Newer azoles and investigational agents with higher Erg11 binding
affinity (or alternative binding modes) may retain activity against some
ERG11 variants, but cross-resistance is common and requires
isolate-specific testing. Several clinical investigations show that infections caused by isolates
with ERG11 substitutions (e.g., Y132F) are associated with higher rates
of therapeutic failure or recurrence when fluconazole is used,
underscoring the clinical relevance of genotyping in selected cases.
Public health surveillance
that tracks ERG11 mutation prevalence can inform regional guideline
adjustments (e.g., reducing fluconazole prophylaxis) to prevent
selection and spread of resistant clones.
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