ArticleEuropean journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology2025
The impact of fluconazole use on the fungal and bacterial microbiomes in recurrent Vulvovaginal Candidiasis (RVVC): a pilot study of vaginal and gastrointestinal site interplay.
Article in European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Abstract
purposeRecurrent Vulvovaginal Candidiasis (RVVC) is a problematic clinical condition for which fluconazole treatment is commonly prescribed. This study investigated the interkingdom vaginal and gastrointestinal microbiomes of RVVC patients who use fluconazole intermittently or as longer-term maintenance therapy for symptom management and compared them to healthy controls.
methodsVaginal swabs and fecal samples were collected. A novel interkingdom analysis was performed using 16 S rRNA and ITS1 gene sequencing to compare the diversity and taxonomic composition of vaginal microbiome (VMB) and gastrointestinal microbiome (GIMB).
resultsTwenty-seven women participated: 10 intermittent users and healthy controls and 7 maintenance therapy. The study revealed that microbiomes of fluconazole users do not differ in diversity metrics from healthy controls. RVVC patients using intermittent fluconazole displayed a higher abundance of vaginal C. albicans than healthy controls. Candida species pairings were not commonly observed between sites in individuals and, as such a fecal reservoir is unlikely to be implicated in recurrent symptomatology. In many of the RVVC non-Candida fungal spp. were identified in the vaginal microbiome. Users of fluconazole displayed elevations of the CST-I (Community State Type 1) associated bacterium L. crispatus. All participants displaying vaginal Candida spp. belonged to either bacterial CST-I or CST-III (Community State Type 3- L. iners associated).
conclusionTo our knowledge, this is the first study to compare the interkingdom VMB-GIMB of women with RVVC using oral fluconazole. As fluconazole users in this study represent a typical RVVC population, trends observed in microbial abundance require further analysis to establish fluconazole's long-term microbiome safety. Examining the microbiome at both sites adds to the current understanding of microbial associated with the condition.
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