isolates from infection and colonization samples
Rev. Soc. Bras. Med. Trop
; Rev. Soc. Bras. Med. Trop;53: e20200399, 2020. tab, graf
Article
em En
| SES-SP, ColecionaSUS, LILACS
| ID: biblio-1136908
Biblioteca responsável:
BR1.1
ABSTRACT
Abstract INTRODUCTION:
Pseudomonas aeruginosa is an opportunistic pathogen associated with healthcare-related infections, affecting mainly patients with underlying diseases and immunosuppression. This microorganism has several virulence mechanisms that favour its pathogenesis, including the production of biofilm. This study aimed to analyze the phenotypic production of biofilms, the occurrence of quorum sensing (QS) genes, and the clonal profile of clinical isolates of P. aeruginosa from colonized/infected patients in a tertiary hospital in Recife-PE.METHODS:
We obtained 21 isolates that were classified as infection isolates (II), and 10 colonization isolates (CI). The phenotypic analysis for biofilm production was performed quantitatively. The QS genes were detected by specific PCRs, and the clonal profile was assessed using ERIC-PCR.RESULTS:
Of the 31 isolates, 58.1 % (18/31) were biofilm producers, of which 70 % (7/10) were CI and classified as weakly adherent; 52.4 % (11/21) of the II produced biofilms, and were classified as weak (38.1 %, (8/21)), moderate (9.5 %, (2/21)), and strongly adherent (4.8 %, (1/21)). All isolates harbored the QS genes analyzed. In the clonal analysis, 26 distinct genetic profiles were identified, highlighting the presence of a clone in four samples, i.e., one infection isolate, and 3 colonization isolates.CONCLUSIONS:
The detection of biofilm formation is important in P. aeruginosa in addition to the identification of colonization and infection isolates, especially from complex environments such as ICUs. Further, we define a strategy for monitoring and analyzing P. aeruginosa strains that can potentially cause infections in hospitalized patients.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
/
SES-SP
/
ColecionaSUS
Assunto principal:
Pseudomonas aeruginosa
/
Infecções por Pseudomonas
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Rev. Soc. Bras. Med. Trop
Assunto da revista:
MEDICINA TROPICAL
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil