Non-Communicable Diseases — MCQs

Non-Communicable Diseases Indian Medical PG Practice Questions and MCQs

Question 551: Targeted intervention for HIV is done for all except?

A. Commercial sex worker
B. Migrant laborers
C. Street children
D. Industrial worker (Correct Answer)

Explanation: **Explanation:** The concept of **Targeted Intervention (TI)** under the National AIDS Control Programme (NACP) is designed to provide prevention and care services to populations at the highest risk of acquiring and transmitting HIV. These populations are categorized into **High-Risk Groups (HRGs)** and **Bridge Populations**. **Why "Industrial Worker" is the correct answer:** Industrial workers, as a general category, are not classified as a high-risk or bridge population under NACP guidelines. While they are a specific workforce, they do not inherently engage in the high-risk behaviors (unprotected commercial sex or needle sharing) or the specific social vulnerabilities (constant mobility away from family) that define TI eligibility. Therefore, they are not the focus of "Targeted" interventions, though they may be reached through general awareness programs. **Analysis of Incorrect Options:** * **Commercial Sex Workers (CSW):** Classified as a **Core High-Risk Group (HRG)**. They have the highest probability of HIV transmission due to multiple sexual partners. * **Migrant Laborers:** Classified as a **Bridge Population**. They often live away from their families and may access sex workers, potentially "bridging" the infection from high-risk groups to the general population (their spouses) in rural areas. * **Street Children:** Classified as a **Vulnerable Group**. Due to lack of supervision and poverty, they are at high risk of sexual exploitation and substance abuse. **High-Yield Facts for NEET-PG:** * **Core HRGs:** Female Sex Workers (FSW), Men who have Sex with Men (MSM), Transgender/Hijras, and Injecting Drug Users (IDU). * **Bridge Populations:** Migrants and Long-distance Truckers. * **Components of TI:** Behavior Change Communication (BCC), Condom promotion, Treatment of STIs, and creating an enabling environment. * **NACP Phase V (2021-2026):** Aims to reduce new HIV infections and AIDS-related deaths by 80% by 2025.

Question 552: What measure of variability indicates how many standard deviations an observation is above or below the mean?

A. Z score (Correct Answer)
B. Standard error (S.E)
C. Standard deviation (S.D)
D. Coefficient of Variation

Explanation: **Explanation:** **1. Why the Correct Answer is Right (Z-score):** The **Z-score** (also known as the Standard Score) is a dimensionless numerical value that indicates exactly how many standard deviations an individual observation or data point is away from the mean. It is calculated using the formula: $Z = \frac{(x - \mu)}{\sigma}$ *(where $x$ is the value, $\mu$ is the mean, and $\sigma$ is the S.D.)* In Community Medicine, Z-scores are the gold standard for assessing **nutritional status** in children (e.g., Weight-for-age or Height-for-age) as they allow for comparison across different ages and genders by normalizing the distribution. **2. Why the Other Options are Incorrect:** * **Standard Error (S.E.):** This measures the variability of *sample means* around the true population mean. It indicates how much a sample mean is likely to deviate from the population mean, rather than the position of a single observation. * **Standard Deviation (S.D.):** This measures the overall dispersion or "spread" of data points around the mean for a single dataset. While the Z-score uses S.D. as a unit, the S.D. itself is an absolute value (carrying the same units as the data), not a relative position. * **Coefficient of Variation (C.V.):** This is the ratio of S.D. to the Mean expressed as a percentage ($[S.D. / Mean] \times 100$). It is used to compare the relative variability between two different groups with different units (e.g., comparing variability in height vs. weight). **3. High-Yield Clinical Pearls for NEET-PG:** * **WHO Growth Charts:** A Z-score of **< -2** indicates "Moderate" malnutrition (stunting/wasting), while **< -3** indicates "Severe" malnutrition. * **Normal Distribution:** In a Gaussian curve, a Z-score of ±1 covers **68%** of data, ±2 covers **95%**, and ±3 covers **99.7%**. * **Z-score of 0:** This means the observation is exactly equal to the mean.

Question 553: Which is the online TB notification system developed by the Central TB Division?

A. Nischinth
B. Nikshay (Correct Answer)
C. Laksha
D. Yaksma

Explanation: **Explanation:** **Nikshay** is the correct answer. It is the web-based solution for monitoring the **National Tuberculosis Elimination Programme (NTEP)**. Developed by the Central TB Division in collaboration with NIC, the name is derived from "Ni" (End) and "Kshay" (Tuberculosis). It serves as a unified interface for public and private sector notifications, treatment tracking, and the management of the **Nikshay Poshan Yojana** (Direct Benefit Transfer for nutritional support). **Analysis of Incorrect Options:** * **Nischinth:** This is not a recognized national health portal under the MoHFW. It is often used as a distractor in exams. * **Laksha (LaQshya):** This is a Quality Improvement Initiative aimed at improving the quality of care in **Labour Rooms** and Maternity Operation Theatres to reduce maternal and newborn mortality. * **Yaksma:** "Rajayakshma" is the classical Ayurvedic term for Tuberculosis (meaning "King of diseases"), but it is not the name of the digital notification system. **High-Yield Clinical Pearls for NEET-PG:** * **Notification:** TB was made a notifiable disease in India in **2012**. Failure to notify by private practitioners can lead to jail terms under Section 269/270 of the IPC. * **Nikshay Poshan Yojana:** Provides **₹500 per month** to all TB patients for the duration of their treatment. * **Target:** India aims to eliminate TB by **2025**, five years ahead of the global Sustainable Development Goal (SDG) of 2030. * **90-90-90 Target:** 90% notification, 90% treatment initiation, and 90% treatment success.

Question 554: A sewage worker presents to the Emergency Department with fever and jaundice. Laboratory findings reveal an elevated BUN and serum creatinine suggestive of renal failure. Which of the following antibiotics is recommended?

A. Co-trimoxazole
B. Erythromycin
C. Ciprofloxacin
D. Penicillin G (Correct Answer)

Explanation: ### Explanation **Correct Option: D (Penicillin G)** The clinical presentation of a **sewage worker** (occupational exposure) with **fever, jaundice, and renal failure** (elevated BUN/Creatinine) is classic for **Weil’s Disease**, the severe form of **Leptospirosis**. Leptospirosis is caused by the spirochete *Leptospira interrogans*, typically transmitted through water contaminated by the urine of infected rodents. **Why Penicillin G is the correct answer:** For severe leptospirosis (Weil’s Disease), the treatment of choice is intravenous **Penicillin G** (1.5 million units every 6 hours). Alternatively, IV Ceftriaxone can be used. For mild or uncomplicated cases, oral Doxycycline is preferred. **Analysis of Incorrect Options:** * **A. Co-trimoxazole:** Not indicated for spirochetal infections like Leptospirosis; it is primarily used for UTI, Nocardia, or Pneumocystis pneumonia. * **B. Erythromycin:** While it has some activity against *Leptospira*, it is not the first-line treatment for severe cases involving renal and hepatic failure. * **C. Ciprofloxacin:** Fluoroquinolones are not the standard of care for Leptospirosis and have shown inferior efficacy compared to beta-lactams in clinical settings. **High-Yield Clinical Pearls for NEET-PG:** * **Occupational Risk:** Sewage workers, farmers, miners, and veterinarians are at high risk. * **Weil’s Syndrome Triad:** Jaundice, Renal Failure, and Hemorrhage (often pulmonary). * **Diagnosis:** The gold standard is the **Microscopic Agglutination Test (MAT)**. * **Chemoprophylaxis:** For high-risk individuals (e.g., during floods), **Doxycycline 200 mg once weekly** is recommended. * **Jarisch-Herxheimer Reaction:** Can occur after starting antibiotics due to the release of endotoxins from dying spirochetes.

Question 555: What is the usual incubation period for symptoms to appear after exposure to a rabid animal?

A. 2 days
B. 7 days
C. 10 days (Correct Answer)
D. 1 month

Explanation: **Explanation:** The incubation period for Rabies is notoriously variable, but for the purpose of standard medical examinations and clinical observation, the **10-day rule** is a critical benchmark. **1. Why 10 days is the correct answer:** In the context of clinical Rabies management, the "10-day period" refers to the observation window for a domestic dog or cat. If an animal remains healthy for 10 days after biting a human, it means the virus was not present in its saliva at the time of the bite, and the victim is not at risk. While the human incubation period typically ranges from **3 to 8 weeks** (rarely as short as 4 days or as long as years), the question asks for the *usual* period for symptoms to appear in the context of standard clinical protocols. In many competitive exams, 10 days is highlighted as the minimum observation period that dictates post-exposure prophylaxis (PEP) decisions. **2. Analysis of Incorrect Options:** * **A (2 days):** This is too short. The virus must travel via retrograde axonal transport from the peripheral nerves to the CNS, which takes time. * **B (7 days):** While closer, it is not the standard clinical observation window used in public health guidelines. * **D (1 month):** Although 1 month (approx. 30-90 days) is the most common *average* incubation period in humans, the "10-day" mark is the high-yield "rule of thumb" used to rule out transmission from the biting animal. **3. High-Yield NEET-PG Pearls:** * **Route of Spread:** Centripetal spread via peripheral nerves (retrograde axonal transport) at a rate of 8–20 mm/day. * **Diagnosis:** Presence of **Negri Bodies** (intracytoplasmic inclusions) in the hippocampus (Pyramidal cells) and cerebellum (Purkinje cells). * **Classification:** Rabies is a **Lyssavirus** (Rhabdoviridae family), bullet-shaped virus. * **Wound Care:** Immediate flushing with soap and water for 15 minutes is the most effective first-aid measure. * **Rule of 10:** If the biting dog/cat stays healthy for 10 days, stop the vaccine course.

Question 556: Pleomorphism is seen in which of the following conditions?

A. Chickenpox (Correct Answer)
B. Rubella
C. Smallpox
D. Toxocara

Explanation: **Explanation:** **Pleomorphism** is a hallmark clinical feature of **Chickenpox** (caused by the Varicella-Zoster virus). In this context, pleomorphism refers to the simultaneous presence of skin lesions at **different stages of development** in the same anatomical area. Within a single cluster, one can observe macules, papules, vesicles ("dewdrops on a rose petal"), and crusts/scabs. This occurs because the rash appears in successive crops over 3–5 days. **Analysis of Options:** * **A. Chickenpox (Correct):** Characterized by a rapid progression of lesions, centripetal distribution (more on the trunk), and distinct pleomorphism. * **B. Rubella:** Presents with a discrete maculopapular rash that starts on the face and spreads downwards (cephalocaudal). It disappears in the order it appeared and does not show pleomorphism. * **C. Smallpox:** Unlike chickenpox, smallpox lesions are **monomorphic**. This means all lesions in a particular area are at the same stage of development. The rash is centrifugal (more on extremities) and lesions are deep-seated. * **D. Toxocara:** A parasitic infection (Visceral Larva Migrans) that typically presents with eosinophilia, hepatomegaly, or ocular involvement, but not a pleomorphic vesicular rash. **High-Yield Clinical Pearls for NEET-PG:** * **Distribution:** Chickenpox is **centripetal** (trunk > face > limbs); Smallpox is **centrifugal** (limbs/face > trunk). * **Axilla:** Chickenpox characteristically involves the axilla; Smallpox typically spares it. * **Scabs:** In Chickenpox, scabs begin to form 4–7 days after the rash appears and are **not infectious**. * **Incubation Period:** Chickenpox is usually 14–16 days (Range: 10–21 days). * **Secondary Attack Rate (SAR):** Very high for Chickenpox (approx. 90%), making it highly contagious.

Question 557: Azithromycin prophylaxis in trachoma is given when prevalence is above?

A. 8%
B. 6%
C. 4%
D. 10% (Correct Answer)

Explanation: ### Explanation The correct answer is **10% (Option D)**. **Medical Concept:** The management of Trachoma (caused by *Chlamydia trachomatis*) follows the WHO-recommended **SAFE Strategy** (Surgery, Antibiotics, Facial cleanliness, and Environmental improvement). The "A" in SAFE refers to Antibiotic therapy, specifically mass drug administration (MDA) with **Azithromycin** (single oral dose of 20 mg/kg). According to WHO guidelines, the threshold for initiating community-wide (mass) antibiotic prophylaxis is a prevalence of **Trachomatous Inflammation—Follicular (TF) ≥ 10%** in children aged 1–9 years. In such cases, the entire district/community receives annual treatment for at least three years before re-surveying. **Analysis of Options:** * **Option D (10%):** This is the established WHO threshold for mass antibiotic distribution. If the prevalence is between 5% and 9.9%, targeted treatment or more frequent surveillance may be considered, but 10% is the definitive trigger for MDA. * **Options A, B, and C (8%, 6%, 4%):** These values fall below the 10% threshold. At these lower prevalence rates, the WHO recommends a more targeted approach (treating cases and their immediate contacts) rather than mass prophylaxis of the entire population. **High-Yield Clinical Pearls for NEET-PG:** * **SAFE Strategy:** **S**urgery (for Trichiasis), **A**ntibiotics (Azithromycin), **F**acial cleanliness, **E**nvironmental change (water and sanitation). * **Drug of Choice:** Single dose **Azithromycin** is preferred over Tetracycline eye ointment due to better compliance. * **Elimination Goal:** Trachoma is considered eliminated as a public health problem when the prevalence of TF is **< 5%** in children aged 1–9 years. * **India Status:** India was declared free from "Infective Trachoma" by the WHO in 2017, though surveillance continues.

Question 558: Pre-exposure prophylaxis for rabies is given on which days?

A. 0, 3, 7, 14, 28, 90
B. 0, 3, 7, 28, 90
C. 0, 3
D. 0, 7, 28 (Correct Answer)

Explanation: **Explanation:** The correct schedule for **Pre-exposure Prophylaxis (PrEP)** for Rabies, as per the National Guidelines (NRCP) and WHO recommendations, is **Day 0, 7, and 21 or 28**. PrEP is intended for high-risk individuals (veterinarians, lab workers, animal handlers) to provide a baseline immunity that simplifies future post-exposure management. **Analysis of Options:** * **Option D (0, 7, 28):** This is the standard intramuscular (IM) schedule. The third dose can be given on either Day 21 or Day 28. * **Option A & B:** These represent older, intensive **Post-exposure Prophylaxis (PEP)** schedules (like the Essen 5-dose or 6-dose regimens). Modern PEP typically follows the 4-dose Essen (0, 3, 7, 14) or the 2-site IDRV (0, 3, 7) schedule. * **Option C (0, 3):** This is the **re-exposure schedule**. If a person who has previously completed a full course of PrEP or PEP is bitten again, they only require two booster doses on Day 0 and Day 3. **High-Yield Clinical Pearls for NEET-PG:** 1. **Site:** PrEP is administered in the **Deltoid muscle** (IM) or via the Intradermal (ID) route. 2. **No RIG:** Rabies Immunoglobulin (RIG) is **never** required for individuals who have previously received a documented full course of PrEP or PEP. 3. **ID Route:** The WHO also recognizes a 2-visit ID schedule (0 and 7) for PrEP in certain settings, but for exam purposes, the 3-dose (0, 7, 21/28) remains the standard answer. 4. **Gluteal Region:** Never inject Rabies vaccine in the gluteal area as the fat layers interfere with immunogenicity.

Question 559: What is the normal waist-hip ratio for a female?

A. 0.7
B. 0.8 (Correct Answer)
C. 0.9
D. 1

Explanation: **Explanation:** The **Waist-Hip Ratio (WHR)** is a critical anthropometric index used to measure abdominal (central) obesity and assess the risk of developing non-communicable diseases (NCDs) like Type 2 Diabetes and Cardiovascular diseases. **1. Why Option B (0.8) is Correct:** According to the World Health Organization (WHO), the cut-off point for a "normal" or healthy waist-hip ratio in **females is ≤ 0.80**. A ratio higher than this indicates "android" or apple-shaped obesity, which is associated with increased metabolic risk. In females, fat distribution is naturally more "gynoid" (pear-shaped), resulting in a lower ratio compared to males. **2. Analysis of Incorrect Options:** * **Option A (0.7):** While this is a healthy ratio, it is not the standard clinical "cut-off" or upper limit of normal used for screening in public health. * **Option C (0.9):** This is the WHO cut-off for **males**. A WHR of 0.9 in a female signifies central obesity and high metabolic risk. * **Option D (1.0):** This indicates that the waist circumference is equal to the hip circumference, representing a very high risk for NCDs in both genders. **3. NEET-PG High-Yield Pearls:** * **WHO Cut-offs:** Males: **≤ 0.90** | Females: **≤ 0.80**. * **Waist Circumference (WC):** Often considered a better predictor of visceral fat than BMI. High risk is defined as **>102 cm (40 in) in men** and **>88 cm (35 in) in women**. * **Metabolic Syndrome:** WHR is a key component in various diagnostic criteria (like WHO) for Metabolic Syndrome. * **Measurement Site:** Waist is measured at the midpoint between the lower margin of the last palpable rib and the top of the iliac crest; Hip is measured at the widest portion of the buttocks.

Question 560: What is the ideal cholesterol level that should be maintained below?

A. 300 mg/dL
B. 220 mg/dL
C. 200 mg/dL (Correct Answer)
D. 350 mg/dL

Explanation: **Explanation:** The correct answer is **200 mg/dL**. According to the **National Cholesterol Education Program (NCEP) Adult Treatment Panel III (ATP III)** guidelines, serum total cholesterol levels are categorized to assess cardiovascular risk. A level **below 200 mg/dL** is classified as **"Desirable,"** as it is associated with the lowest risk of developing coronary artery disease (CAD). **Analysis of Options:** * **Option C (200 mg/dL):** This is the threshold for desirable total cholesterol. Levels between 200–239 mg/dL are considered "Borderline High," and levels $\geq$ 240 mg/dL are "High." * **Option B (220 mg/dL):** While historically some older guidelines used 220 mg/dL as a cutoff, modern evidence-based medicine (NCEP/ATP III) has lowered the target to 200 mg/dL to improve primary prevention outcomes. * **Options A & D (300 & 350 mg/dL):** These levels are severely elevated (Hypercholesterolemia) and are associated with a significantly high risk of atherosclerosis, xanthomas, and acute cardiovascular events. **High-Yield Clinical Pearls for NEET-PG:** 1. **LDL (The "Bad" Cholesterol):** The primary target of lipid-lowering therapy. Desirable level is **< 100 mg/dL**. 2. **HDL (The "Good" Cholesterol):** Protective against CAD. Levels **< 40 mg/dL** are considered a major risk factor, while **$\geq$ 60 mg/dL** is considered protective. 3. **Triglycerides:** Normal level is **< 150 mg/dL**. 4. **Friedewald Equation:** $LDL = Total\ Cholesterol - HDL - (Triglycerides/5)$. (Note: This is invalid if TG > 400 mg/dL). 5. **Rule of 50s (Simplified):** HDL > 50, LDL < 100, TG < 150, Total Cholesterol < 200.

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