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High rate of inappropriate antibiotics in patients with hematologic malignancies and pseudomonas aeruginosa cacteremia following international guideline recommendations

Abstract: Optimal coverage of Pseudomonas aeruginosa is challenging in febrile neutropenic patients due to a progressive increase in antibiotic resistance worldwide. We aimed to detail current rates of resistance to antibiotics recommended by international guidelines for P. aeruginosa isolated from bloodstream infections (BSI) in patients with hematologic malignancies. Secondarily, we aimed to describe how many patients received inappropriate empirical antibiotic treatment (IEAT) and its impact on mortality. We conducted a retrospective, multicenter cohort study of the last 20 BSI episodes caused by P. aeruginosa in patients with hematologic malignancies from across 14 university hospitals in Spain. Of the 280 patients with hematologic malignancies and BSI caused by P. aeruginosa, 101 (36%) had strains resistant to at least one of the ?-lactam antibiotics recommended in international guidelines, namely, cefepime, piperacillin-tazobactam, and meropenem. Additionally, 21.1% and 11.4% of the strains met criteria for MDR and XDR P. aeruginosa, respectively. Even if international guidelines were followed in most cases, 47 (16.8%) patients received IEAT and 66 (23.6%) received inappropriate ?-lactam empirical antibiotic treatment. Thirty-day mortality was 27.1%. In the multivariate analysis, pulmonary source (OR 2.22, 95% CI?1.14 to 4.34) and IEAT (OR 2.67, 95% CI?1.37 to 5.23) were factors independently associated with increased mortality. We concluded that P. aeruginosa-causing BSI in patients with hematologic malignancies is commonly resistant to antibiotics recommended in international guidelines, which is associated with frequent IEAT and higher mortality. New therapeutic strategies are needed.

 Fuente: Microbiology Spectrum, 2023, 11, 4

 Editorial: ASM Press

 Año de publicación: 2023

 Nº de páginas: 8

 Tipo de publicación: Artículo de Revista

 DOI: 10.1128/spectrum.00674-23

 ISSN: 2165-0497

 Url de la publicación: https://doi.org/10.1128/spectrum.00674-23

Autoría

CHUMBITA, MARIANA

PUERTA-ALCALDE, PEDRO

CUESTA, MARÍA ÁNGELES

CHINEA, ANABELLE

ESPAÑOL-MORALES, IGNACIO

FERNÁNDEZ-ABELLÁN, PASCUAL

GUDIOL, CARLOTA

GONZÁLEZ-SIERRA, PEDRO

ROJAS, RAFAEL

SÁNCHEZ-PINA, JOSÉ MARÍA

SÁNCHEZ VADILLO, IRENE

SANCHEZ, MIGUEL

VARELA, ROSARIO

VÁZQUEZ, LOURDES

GUERREIRO, MANUEL

MONZO, PATRICIA

LOPERA, CARLOS

AIELLO, TOMMASO FRANCESCO

PEYRONY, OLIVER