Q7
(a) (i) Define 'drowning'. Enumerate the different modes of death in a case of drowning. List the postmortem findings in a case of wet drowning. 10 marks (ii) Describe Diatom Test and enumerate its limitations. 5 marks (b) (i) Enumerate four major primary glomerulonephritides presenting with nephrotic syndrome. Describe pathogenesis, light microscopic, immunofluorescence microscopy and electron microscopic findings of post-infectious glomerulonephritis. 2+8=10 marks (ii) Describe steps of wound healing by first intention. Enumerate factors that influence tissue repair. 10 marks (c) (i) Describe the role of nitrates, their route of administration and their side effects while being used in the management of angina pectoris. 5 marks (ii) Discuss in brief the mechanism of action and the therapeutic uses of Exenatide. 5 marks (iii) Enumerate the advantages of artemisinin-based combination therapies in the treatment of malaria. 5 marks
हिंदी में प्रश्न पढ़ें
(a) (i) 'डूबना' को परिभाषित कीजिए। डूबने के मामले में मृत्यु किस-किस प्रकार से हो सकती है, उसे गिनाइए। आर्द्र डूबने (वेट ड्राउनिंग) के मामले में (मरणोत्तर) शव परीक्षा करने पर क्या-क्या परिणाम प्राप्त होंगे, उनकी सूची बनाइए। 10 (ii) डायटम परीक्षण का वर्णन कीजिए तथा उसकी सीमाओं को गिनाइए। 5 (b) (i) ऐसी चार प्रमुख प्राथमिक स्तवकुंकुक्षोथों के नाम गिनाइए जो अपवृक्कीय संलक्षण के रूप में प्रस्तुत होते हैं। संक्रमण-पश्च स्तवकुंकुक्षोथ के विकृतिजनन, प्रकाश सूक्ष्मदर्शी, इम्यूनो-प्रतिदीप सूक्ष्मदर्शी तथा इलेक्ट्रॉन सूक्ष्मदर्शी विशिष्टताओं का वर्णन कीजिए। 2+8=10 (ii) घाव के प्राथमिक विरोहण के विभिन्न चरणों का वर्णन कीजिए। उतकीय विरोहण को कौन-कौन से तत्व प्रभावित करते हैं, उन्हें गिनाइए। 10 (c) (i) एंजाइना पेक्टोरिस के प्रबंधन में नाइट्रेटों की भूमिका, उन्हें देने का मार्ग तथा उनके अनुषंगी प्रभावों का वर्णन कीजिए। 5 (ii) एक्सेनाटाइड के कार्य करने की क्रियाविधि तथा चिकित्सार्थ उपयोगों की संक्षेप में चर्चा कीजिए। 5 (iii) मलेरिया के उपचार में आर्टेमिसिनिन-आधारित संयोजन चिकित्साओं के लाभ गिनाइए। 5
Directive word: Describe
This question asks you to describe. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.
See our UPSC directive words guide for a full breakdown of how to respond to each command word.
How this answer will be evaluated
Approach
The directive 'describe' demands detailed, structured exposition of mechanisms, findings and processes across all sub-parts. Allocate approximately 30% of time to (a) forensic medicine [15 marks], 40% to (b) pathology [20 marks], and 30% to (c) pharmacology [15 marks]. Structure as: brief definitions → detailed mechanisms/findings → clinical applications → limitations/factors affecting outcome. For (b)(i), prioritize electron microscopy details; for wound healing, include a labeled diagram.
Key points expected
- (a)(i) Drowning definition: submersion/asphyxiation in liquid; modes of death (asphyxia, syncope, vagal inhibition, exhaustion); wet drowning PM findings (froth, water in lungs, silt/sand in stomach, washerwoman's hands, cadaveric spasm)
- (a)(ii) Diatom test principle: acid digestion of tissues + microscopic identification of siliceous algae; limitations (contamination, false positives from water ingestion, false negatives in dry drowning, seasonal variation, need for quantitative analysis)
- (b)(i) Four primary GN with nephrotic syndrome: minimal change disease, membranous nephropathy, focal segmental glomerulosclerosis, membranoproliferative GN; post-infectious GN pathogenesis (immune complex deposition post-streptococcal), LM hypercellularity, IF 'starry sky' pattern, EM subepithelial 'humps'
- (b)(ii) Wound healing by first intention: immediate apposition, minimal granulation tissue, rapid epithelialization; factors influencing repair (local: infection, foreign body, blood supply; systemic: age, nutrition, diabetes, steroids, smoking)
- (c)(i) Nitrates in angina: venodilation → preload reduction, coronary vasodilation; routes (sublingual, buccal, oral, transdermal, IV); side effects (headache, hypotension, reflex tachycardia, tolerance)
- (c)(ii) Exenatide: GLP-1 receptor agonist, glucose-dependent insulin secretion, suppression of glucagon, delayed gastric emptying; uses (T2DM, weight reduction, cardiovascular benefit)
- (c)(iii) ACT advantages: rapid parasite clearance, reduced gametocyte carriage, delayed resistance emergence, shorter treatment courses, efficacy against multidrug-resistant P. falciparum
Evaluation rubric
| Dimension | Weight | Max marks | Excellent | Average | Poor |
|---|---|---|---|---|---|
| Concept correctness | 25% | 12.5 | Precise definitions (drowning, first intention healing), accurate pathogenetic mechanisms (post-infectious GN immune complex deposition, nitrate NO-mediated vasodilation), correct microscopic findings (EM humps, IF patterns), and exact pharmacological mechanisms (GLP-1 receptor signaling, artemisinin endoperoxide bridge activation) | Broadly correct concepts with minor errors in mechanism details (e.g., confusing subepithelial vs subendothelial deposits, vague nitrate mechanism) or incomplete microscopic descriptions | Fundamental errors (confusing wet vs dry drowning pathophysiology, wrong healing process described, incorrect receptor for exenatide, missing artemisinin mechanism) |
| Clinical correlation | 20% | 10 | Explicit links: drowning diagnosis in medicolegal context, nephrotic syndrome clinical presentation correlating with pathology, wound healing factors applied to surgical outcomes, nitrate tolerance management in chronic angina, exenatide cardiovascular outcomes (LEADER trial), ACT in Indian malaria control (NVBDCP guidelines) | Some clinical connections made but superficial or missing evidence-based correlations (e.g., mentioning nitrates work without addressing tolerance, or ACT without resistance context) | Purely theoretical answer with no clinical application; no mention of forensic significance, patient outcomes, or public health relevance |
| Diagram / pathway | 20% | 10 | Clear labeled diagram for wound healing by first intention (showing wound edges, neutrophils, fibroblasts, collagen, epithelial tongue); OR structured flowchart for post-infectious GN pathogenesis (strep infection → immune complex → complement activation → glomerular injury); OR nitrate NO-cGMP pathway | Attempted diagram with minor labeling errors or text description substituting for visual representation; incomplete pathway description | No diagram where essential (especially wound healing); purely narrative description of spatial/temporal processes that require visualization |
| Differential / staging | 15% | 7.5 | Clear differentiation: wet vs dry drowning vs near-drowning; four primary GN distinguished by age, presentation, and pathology; phases of wound healing (inflammatory, proliferative, maturation) with timelines; nitrate formulations compared by onset and duration; ACT combinations differentiated (artemether-lumefantrine vs artesunate-amodiaquine) | Lists differentials without distinguishing features; mentions phases without temporal correlation; incomplete comparison of pharmacological alternatives | No differentiation attempted; conflates distinct entities (e.g., post-infectious GN with rapidly progressive GN, or confuses first vs second intention healing) |
| Management / public-health angle | 20% | 10 | Forensic: diatom test as adjunct to circumstantial evidence in drowning; Pathology: prognostic factors in GN, prevention of wound infection; Pharmacology: nitrate-free interval to prevent tolerance, exenatide as alternative to insulin in obese diabetics, ACT as first-line per WHO/Indian national guidelines to prevent artemisinin monotherapy and resistance | Mentions management in passing without evidence-based specifics; generic statements about prevention without programmatic context | No management or public health perspective; ignores forensic utility, therapeutic decision-making, or population-level drug policy |
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