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Updated: Jul 17, 2026

Whole Genome Sequencing of Candida glabrata for Detection of Markers of Antifungal Drug Resistance
Published on: December 28, 2017
Risk of resistance associated with fluconazole prophylaxis: systematic review
Luc P Brion1, Smart E Uko, David L Goldman
1Division of Neonatology, Department of Pediatrics, Albert Einstein College of Medicine, Children's Hospital at Montefiore, USA. brionlp@aol.com <brionlp@aol.com>
Background:
Several studies have shown that fluconazole prophylaxis reduces the risk of fungal colonization and of invasive fungal infection in high-risk patients with minimal toxicity. This systematic review was designed to estimate the risk of emergence of colonization and infection either with azole susceptible-dose dependent or with resistant strains.
Methods:
We searched Medline, EMBASE, the Cochrane Collaboration database and our own files for randomized controlled trials assessing the effect of fluconazole on the incidence of fluconazole-resistant strains.
Results:
This systematic review of randomized clinical trials shows that fluconazole prophylaxis increases the risk for colonization with fluconazole susceptible-dose dependent or with resistant yeasts, the percentage of non-albicans Candida isolates and the percentage of fluconazole susceptible-dose dependent or resistant fungal isolates. Fluconazole prophylaxis did not significantly affect the risk of invasive disease with fluconazole susceptible-dose dependent or resistant fungi. The sample size was too small to assess the effect of fluconazole prophylaxis on the risk for breakthrough infections with non-albicans Candida.
Conclusion:
Evidence from randomized trials suggests that fluconazole prophylaxis increases the risk for colonization with fluconazole susceptible-dose dependent or with resistant fungi, but does not significantly affect the risk for invasive infections with fluconazole susceptible-dose dependent or with resistant fungi. The risk for breakthrough infections remains a concern and needs to be addressed in large prospective studies.
Insights
Fluconazole prophylaxis increases the risk of fungal colonization with resistant strains, but does not significantly impact invasive fungal infections. Further research is needed on breakthrough infections.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Clinical Pharmacology
Background:
- Fluconazole prophylaxis is known to reduce fungal colonization and invasive infections in high-risk patients.
- Concerns exist regarding the emergence of azole-susceptible dose-dependent or resistant fungal strains with prophylaxis.
Purpose of the Study:
- To systematically review randomized controlled trials (RCTs) on fluconazole prophylaxis.
- To estimate the risk of colonization and infection with fluconazole-resistant fungal strains.
Main Methods:
- Systematic review of randomized controlled trials.
- Searched Medline, EMBASE, Cochrane Collaboration database, and internal files.
- Focused on trials assessing fluconazole's effect on fluconazole-resistant strain incidence.
Main Results:
- Fluconazole prophylaxis increased colonization risk with susceptible-dose dependent or resistant yeasts and non-albicans Candida.
- No significant effect on the risk of invasive disease with resistant fungi was observed.
- Sample size limited assessment of breakthrough infections with non-albicans Candida.
Conclusions:
- Randomized trial evidence indicates fluconazole prophylaxis elevates colonization risk with resistant fungi.
- Prophylaxis did not significantly alter the risk of invasive infections by resistant fungi.
- The risk of breakthrough infections warrants further investigation in large prospective studies.
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