Non-Communicable Diseases Practice Questions

Q: Which geographical region is predominantly associated with HIV C subtype?

India. **Explanation:** The distribution of Human Immunodeficiency Virus (HIV) is characterized by significant genetic diversity, with **HIV-1 Group M** being responsible for the global pandemic. This group is further divided into several subtypes (clades). **1. Why India is Correct:** **Subtype C** is the most prevalent subtype of HIV-1 worldwide, accounting for nearly half of all global infections. It is the predominant strain in **India**, South Africa, and Ethiopia. In India, Subtype C is responsible for over 90% of HIV infections, making it a high-yield fact for community medicine and microbiology. **2. Analysis of Incorrect Options:** * **Europe and America (Options B & C):** These regions are predominantly associated with **Subtype B**. Most early research and clinical trials were conducted on this subtype, although other subtypes are now increasing due to migration. * **Thailand (Option D):** Southeast Asia, particularly Thailand, is uniquely associated with the **CRF01_AE** (a circulating recombinant form) and Subtype B. **High-Yield Clinical Pearls for NEET-PG:** * **Most common HIV type globally:** HIV-1. * **Most common HIV-1 Subtype globally and in India:** Subtype C. * **HIV-2 prevalence:** Primarily restricted to West Africa; in India, it is most commonly seen in Maharashtra and parts of Southern India. * **Transmission:** While Subtype B is often associated with MSM (men who have sex with men) in Western countries, Subtype C in India is primarily spread through **heterosexual transmission**. * **Diagnosis:** The "Window Period" for modern 4th generation ELISA (p24 antigen + antibody) is typically 14–21 days.

Q: World Diabetes Day is celebrated on which date?

November 14th. **Explanation:** **Correct Answer: C. November 14th** World Diabetes Day (WDD) is observed annually on **November 14th**. This date was chosen to mark the birthday of **Sir Frederick Banting**, who co-discovered insulin along with Charles Best in 1922. The campaign was established in 1991 by the International Diabetes Federation (IDF) and the WHO in response to the growing health threat posed by diabetes. In 2006, it became an official United Nations Day. The symbol for World Diabetes Day is the **Blue Circle**, representing the unity of the global diabetes community. **Analysis of Incorrect Options:** * **A. May 8th:** This is **World Red Cross Day** and World Thalassaemia Day. * **B. March 8th:** This is **International Women’s Day**. (Note: World Kidney Day is also observed in March, on the second Thursday). * **D. December 1st:** This is **World AIDS Day**, a frequently asked date in NEET-PG regarding communicable diseases. **High-Yield Clinical Pearls for NEET-PG:** * **Screening:** According to NPCDCS guidelines, opportunistic screening for Diabetes Mellitus starts at **30 years** of age. * **Diagnostic Criteria:** Fasting Plasma Glucose $\geq$ 126 mg/dL or HbA1c $\geq$ 6.5%. * **Rule of Halves:** Diabetes follows the "Rule of Halves"—half the people are diagnosed, half of those receive care, and half of those achieve treatment targets. * **Public Health Goal:** The primary prevention of Type 2 Diabetes focuses on lifestyle modifications (primordial prevention).

Q: Sputum from a patient is disinfected immediately following expectoration. This process is known as:

Concurrent disinfection. **Explanation:** The correct answer is **Concurrent Disinfection**. This refers to the immediate disinfection and disposal of infectious materials (such as sputum, urine, feces, or contaminated linen) throughout the course of an illness. The primary goal is to minimize the spread of the infectious agent from the patient to others by neutralizing the pathogen as soon as it leaves the body. **Analysis of Options:** * **Concurrent Disinfection (A):** This is the standard practice for active cases. By disinfecting sputum immediately after expectoration, the chain of transmission is broken in real-time. * **Pre-concurrent Disinfection (B):** This is not a standard epidemiological term used in infection control. * **Recurrent Disinfection (C):** This is a distractor term. While disinfection may happen repeatedly, the formal medical term for ongoing disinfection during illness is "concurrent." * **Terminal Disinfection (D):** This refers to the final disinfection of the patient’s room and personal belongings *after* the patient has recovered, been discharged, or died. It aims to ensure the environment is safe for the next occupant. **High-Yield Clinical Pearls for NEET-PG:** * **Prophylactic Disinfection:** Refers to measures like chlorination of water or pasteurization of milk to prevent potential disease. * **Levels of Disinfection:** Remember that **Sterilization** kills all microbial life including spores, whereas **Disinfection** reduces the number of pathogens but may not eliminate bacterial spores. * **Common Disinfectants:** For sputum in TB cases, 5% Cresol or 1% Sodium Hypochlorite are frequently used. * **Key Distinction:** Concurrent = *During* the illness; Terminal = *After* the illness.

Q: Metabolic Syndrome has the following features except?

High HDL levels. **Explanation:** Metabolic Syndrome (also known as Syndrome X or Insulin Resistance Syndrome) is a cluster of metabolic abnormalities that significantly increase the risk of cardiovascular disease and Type 2 Diabetes Mellitus. **Why "High HDL levels" is the correct answer:** The hallmark of Metabolic Syndrome is **Dyslipidemia**, specifically characterized by **Low HDL (High-Density Lipoprotein) levels** (the "good" cholesterol). According to the NCEP ATP III criteria, HDL levels below 40 mg/dL in men or 50 mg/dL in women are considered a diagnostic component. Therefore, "High HDL" is protective and is not a feature of the syndrome. **Analysis of Incorrect Options:** * **A. High Triglycerides:** Hypertriglyceridemia (≥150 mg/dL) is a core component of the metabolic profile in these patients. * **B. High Blood Pressure:** Hypertension (≥130/85 mmHg) or being on antihypertensive medication is a primary diagnostic criterion. * **C. High Blood Sugar:** Impaired fasting glucose (≥100 mg/dL) or a diagnosis of Type 2 Diabetes is a key feature reflecting underlying insulin resistance. **High-Yield Clinical Pearls for NEET-PG:** * **NCEP ATP III Criteria:** Diagnosis requires at least **3 out of 5** of the following: 1. **Abdominal Obesity:** Waist circumference >102 cm (M) or >88 cm (F). *Note: For South Asians (Modified WHO criteria), it is >90 cm (M) and >80 cm (F).* 2. **Triglycerides:** ≥150 mg/dL. 3. **HDL Cholesterol:** <40 mg/dL (M) or <50 mg/dL (F). 4. **Blood Pressure:** ≥130/85 mmHg. 5. **Fasting Glucose:** ≥100 mg/dL. * The fundamental underlying pathophysiology is **Insulin Resistance**. * Metabolic Syndrome is a major risk factor for **Non-Alcoholic Fatty Liver Disease (NAFLD)** and **PCOS**.

Q: Immunoprophylaxis of leprosy includes?

BCG. **Explanation:** The correct answer is **BCG (Bacillus Calmette–Guérin)**. **1. Why BCG is correct:** Although primarily used for Tuberculosis, the BCG vaccine provides significant cross-protection against *Mycobacterium leprae* due to shared antigenic determinants between *M. tuberculosis* and *M. leprae*. Meta-analyses suggest that a single dose of BCG offers approximately 50% protection against leprosy, and this protection increases significantly with a second (booster) dose. Under the National Leprosy Eradication Programme (NLEP), BCG is recognized for its immunoprophylactic role. **2. Analysis of Incorrect Options:** * **MMR:** This is a live attenuated vaccine for Measles, Mumps, and Rubella (viral infections) and has no efficacy against mycobacterial diseases. * **ICRC Bacillus:** While the ICRC vaccine (developed from a cultivable strain of *M. leprae* at the Indian Cancer Research Centre) is indeed an anti-leprosy vaccine, it is considered an **experimental/candidate vaccine** and is not used for routine immunoprophylaxis in the same capacity as BCG. * **Anthrax vaccine:** This is used for *Bacillus anthracis* and has no cross-reactivity with leprosy. **3. High-Yield Clinical Pearls for NEET-PG:** * **MIP Vaccine:** The **Mycobacterium Indicus Pranii (MIP)** vaccine is the world’s first exclusive vaccine for leprosy, developed in India. It is used as an adjunct to MDT and for immunoprophylaxis in close contacts. * **Chemoprophylaxis:** The drug of choice for post-exposure prophylaxis (PEP) in leprosy is a **Single Dose of Rifampicin (SDR)**. * **Combined Approach:** The most effective prevention for household contacts is currently a combination of BCG vaccination and SDR.

Question 1

A contact carrier in cholera has which of the following characteristics?

Accepted Answer

Duration of carrier state is less than 10 days

Answer

Gallbladder is infected

Answer

Stools are not positive for cholera vibrio

Answer

Does not play any role in the spread of infection

Question 2

Which geographical region is predominantly associated with HIV C subtype?

Accepted Answer

India

Answer

Europe

Answer

America

Answer

Thailand

Question 3

What is the presumptive treatment of malaria in a chloroquine-resistant area?

Accepted Answer

Sulphalene + pyrimethamine

Answer

Chloroquine + pyrimethamine

Answer

Chloroquine + primaquine

Answer

Sulphalene 1000 mg

Question 4

World Diabetes Day is celebrated on which date?

Accepted Answer

November 14th

Answer

May 8th

Answer

March 8th

Answer

December 1st

Question 5

What is the best preventive measure against tetanus neonatorum?

Accepted Answer

Active immunization of the mother

Answer

Passive immunization of the child

Answer

Active immunization of the child

Answer

Passive immunization of the mother

Question 6

What is the denominator used in calculating the General Fertility Rate?

Accepted Answer

Mid-year population of women in the reproductive age group of 15-45 years

Answer

Live births

Answer

Mid-year population

Answer

Married women in the age group 15-45 years

Question 7

Sputum from a patient is disinfected immediately following expectoration. This process is known as:

Accepted Answer

Concurrent disinfection

Answer

Pre-concurrent disinfection

Answer

Recurrent disinfection

Answer

Terminal disinfection

Question 8

Metabolic Syndrome has the following features except?

Accepted Answer

High HDL levels

Answer

High triglycerides

Answer

High blood pressure

Answer

High blood sugar

Question 9

Immunoprophylaxis of leprosy includes?

Accepted Answer

BCG

Answer

MMR

Answer

ICRC bacillus

Answer

Anthrax vaccine

Question 10

Which of the following statements is true for the Mantoux test?

Accepted Answer

A positive test does not indicate that the person is suffering from the disease.

Answer

The test is read before 48 hours.

Answer

6-9 mm induration shows maximum chances of developing TB.

Answer

New cases are more likely to occur in tuberculin-negative persons than in those who are already tuberculin reactors.

Non-Communicable Diseases — MCQs

Non-Communicable Diseases — MCQs

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