Systematic review and meta-analysis shows antifungal resistance rates vary in diabetic foot ulcer patients

Diabetic foot ulcers (DFUs) are one of the most serious and common complications that, if not treated properly, can lead to potential damage and even amputation. The aim of this systematic review and meta-analysis was to assess the drug-resistant Candida species in DFU. PubMed, Web of Science, Scopus and Google Scholar databases were systematically searched for eligible articles up to 22 June 2024. All articles on Candida diabetic foot infections that reported data on drug resistance were included in the study. In addition to general information, data on the type and number of fungi and the percentage of resistance to each drug were collected for analysis. A total of 238 studies were screened and finally, 16 articles were selected and analysed. Candida albicans was the most frequently isolated species in DFUs, followed by Candida tropicalis and Candida parapsilosis. For antifungal agents, the highest resistance was reported to Nystatin (32.48%, p-value = 0.30), Itraconazole (19.46%, p-value = 0.001) and Fluconazole (16.4%, p-value = 0.001). Miconazole (1.18%, p-value = 0.54) and Caspofungin (4.69%, p-value = 0.01) had the lowest resistance rates. For all drugs, resistance was higher in C. albicans than in non-albicans. This study found that antifungal drug resistance in Candida species is high in patients with DFUs, especially to itraconazole and fluconazole. Caspofungin, micafungin and voriconazole were more effective. Antifungal treatment in these patients should prioritize agents with lower resistance rates to improve outcomes and reduce the risk of treatment failure. Protocol Registration: PROSPERO-CRD42024567133.