Abstract
Streptococcus agalactiae is a recognized pathogen associated with infections in neonates, elderly, and immunocompromised adults, particularly those with cancer. In the present investigation, clinical-epidemiological features, multidrug resistance profiles, and virulence genes of S. agalactiae strains isolated from cancer patients were investigated. S. agalactiae capsular distribution assays demonstrated that Ia (43.6%) and V (23.6%) types were predominantly detected among 55 clinical isolates tested; only one strain (GBS1428) was capsular type III/ST-17. The fbsB and hylB genes were detected in all isolates, while the iag, lmb, and fbsA genes were detected in 94.5%, 91%, and 91% of oncological isolates, respectively. The combination of PI-1 and PI-2a was the most common (60%) among S. agalactiae strains isolated from oncologic patients. S. agalactiae strains were resistant to tetracycline (85.5%), erythromycin (9%), and clindamycin (5.5%). Norfloxacin non-susceptible was detected in 7.3% of S. agalactiae strains. Our findings reinforce the need for S. agalactiae control measures in Brazil, including cancer patients.
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All data generated or analyzed during this study are included in this published article
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Acknowledgments
The authors acknowledge the Instituto Nacional do Câncer – INCA and Dr. Carlos Martins for providing the S. agalactiae strains.
Funding
This study was funded by the Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) [award number E-26/010.000895/2015]. This study was also financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001 and Sub Reitoria de Pós-Graduação e Pesquisa da Universidade do Estado do Rio de Janeiro (SR-2/UERJ) provided postgraduate scholarships. Finance code NIH/NINDS R01-NS051247 to KSD.
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G.F.S. and P.E.N. participated in the design and discussion of the research. G.F.S. and P.S.L.C. carried out the experimental part of the work, wrote the original draft, carried out the analysis of the data, and wrote the final manuscript. M.C.C. carried antimicrobial susceptibility. G.F.S., P.S.L.C., K.S.D., A.L.M.G., and P.E.N. contributed to literature review and manuscript discussion. All authors have read and approved the final manuscript.
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Ethical approval for the study was obtained from the Institutional Ethics Commission, Instituto Nacional do Cancer (INCA)/Rio de Janeiro Pedro Ernesto Hospital University (CONEP-CAAE: 04124313.0.0000.5259).
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de Figueiredo Sanches, G., Lannes-Costa, P.S., Cristoforêto, M.C. et al. Streptococcus agalactiae strains isolated from cancer patients in Rio de Janeiro, Brazil. Braz J Microbiol 52, 303–310 (2021). https://doi.org/10.1007/s42770-020-00419-6
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DOI: https://doi.org/10.1007/s42770-020-00419-6