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The presence of the putative Gardnerella vaginalis sialidase A gene in vaginal specimens is associated with bacterial vaginosis biofilm

(2017) PLOS ONE. 12(2).
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Abstract
Bacterial vaginosis (BV) is a difficult-to-treat recurrent condition in which health-associated lactobacilli are outnumbered by other anaerobic bacteria, such as Gardnerella vaginalis. Certain genotypes of G. vaginalis can produce sialidase, while others cannot. Sialidase is known to facilitate the destruction of the protective mucus layer on the vaginal epithelium by hydrolysis of sialic acid on the glycans of mucous membranes. This process possibly facilitates adhesion of bacterial cells on the epithelium since it has been linked with the development of biofilm in other pathogenic conditions. Although it has not been demonstrated yet, it is probable that G. vaginalis benefits from this mechanism by attaching to the vaginal epithelium to initiate biofilm development. In this study, using vaginal specimens of 120 women enrolled in the Ring Plus study, we assessed the association between the putative G. vaginalis sialidase A gene by quantitative polymerase chain reaction (qPCR), the diagnosis of BV according to Nugent score, and the occurrence of a BV-associated biofilm dominated by G. vaginalis by fluorescence in situ hybridisation (FISH). We detected the putative sialidase A gene in 75% of the G. vaginalis-positive vaginal specimens and found a strong association (p<0.001) between the presence of a G. vaginalis biofilm, the diagnosis of BV according to Nugent and the detection of high loads of the G. vaginalis sialidase A gene in the vaginal specimens. These results could redefine diagnosis of BV, and in addition might guide research for new treatment.
Keywords
STREPTOCOCCUS-PNEUMONIAE, NEURAMINIDASE, WOMEN, ACID

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Chicago
Hardy, Liselotte, Vicky Jespers, Magelien Van den Bulck, Jozefien Buyze, Lambert Mwambarangwe, Viateur Musengamana, Mario Vaneechoutte, and Tania Crucitti. 2017. “The Presence of the Putative Gardnerella Vaginalis Sialidase A Gene in Vaginal Specimens Is Associated with Bacterial Vaginosis Biofilm.” Plos One 12 (2).
APA
Hardy, L., Jespers, V., Van den Bulck, M., Buyze, J., Mwambarangwe, L., Musengamana, V., Vaneechoutte, M., et al. (2017). The presence of the putative Gardnerella vaginalis sialidase A gene in vaginal specimens is associated with bacterial vaginosis biofilm. PLOS ONE, 12(2).
Vancouver
1.
Hardy L, Jespers V, Van den Bulck M, Buyze J, Mwambarangwe L, Musengamana V, et al. The presence of the putative Gardnerella vaginalis sialidase A gene in vaginal specimens is associated with bacterial vaginosis biofilm. PLOS ONE. 2017;12(2).
MLA
Hardy, Liselotte, Vicky Jespers, Magelien Van den Bulck, et al. “The Presence of the Putative Gardnerella Vaginalis Sialidase A Gene in Vaginal Specimens Is Associated with Bacterial Vaginosis Biofilm.” PLOS ONE 12.2 (2017): n. pag. Print.
@article{8516255,
  abstract     = {Bacterial vaginosis (BV) is a difficult-to-treat recurrent condition in which health-associated lactobacilli are outnumbered by other anaerobic bacteria, such as Gardnerella vaginalis. Certain genotypes of G. vaginalis can produce sialidase, while others cannot. Sialidase is known to facilitate the destruction of the protective mucus layer on the vaginal epithelium by hydrolysis of sialic acid on the glycans of mucous membranes. This process possibly facilitates adhesion of bacterial cells on the epithelium since it has been linked with the development of biofilm in other pathogenic conditions. Although it has not been demonstrated yet, it is probable that G. vaginalis benefits from this mechanism by attaching to the vaginal epithelium to initiate biofilm development. In this study, using vaginal specimens of 120 women enrolled in the Ring Plus study, we assessed the association between the putative G. vaginalis sialidase A gene by quantitative polymerase chain reaction (qPCR), the diagnosis of BV according to Nugent score, and the occurrence of a BV-associated biofilm dominated by G. vaginalis by fluorescence in situ hybridisation (FISH). We detected the putative sialidase A gene in 75\% of the G. vaginalis-positive vaginal specimens and found a strong association (p{\textlangle}0.001) between the presence of a G. vaginalis biofilm, the diagnosis of BV according to Nugent and the detection of high loads of the G. vaginalis sialidase A gene in the vaginal specimens. These results could redefine diagnosis of BV, and in addition might guide research for new treatment.},
  articleno    = {e0172522},
  author       = {Hardy, Liselotte and Jespers, Vicky and Van den Bulck, Magelien and Buyze, Jozefien and Mwambarangwe, Lambert and Musengamana, Viateur and Vaneechoutte, Mario and Crucitti, Tania},
  issn         = {1932-6203},
  journal      = {PLOS ONE},
  language     = {eng},
  number       = {2},
  pages        = {11},
  title        = {The presence of the putative Gardnerella vaginalis sialidase A gene in vaginal specimens is associated with bacterial vaginosis biofilm},
  url          = {http://dx.doi.org/10.1371/journal.pone.0172522},
  volume       = {12},
  year         = {2017},
}

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