Abstract
Polymicrobial lung infections in individuals with Cystic Fibrosis (CF) contribute to the complexity of this disease and are a major cause of morbidity and mortality in the CF community. The microorganisms most commonly associated with severe airway infections in individuals with CF are the opportunistic pathogens S. aureus, P. aeruginosa and bacteria from the Burkholderia cepacia complex (Bcc), particularly B. cenocepacia and B. multivorans. Three Bcc strains, two S. aureus wild-type strains, and two derivative mutants were used to investigate the interplay between S. aureus and Bcc with a focus on the hemolytic activity of Bcc. Our results revealed that extracellular products from S. aureus potentiated the hemolysis of Bcc strains. Moreover, this effect was influenced by the composition of the medium in which S. aureus is grown. These findings contribute towards the understanding of the impact of interactions between S. aureus and Bcc and their possible implications in the context of co-infections by these pathogens in individuals with CF.
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Acknowledgements
We want to thank Lorena Tuchscherr de Hauschopp for the mutant LS1 Δagr and Jovanka Voyich de Montana for the USA300 Δhla mutant.
Funding
Research reported in this publication was in part supported by the 2019–20 Junior/Senior Intramural Grant 0357019 to M.S.R. and the National Institute of Allergy and Infectious Diseases of the National Institutes of Health (NIH) to M.S.R under Award Numbers SC3GM125556 and to R.A.B. under Award Numbers R01AI100560, R01AI063517, and R01AI072219. This study was also supported in part by funds and/or facilities provided by the Cleveland Department of Veterans Affairs, Award Numbers 1I01BX002872 to K.M.P.-W. and 1I01BX001974 to R.A.B. from the Biomedical Laboratory Research & Development Service of the VA Office of Research and Development, and the Geriatric Research Education and Clinical Center VISN 10. Cystic Fibrosis Foundation #691309 also support the laboratory of KMP-W. D.O.S is a member of the National Research Council of Argentina (CONICET). S.M is recipient of a postdoctoral fellowship from CONICET. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH, the Department of Veterans Affairs or the United States Government.
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1) Conception and design of the study: AM, DS, JD, MSR; 2) Acquisition and analysis of data: AM, DS, AH, SM, JD, MSR; 3) Drafting and revision of manuscript: AM, DS, SM, JD, RB, KPW, MSR.
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Moriano, A., Serra, D.O., Hoard, A. et al. Staphylococcus aureus Potentiates the Hemolytic Activity of Burkholderia cepacia Complex (Bcc) Bacteria. Curr Microbiol 78, 1864–1870 (2021). https://doi.org/10.1007/s00284-021-02458-0
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DOI: https://doi.org/10.1007/s00284-021-02458-0