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DR7.1-2 | Fungal Infections — Assignment
CLINICAL SCENARIO
India is experiencing an epidemic of chronic, recalcitrant superficial fungal infections — a public-health crisis driven by misuse of topical corticosteroid-antifungal combination creams and the emergence of terbinafine-resistant Trichophyton indotineae. In this assignment, you will critically evaluate a clinical scenario involving a patient with recalcitrant tinea and demonstrate integrated competency in KOH mount interpretation, clinical diagnosis, rational antifungal prescribing, and patient counselling. You will also analyse the systemic drivers of this epidemic and propose a community-level response.
Instructions
Write a structured clinical analysis based on the case vignette provided. Your response should demonstrate integration of laboratory skills (KOH mount interpretation), clinical diagnostic reasoning, evidence-based management, and public-health awareness. Use sub-headings for each section as guided below. Cite clinical references where appropriate (IADVL guidelines, WHO, Neena Khanna's Illustrated Synopsis, or equivalent). Word limit: 1,200–1,800 words total.
Length: Total: 1,200–1,800 words. Section-level word guidance is provided as a target; you may adjust within the total word limit.
What to Submit
Use this case to structure your clinical analysis below.
Demonstrate knowledge of KOH technique, characteristic fungal morphologies, and awareness of the mosaic fungus artefact.
Demonstrate understanding of how topical corticosteroid misuse distorts the clinical appearance of tinea ('tinea incognito').
Demonstrate resistance-aware, evidence-based prescribing and contact management.
Demonstrate communication skill: translate clinical knowledge into patient-centred, plain-language counselling.
Demonstrate understanding of the systemic, prescribing, and regulatory dimensions of the dermatophytosis epidemic.
Grading Rubric — Fungal Infections Assignment Rubric
| Criterion | Points | Full-marks descriptor |
|---|---|---|
| KOH Interpretation Accuracy (Section 1): Correctly describes septate hyphae for T. indotineae; accurately distinguishes from Candida (pseudohyphae + budding yeast) and Malassezia (spaghetti and meatballs); correctly identifies mosaic fungus artefact and its distinguishing features. | 20 pts | All three organisms described with complete morphological accuracy; artefact identified with clear distinguishing criteria (crosses cell boundaries, uniform width, geometric pattern). |
| Diagnosis and Steroid-Distortion Mechanism (Section 2): Correctly names tinea cruris/corporis caused by T. indotineae; accurately explains how topical betamethasone suppresses the immune response, prevents central clearing, and creates 'tinea incognito' with polycyclic plaques. | 15 pts | Correct site-specific diagnosis named; mechanism of tinea incognito explained with pharmacological accuracy (corticosteroid immunosuppression → loss of central clearing → spread). |
| Resistance-Aware Management (Section 3): Correctly stops all steroid combination creams; prescribes oral itraconazole (not terbinafine) with correct dose and duration for T. indotineae; addresses contact management for family members. | 25 pts | Immediately stops combination creams (with correct pharmacological rationale); prescribes itraconazole 200 mg/day for 4–8 weeks with clear resistance-based rationale; correctly manages family contacts (screen + treat if KOH positive). |
| Patient Counselling Quality (Section 4): Plain language appropriate for patient literacy level; covers course completion, hygiene measures, avoidance of steroid creams, and when to return; empathetic and non-judgmental tone. | 20 pts | All four counselling domains covered in plain, accessible language; empathetic tone; explicitly tells patient to avoid combination creams even if pharmacist recommends them. |
| Public-Health Analysis (Section 5): Analyses OTC combination cream misuse, T. indotineae terbinafine resistance mechanism (SQLE mutation), and proposes at least one realistic PHC-level intervention with rationale. | 20 pts | All three dimensions addressed; resistance mechanism explained at molecular level (squalene epoxidase mutation); proposed intervention is realistic, specific, and contextualised for Indian PHC. |
PEER REVIEW
Review your peer's assignment using the rubric criteria. Provide specific, constructive feedback for each section. Note: (1) Are the KOH morphologies accurately described and differentiated? (2) Is the management resistance-aware — does it choose itraconazole over terbinafine for T. indotineae, and does it stop steroid combination creams? (3) Is the patient counselling in plain language appropriate for a semi-literate patient? (4) Does the public-health analysis go beyond the obvious? Avoid vague comments like 'good work' — support every rating with specific evidence from the text. Peer review must be a minimum of 300 words.