Antifungal prophylaxis: identification of preterm neonates at high risk for invasive fungal infection.

We read with great interest the article by Healy et al,1 who evaluated the impact of fluconazole prophylaxis (FP) for extremely low birth weight infants on invasive candidiasis (IC) incidence, IC-related mortality rates, and fluconazole susceptibility of Candida isolated. We wish to make some comments thereon. Healy et al1 demonstrated a decrease of IC in NICU infants, after the introduction of FP, from 0.6% to 0.3%, and a 3.6 fold decrease in ELBW infants. Recent studies have demonstrated that prophylactic use of fluconazole is effective in reducing the incidence of fungal colonization and fungal systemic infections in preterm neonates.2,3 However, because of the lack of larger multicenter randomized trials and data on long term neurodevelopment outcomes as well as concern about unwanted side effects and development of Candida resistance, FP in high risk infants remains controversial. For these reasons, selecting only those infants at highest risk for IC may delay or prevent the emergence of resistance. In recent studies, the criteria chosen to identify \u201cthe high-risk neonate\u201d were