Abstract
Burkholderia sp. infections are extremely complex in cystic fibrosis (CF) patients, especially considering the lack of knowledge regarding its behavior, its relationship with prognosis, as well as its transmissibility and multidrug resistance features. This study evaluated the frequency of chronic infection by Burkholderia, using microbiological and clinical data. Ninety-eight patients with CF attended from July 2011 to April 2014 in a Brazilian reference hospital were included. Antimicrobial activity, molecular epidemiology, Shwachman score, body mass index, exacerbations, and lung function were analyzed. Nine patients had chronic colonization, and all of them showed preserved pulmonary function levels, body mass index, and Shwachman score. Meropenem was the most effective antibiotic; however, divergent results were shown by other studies. Cross-contamination may have occurred in only two unrelated patients of different ages, who were colonized by B. vietnamiensis, which does not occur frequently. Twelve new sequence types (STs) were identified and three STs have presented intercontinental distribution. None of the patients presented known epidemic strains. In conclusion, a relatively low number of patients with chronic colonization and suspected cross-infection were identified. Different from other studies that have found CF patients chronically colonized with Burkholderia sp. having a greater deterioration of lung function, more frequent antibiotic therapy, and increased mortality, in the current study, the patients showed good clinical outcomes and favorable options for antibiotics therapy. This study also updated the epidemiological database, which facilitates the multicentric collaborative analysis and assists in the control of global infection by these pathogens.
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Acknowledgments
We wish to thank Lucélia A. Pereira for the Vitek® 2 identification of isolates and Joseane C. Ferreira and Rubens E. Silva for their technical assistance. We would like to thank Roberto Martinez from Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto for the clinical isolates provided. We acknowledge Elizabeth Andrade Marques from Universidade Estadual do Rio de Janeiro and Carlos Emílio Levy from Universidade Estadual de Campinas, who kindly provided standard strains used as controls.
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This study was funded by the São Paulo Research Foundation (FAPESP, grant number 2014/14494-8). CPCC and NCC were supported by PhD fellowships from the FAPESP (grant numbers 2013/13455-6 and 2013/13358-0).
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The authors declare that they have no conflict of interest.
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The study was approved by the Research Ethics Committee of Faculdade de Ciências Farmacêuticas de Ribeirão Preto of the University of Sao Paulo by the number 210, with the agreement of the Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto, University of São Paulo (HCFMRP-USP).
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Informed consent was obtained from all individual participants included in the study.
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da Costa Capizzani, C.P., Caçador, N.C., Torres, L.A.G.M.M. et al. Clinical and microbiological profile of chronic Burkholderia cepacia complex infections in a cystic fibrosis reference hospital in Brazil. Eur J Clin Microbiol Infect Dis 36, 2263–2271 (2017). https://doi.org/10.1007/s10096-017-3058-9
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DOI: https://doi.org/10.1007/s10096-017-3058-9