Pseudomonas aeruginosa Isolates from Spanish Children: Occurrence in Faecal Samples, Antimicrobial Resistance, Virulence, and Molecular Typing

Ruiz-Roldán, L. ; Bellés, A. ; Bueno, J. ; Azcona-Gutiérrez, J.M. ; Rojo-Bezares, B. ; Torres, C. ; Castillo, F.J. (Universidad de Zaragoza) ; Sáenz, Y. ; Seral, C. (Universidad de Zaragoza)

Resumen: Pseudomonas aeruginosa is a major opportunistic human pathogen, responsible for nosocomial infections and infections in patients with impaired immune systems. Little data exist about the faecal colonisation by P. aeruginosa isolates in healthy humans. The occurrence, antimicrobial resistance phenotype, virulence genotype, and genetic lineages of P. aeruginosa from faecal samples of children from two different Spanish regions were characterised. Seventy-two P. aeruginosa were isolated from 1,443 faecal samples. Low antimicrobial resistance levels were detected: ceftazidime (8%), cefepime (7%), aztreonam (7%), gentamicin (3%), ciprofloxacin (1%), and imipenem (1%); susceptibility to meropenem, amikacin, tobramycin, levofloxacin, and colistin. Four multidrug-resistant strains were found. Important differences were detected between both geographical regions. Forty-one sequence types were detected among the 48 tested strains. Virulence and quorum sensing genes were analysed and 13 virulotypes were detected, being 26 exoU-positive strains. Alteration in protein OprD showed eight different patterns. The unique imipenem-resistant strain showed a premature stop codon in OprD. Intestinal colonisation by P. aeruginosa, mainly by international clones (as ST244, ST253, and ST274), is an important factor for the systemic infections development and the environmental dissemination. Periodic active surveillance is useful to identify these community human reservoirs and to control the evolution of antibiotic resistance and virulence activity.

Idioma: Inglés

DOI: 10.1155/2018/8060178

Año: 2018

Publicado en: BioMed Research International 2018, Artc ID 8060178 (2018), [8]
ISSN: 2314-6133

Factor impacto JCR: 2.197 (2018)

Categ. JCR: MEDICINE, RESEARCH & EXPERIMENTAL rank: 81 / 135 = 0.6 (2018) - Q3 - T2
Categ. JCR: BIOTECHNOLOGY & APPLIED MICROBIOLOGY rank: 94 / 162 = 0.58 (2018) - Q3 - T2

Factor impacto SCIMAGO: 0.795 - Biochemistry, Genetics and Molecular Biology (miscellaneous) (Q2) - Medicine (miscellaneous) (Q2) - Immunology and Microbiology (miscellaneous) (Q2)

Financiación: info:eu-repo/grantAgreement/ES/ISCIII-FIS/PI12-01276
Financiación: info:eu-repo/grantAgreement/ES/ISCIII/PI16-01381

Tipo y forma: Article (Published version)

Área (Departamento): Área Microbiología (Dpto. Microb.Med.Pr.,Sal.Públ.)