In vitro study to assess modulation of Candida biofilm by Escherichia coli from vaginal strains

Autor: Marta Díaz-Navarro, Álvaro Irigoyen Von-Sierakowski, María Palomo, Pilar Escribano, Jesús Guinea, Almudena Burillo, Alicia Galar, Patricia Muñoz, María Guembe
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Biofilm, Vol 5, Iss , Pp 100116- (2023)
Druh dokumentu: article
ISSN: 2590-2075
DOI: 10.1016/j.bioflm.2023.100116
Popis: Background: Vulvovaginal candidiasis (VVC) is caused by biofilm formation and epithelial invasion. In addition, Escherichia coli (EC) can establish a vaginal intracellular reservoir modulating Candida spp. biofilm production. We aimed to analyze the behavior of Candida albicans (CA) and EC biofilm both in single cultures and in co-cultures. Methods: We prospectively collected CA and EC isolates from vaginal swabs over 6 months. We selected positive cultures with both CA and EC (cases) and a comparator group with either CA or EC (controls). We analyzed overall biomass production and metabolic activity in single cultures and in co-cultures based on staining assays, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) to assess biofilm occupation. We also analyzed clinical manifestations. Results: We cultured 455 samples, 16 (3.5%) of which had CA and EC (cases); only CA or EC (controls) was detected, respectively, in 72 (15.8%) and 98 (21.5%). Biomass production and metabolic activity were significantly more pronounced in co-cultures in both groups. CLSM and SEM, on the other hand, showed the biofilm of each species to be significantly reduced when they were cultured together, with higher values in CA (percentage biofilm reduction: CA, 95.8% vs. EC, 36.2%, p
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