Non-Communicable Diseases Practice Questions

Q: Which of the following tests is NOT used for the diagnosis of leprosy?

Lepromin test. In leprosy management, it is crucial to distinguish between **diagnosis** and **prognosis**. **Why Option A (Lepromin Test) is the correct answer:** The Lepromin test is **not** a diagnostic test. It cannot confirm if a patient has leprosy because it is often negative in the most severe form (lepromatous leprosy) and can be positive in healthy individuals due to cross-reactivity with BCG or environmental mycobacteria. Instead, it is used for: 1. **Classification:** To categorize leprosy into Tuberculoid (Positive) or Lepromatous (Negative). 2. **Prognosis:** To assess the patient’s cell-mediated immunity (CMI) against *M. leprae*. 3. **Assessment of Resistance:** To check the immune status of an individual. **Why the other options are incorrect (Diagnostic Methods):** * **Slit Skin Smear (B):** The gold standard for identifying Acid-Fast Bacilli (AFB) using Ziehl-Neelsen staining. It is essential for calculating the Bacteriological Index (BI). * **Fine Needle Aspiration Cytology (C):** A reliable tool for sampling cells from enlarged nerves or skin nodules to identify granulomas and bacilli. * **Skin Biopsy (D):** The definitive method for histopathological confirmation, showing characteristic nerve involvement and granuloma patterns. **High-Yield Clinical Pearls for NEET-PG:** * **Cardinal Signs:** Diagnosis is primarily clinical based on: (1) Hypopigmented patches with sensory loss, (2) Thickened peripheral nerves, and (3) Positive skin smears. * **Fernandez Reaction:** Early reading of Lepromin test (at 48 hours); indicates delayed hypersensitivity. * **Mitsuda Reaction:** Late reading (at 21 days); indicates cell-mediated immunity. * **Ridley-Jopling Scale:** The standard 5-group classification system based on clinical, immunological, and histopathological features.

Q: Which act is related to cigarette smoking?

Cigarette smoking. **Explanation:** The question refers to the **COTPA (Cigarettes and Other Tobacco Products Act), 2003**. This is the primary legislation in India governing the trade, commerce, production, supply, and distribution of tobacco products. **1. Why the Correct Answer is Right:** The act specifically targets the regulation of **Cigarette smoking** and other tobacco products. Key provisions under COTPA include: * **Section 4:** Prohibition of smoking in public places. * **Section 5:** Prohibition of direct and indirect advertisement of tobacco products. * **Section 6:** Prohibition of sale to minors (under 18) and within 100 yards of educational institutions. * **Section 7:** Mandatory pictorial health warnings on all tobacco packs. **2. Why Incorrect Options are Wrong:** * **Child Abuse:** Governed primarily by the **POCSO Act** (Protection of Children from Sexual Offences Act, 2012) and the Juvenile Justice Act. * **Consumer Related:** Governed by the **Consumer Protection Act, 2019**, which protects consumers against unfair trade practices. * **Cocaine:** Regulated under the **NDPS Act** (Narcotic Drugs and Psychotropic Substances Act, 1985), which deals with the control and regulation of narcotic drugs. **High-Yield Facts for NEET-PG:** * **MPOWER Strategy:** Launched by WHO to monitor tobacco use and prevention policies. * **World No Tobacco Day:** Observed on **May 31st**. * **NTCP:** The National Tobacco Control Programme was launched in 2007-08 to facilitate the implementation of COTPA. * **GATS (Global Adult Tobacco Survey):** The key survey used to monitor tobacco prevalence in India.

Q: What is true about the Mantoux test?

The test is usually read after 48-72 hours.. **Explanation:** The Mantoux test (Tuberculin Skin Test) is a classic example of a **Type IV (Delayed-type) Hypersensitivity reaction**. When Purified Protein Derivative (PPD) is injected intradermally, it triggers a T-cell mediated response. This reaction takes time to develop, peaking between **48 to 72 hours**, which is why the induration must be measured during this specific window. **Analysis of Options:** * **Option A is incorrect:** A reaction is measured in **millimeters (mm)**, not centimeters. Furthermore, a reaction <5 mm is generally considered negative. * **Option B is incorrect:** Once a person is sensitized to *M. tuberculosis*, the Mantoux test usually remains positive for life, even after successful treatment. It cannot be used to monitor treatment efficacy. * **Option C is incorrect:** A positive reaction in children under 5 years (especially <2 years) is of **greater clinical significance**. It indicates recent infection and a high risk of progression to severe forms like tubercular meningitis or miliary TB. * **Option D is correct:** This is the standard protocol for reading the induration (not erythema). **High-Yield NEET-PG Pearls:** * **Dose:** 0.1 ml of PPD containing 5 TU (Tuberculin Units) is injected intradermally on the volar aspect of the forearm. * **False Negatives (Anergy):** Can occur in HIV/AIDS (low CD4 count), miliary TB, malnutrition, or recent viral infections (e.g., Measles). * **False Positives:** Can occur due to prior BCG vaccination or infection with Non-Tuberculous Mycobacteria (NTM). * **Booster Phenomenon:** A second test done shortly after an initial negative test may be positive due to "re-awakening" of the immune memory.

Q: Which of the following is the serogroup of Neisseria meningitidis that is primarily responsible for epidemic meningitis?

Serogroup W135. **Explanation:** The correct answer is **Serogroup W135**. While *Neisseria meningitidis* has several serogroups based on capsular polysaccharides, **Serogroup A** has historically been the most common cause of large-scale epidemics, particularly in the "Meningitis Belt" of Sub-Saharan Africa. However, in recent decades, **Serogroup W135** has emerged as a significant cause of major international outbreaks and epidemics, notably associated with Hajj pilgrimage travelers and subsequent global spread. **Analysis of Options:** * **Serogroup W135 (Correct):** It gained prominence after the 2000/2001 Hajj outbreaks. It is now recognized as a primary epidemic strain alongside Serogroup A and X. * **Serogroup B:** This is a major cause of **endemic** disease and sporadic cases in developed countries (Europe and North America). It is less likely to cause explosive epidemics because its polysaccharide capsule is poorly immunogenic. * **Serogroup C:** Often causes localized outbreaks in schools or military camps but is less frequently associated with large-scale continental epidemics compared to A or W135. * **Serogroup Y:** Primarily associated with sporadic cases of meningococcal pneumonia and is rarely the driver of major epidemics. **High-Yield Clinical Pearls for NEET-PG:** * **The Meningitis Belt:** Extends across Sub-Saharan Africa from Senegal to Ethiopia. * **Vaccination:** The Quadrivalent vaccine (**ACYW135**) is mandatory for Hajj pilgrims. * **Drug of Choice:** **Ceftriaxone** is the treatment of choice; **Rifampicin** (or Ciprofloxacin/Ceftriaxone) is used for chemoprophylaxis of close contacts. * **Most common serogroup in India:** Historically Serogroup A, though patterns are shifting.

Q: In a population, changing harmful lifestyles through education to prevent Coronary Artery Disease is referred to as which type of prevention?

Primary prevention. **Explanation:** The core of this question lies in identifying the timing of the intervention. **Primary prevention** aims to prevent the onset of a disease by controlling its causes and risk factors. In the context of Coronary Artery Disease (CAD), changing harmful lifestyles (such as smoking cessation, physical activity, and healthy diet) through education is a classic example of **Specific Protection** and **Health Promotion**, both of which are modes of intervention under Primary Prevention. It is applied in the "Pre-pathogenesis" phase, where the goal is to reduce the incidence of disease. **Analysis of Incorrect Options:** * **A. High-risk strategy:** While this is a *sub-type* of primary prevention, it focuses only on individuals at the highest risk (e.g., those with existing hypertension). The question describes a general educational approach to change lifestyles, which aligns more broadly with the "Population Strategy" of Primary Prevention. * **C. Secondary prevention:** This involves early diagnosis and prompt treatment (e.g., screening for asymptomatic CAD or using Aspirin after a diagnosis) to arrest the disease process and prevent complications. * **D. Tertiary prevention:** This occurs in the late pathogenesis phase, focusing on disability limitation and rehabilitation (e.g., cardiac rehabilitation after a myocardial infarction). **NEET-PG High-Yield Pearls:** * **Primordial Prevention:** Prevention of the *emergence* of risk factors (e.g., discouraging children from starting smoking). If the risk factor is already present (as implied by "harmful lifestyles"), the intervention is Primary Prevention. * **Primary Prevention** = Reducing **Incidence**. * **Secondary Prevention** = Reducing **Prevalence** (by shortening disease duration through early treatment). * **Modes of Intervention for Primary Prevention:** Health Promotion and Specific Protection (e.g., Immunization).

Q: The last case of smallpox was reported in the world in which year?

1977. **Explanation:** Smallpox (caused by the *Variola* virus) holds a significant place in public health history as the first disease to be eradicated globally. **Why Option A is Correct:** The last **naturally occurring** case of smallpox (*Variola minor*) was reported in **Ali Maow Maalin** in Merca, **Somalia**, on **October 26, 1977**. This date marks the definitive end of natural transmission of the virus in the human population. **Analysis of Incorrect Options:** * **Option B (1978):** This year is significant because the **last fatal case** of smallpox occurred due to a **laboratory accident** in Birmingham, UK (Janet Parker). It was not a naturally occurring case. * **Option C (1979):** On December 9, 1979, the Global Commission for the Certification of Smallpox Eradication signed the document certifying that smallpox had been eradicated worldwide. * **Option D (1982):** This date is irrelevant to smallpox milestones. The official declaration of eradication by the World Health Assembly (WHA) occurred earlier, in **May 1980**. **High-Yield Clinical Pearls for NEET-PG:** * **Last case in India:** Reported on May 24, 1975 (Bhanumati Bhattacharya in Bihar). * **India declared Smallpox free:** April 1977. * **Global Eradication Declaration:** May 8, 1980 (33rd WHA). * **Vaccine:** Smallpox vaccine was the first vaccine (Edward Jenner, 1796) and utilized the **Bifurcated needle**. * **Eradication Strategy:** Shifted from mass vaccination to **"Surveillance and Containment."**

Q: Waist-hip ratio below what value is associated with low cardiovascular morbidity in females?

0.8. **Explanation:** The **Waist-Hip Ratio (WHR)** is a critical anthropometric index used to measure abdominal (android) obesity, which is a significant risk factor for non-communicable diseases (NCDs) like Type 2 Diabetes and Cardiovascular Disease (CVD). **1. Why 0.8 is the Correct Answer:** According to the World Health Organization (WHO), a waist-hip ratio of **≤ 0.80 in females** and **≤ 0.90 in males** is considered the cutoff for low cardiovascular morbidity. Values above these thresholds indicate "central obesity," where fat is deposited around the intra-abdominal organs. This visceral fat is metabolically active and releases pro-inflammatory cytokines, leading to insulin resistance and atherosclerosis. **2. Analysis of Incorrect Options:** * **0.9 (Option A):** This is the cutoff value for **males**. In females, 0.9 already indicates a high risk for metabolic complications. * **1.0 (Option B):** A ratio of 1.0 or higher signifies a "bell-shaped" or "apple-shaped" body, representing a very high risk for myocardial infarction and stroke. * **0.5 (Option D):** This value is more relevant to the **Waist-to-Height Ratio (WHtR)**, where the general recommendation is to "keep your waist to less than half your height." **3. High-Yield Clinical Pearls for NEET-PG:** * **Apple vs. Pear:** Android (Apple) obesity carries a much higher CV risk than Gynoid (Pear) obesity. * **Waist Circumference Cutoffs (Asian Indians):** Due to higher visceral fat at lower BMIs, the cutoffs are stricter: **>90 cm for men** and **>80 cm for women**. * **Metabolic Syndrome:** WHR is a key component in various diagnostic criteria for Metabolic Syndrome (e.g., WHO criteria). * **Gold Standard:** While WHR is excellent for field surveys, **CT/MRI** remains the gold standard for measuring visceral fat.

Question 1

Which of the following is NOT true regarding malaria?

Accepted Answer

Infant parasite rate is a poor indicator of malaria occurrence in a community.

Answer

Aberration (ABER) is used as an operational approach.

Answer

Spleen rate is an important indicator of the endemisity of malaria.

Answer

Malaria is usually caused by Plasmodium vivax.

Question 2

Which of the following tests is NOT used for the diagnosis of leprosy?

Accepted Answer

Lepromin test

Answer

Slit skin smear

Answer

Fine needle aspiration cytology

Answer

Skin biopsy

Question 3

What is the maximum time after exposure within which measles vaccine can be given?

Accepted Answer

6 months

Answer

3 months

Answer

5 months

Answer

7 months

Question 4

Which act is related to cigarette smoking?

Accepted Answer

Cigarette smoking

Answer

Child abuse

Answer

Consumer related

Answer

Cocaine

Question 5

What is true about the Mantoux test?

Accepted Answer

The test is usually read after 48-72 hours.

Answer

A reaction less than 5 cm is always positive.

Answer

The test is usually negative after treatment.

Answer

A positive reaction in children less than 2 years old is less important than in adults.

Question 6

Which of the following statements is true about the epidemiology of leprosy?

Accepted Answer

Insects can transmit leprosy.

Answer

A high prevalence of cases in childhood indicates that the disease is under control.

Answer

Lepra bacilli cannot survive outside the human body.

Answer

The bacterial load is high in the tuberculoid variety of leprosy.

Question 7

Which of the following is the serogroup of Neisseria meningitidis that is primarily responsible for epidemic meningitis?

Accepted Answer

Serogroup W135

Answer

Serogroup B

Answer

Serogroup C

Answer

Serogroup Y

Question 8

In a population, changing harmful lifestyles through education to prevent Coronary Artery Disease is referred to as which type of prevention?

Accepted Answer

Primary prevention

Answer

High risk strategy

Answer

Secondary prevention

Answer

Tertiary prevention

Question 9

The last case of smallpox was reported in the world in which year?

Accepted Answer

1977

Answer

1978

Answer

1979

Answer

1982

Question 10

Waist-hip ratio below what value is associated with low cardiovascular morbidity in females?

Accepted Answer

0.8

Answer

0.9

Answer

1

Answer

0.5

Non-Communicable Diseases — MCQs

Non-Communicable Diseases — MCQs

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