{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,20]],"date-time":"2026-06-20T03:25:22Z","timestamp":1781925922447,"version":"3.54.5"},"reference-count":55,"publisher":"Public Library of Science (PLoS)","issue":"1","license":[{"start":{"date-parts":[[2024,1,26]],"date-time":"2024-01-26T00:00:00Z","timestamp":1706227200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:p>Bacterial bloodstream infections (BSI) are a common threat among patients with haematological malignancies (HM) and hematopoietic stem cell transplant recipients (HSCT). The purpose of this research was to describe clinical and microbiological aspects of BSI caused by carbapenem-resistant <jats:italic>Klebsiella pneumoniae<\/jats:italic> (CRKp) and assess risk factors associated with 30-day mortality in a 10-year cohort of haematological patients. A total of 65 CRKp-BSI episodes occurring in HM patients and HSCT recipients and CRKp-BSI between January 2010 and December 2019 were retrospectively studied. Acute leukemias were the most frequently observed underlying disease (87.7%) and 18 patients (27.7%) received HSCT. Mucosal barrier injury in the gastrointestinal tract was the primary cause of bacteremia (86.1%). Also, 14 individuals (21.6%) had an Invasive Fungal Disease (IFD) throughout the episode. Regarding treatment, in 31 patients (47.7%) empirical therapy was deemed appropriate, whereas 33 (50.8%) patients received a combination therapy. Microbiological data revealed that the majority of isolates (53\u201358%) had the Polymyxin B co-resistance phenotype, while amikacin resistance was less common (16 samples, or 24.7%). The mortality rates at 14 and 30 days were 32.3% and 36.9%, respectively. In a multivariate Cox regression analysis, prompt appropriate antibiotic administration within three days was associated with a better outcome (Adjusted Hazard Ratio [aHR]: 0.33; 95% Confidence Interval [CI]: 0.14\u20130.76; p = 0.01), whereas hypotension at presentation (aHR: 3.88; 95% CI: 1.40\u201310.74; p = 0.01) and concurrent IFD (aHR: 2.97; 95% CI: 1.20\u20137.37; p = 0.02) were independently associated with death within 30 days. Additionally, a favorable correlation between combination therapy and overall survival was found (aHR: 0.18; 95%CI: 0.06\u20130.56; p = 0.002). In conclusion, 30-day mortality CRKp-BSI was elevated and most of the isolates were polymyxin B resistant. Early appropriate antimicrobial treatment and the use of combination therapy were linked to a better outcome.<\/jats:p>","DOI":"10.1371\/journal.pone.0297161","type":"journal-article","created":{"date-parts":[[2024,1,26]],"date-time":"2024-01-26T18:31:12Z","timestamp":1706293872000},"page":"e0297161","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":15,"title":["Carbapenem-resistant Klebsiella pneumoniae bloodstream infections in haematological malignances and hematopoietic stem cell transplantation: Clinical impact of combination therapy in a 10-year Brazilian cohort"],"prefix":"10.1371","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8187-4719","authenticated-orcid":true,"given":"Ingvar Ludwig Augusto","family":"de Souza","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paola","family":"Cappellano","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Diogo Boldim","family":"Ferreira","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Daniela","family":"Bergamasco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas Cardoso","family":"das Chagas Neto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fabio Rodrigues","family":"Kerbauy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Otavio Carvalho Guimar\u00e3es","family":"Baiocchi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonio Carlos Campos","family":"Pignatari","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2024,1,26]]},"reference":[{"key":"pone.0297161.ref001","doi-asserted-by":"crossref","first-page":"1047","DOI":"10.1007\/978-3-319-64263-5_49","volume-title":"Neoplastic Diseases of the Blood.","author":"M Nucci","year":"2018"},{"key":"pone.0297161.ref002","doi-asserted-by":"crossref","first-page":"563","DOI":"10.1186\/1471-2334-13-563","article-title":"Epidemiology of bloodstream infections in patients with acute myeloid leukemia undergoing levofloxacin prophylaxis","volume":"13","author":"FG De Rosa","year":"2013","journal-title":"BMC Infect Dis"},{"issue":"1","key":"pone.0297161.ref003","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1038\/sj.bmt.1705690","article-title":"Blood stream infection after hematopoietic stem cell transplantation is associated with increased mortality","volume":"40","author":"DD Poutsiaka","year":"2007","journal-title":"Bone Marrow Transplant"},{"issue":"2","key":"pone.0297161.ref004","doi-asserted-by":"crossref","first-page":"277","DOI":"10.1007\/s10096-014-2233-5","article-title":"Infection with Klebsiella pneumoniae carbapenemase (KPC)-producing Klebsiella pneumoniae in cancer patients.","volume":"34","author":"MP Freire","year":"2014","journal-title":"Eur J Clin Microbiol Infect Dis"},{"issue":"3","key":"pone.0297161.ref005","doi-asserted-by":"crossref","first-page":"280","DOI":"10.1080\/21505594.2016.1156821","article-title":"Bloodstream infections in neutropenic cancer patients: A practical update","volume":"7","author":"G Gustinetti","year":"2016","journal-title":"Virulence"},{"key":"pone.0297161.ref006","first-page":"785","article-title":"Clinical epidemiology of the global expansion of Klebsiella pneumoniae carbapenemases.","volume-title":"The Lancet Infectious Diseases. 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