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Candida auris Shows 90% Azole Resistance; Study Reveals Gene Duplication & Eagle Effect Challenging Antifungals

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains HighStatic GK Link
16 Sept 2026
~2 min
Source: The Hindu
Key Data:>90% resistance to azole antifungals30-40% mortality rateCaspofungin survival up to 16 µg/mLStandard test limit 2 µg/mLFirst report 2009 in Japan15,000 clinical fungal isolates at PGIMER
Bodies:PGIMERJNCASBCSIR-CCMBIISER Thiruvananthapuram
Practice MCQs from today's news ▸
What This Article Covers

1.Candida auris, first reported in Japan (2009), is now a multidrug-resistant pathogen in ICUs with 30-40% mortality; >90% Indian clinical isolates resist azole antifungals like fluconazole.

2.New study in Nature Communications finds C. auris resistance mechanisms: extra copies of Erg11 gene (overproduces ergosterol) and mutations in Fks1 gene (survives caspofungin up to 16 µg/mL vs. standard 2 µg/mL limit).

3.High-dose caspofungin triggers paradoxical 'Eagle effect' – pathogen produces excess chitin to compensate cell wall damage, surviving despite the drug; scientists advocate for combination therapies and raising susceptibility test limits.

The Big Picture
Prelims · HighMains · High

Fungal infections are rising due to global warming, with Candida auris emerging as a multidrug-resistant threat (30-40% mortality). New research from JNCASB and collaborators reveals that C. auris uses gene duplication (Erg11) and mutations (Fks1) to resist antifungals, and also exhibits the 'Eagle effect' where high drug doses paradoxically trigger compensatory chitin production, making the pathogen survive. This signals the end of the chemical arms race approach and calls for combination therapies and revised susceptibility testing limits.

Exam Lens

Quick Exam Facts From News

Mortality30-40% for C. auris infections
Azole Resistance>90% clinical isolates resistant to fluconazole
Polyene Resistance~30% isolates resistant to polyenes
Caspofungin SurvivalUp to 16 µg/mL (standard test limit is 2 µg/mL)
First Report of C. auris2009, Japan
Institution RepositoryPGIMER, Chandigarh – 15,000 clinical fungal isolates

1-Minute Revision

  • ›Mortality: 30-40% for C. auris infections
  • ›Azole Resistance: >90% clinical isolates resistant to fluconazole
  • ›Target this Data: >90% Indian clinical isolates of C. auris are resistant to azole antifungals like fluconazole
  • ›Target this Data: C. auris mortality rate = 30-40% in infected patients
  • ›Target this Institution: PGIMER, Chandigarh holds a stock of 15,000 clinical fungal isolates

Mastered this topic? Test your knowledge with a full MCQ quiz.

Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

Which research institute in India holds a repository of 15,000 clinical fungal isolates that aided the study on Candida auris resistance?

Q2Statement-basedHard

Consider the following statements regarding Candida auris and antifungal resistance:

1. Candida auris was first reported in Japan in 2009.

2. The 'Eagle effect' refers to the phenomenon where a pathogen dies at lower concentrations of a drug but survives at exceptionally high concentrations due to compensatory mechanisms.

3. All clinical isolates of C. auris are resistant to azole antifungals.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the recent study, what percentage of Indian clinical isolates of Candida auris are resistant to azole-based antifungals such as fluconazole?

Q4Application/ImpactMedium

What is the primary implication of the 'Eagle effect' observed in Candida auris for clinical treatment?

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