Non-Communicable Diseases Practice Questions

Q: Which of the following statements is NOT true about Kala-Azar?

Man has the flagellar stage of the organism. ### Explanation **Correct Answer: D. Man has the flagellar stage of the organism** **Why Option D is NOT true:** The causative agent of Kala-azar, *Leishmania donovani*, exists in two distinct morphological forms. The **flagellar stage (Promastigote)** is found only in the vector (Sandfly) and in artificial cultures. In the human host (Man), the parasite exists exclusively in the **aflagellar stage (Amastigote)**, also known as Leishman-Donovan (LD) bodies, residing within the reticuloendothelial system (macrophages). **Analysis of Other Options:** * **A. Sandfly is the vector:** This is true. The disease is transmitted by the bite of the female *Phlebotomus argentipes*. * **B. Man is the only reservoir in India:** This is true. Unlike in other parts of the world (where dogs or rodents may be reservoirs), Indian Kala-azar is **anthroponotic**, meaning humans are the sole reservoir of infection. * **C. Aldehyde test is diagnostic:** While technically a non-specific screening tool, in the context of classic medical exams, the Napier’s Aldehyde test is associated with Kala-azar. It depends on the increase in serum gamma globulins. Note: It only becomes positive after 3 months of illness. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Demonstration of LD bodies in **splenic aspirate** (highest sensitivity) or bone marrow aspirate. * **Drug of Choice:** **Liposomal Amphotericin B** (single dose of 10mg/kg is the current WHO recommendation for India). * **PKDL (Post Kala-azar Dermal Leishmaniasis):** A non-ulcerative condition appearing years after "cure"; it serves as a major parasite reservoir in the community. * **Elimination Goal:** To reduce the annual incidence to less than **1 case per 10,000 population** at the block level.

Q: What is the primary change in the Revised National Tuberculosis Control Programme (RNTCP)?

Therapy not based on DOTS. **Explanation:** The correct answer is **C. Therapy not based on DOTS**. This question highlights a significant paradigm shift in India’s tuberculosis management strategy. In 2020, the RNTCP was renamed the **National Tuberculosis Elimination Program (NTEP)**. The primary change is the transition from the traditional "DOTS" (Directly Observed Treatment, Short-course) strategy to a more patient-centric approach. Under the revised guidelines, the program has moved away from the mandatory "Direct Observation" (where a provider must watch the patient swallow pills) because it was often perceived as stigmatizing and burdensome. Instead, the NTEP focuses on **Treatment Support**, utilizing digital tools (like Nikshay) and family-led supervision to ensure adherence, effectively making the therapy "not strictly based on DOTS" in its classical sense. **Analysis of Incorrect Options:** * **Option A:** DOTS was the cornerstone of the *old* RNTCP. The revision focuses on decentralized, patient-friendly support rather than rigid direct observation. * **Option B:** While sputum microscopy was the primary tool previously, the revised program prioritizes **Molecular Diagnostics (CBNAAT/NAAT)** as the initial diagnostic test to detect drug resistance early. * **Option D:** While early diagnosis and treatment remain goals, they are general principles of any public health program and do not represent the specific structural change in the revised strategy. **High-Yield Clinical Pearls for NEET-PG:** * **Goal:** India aims to eliminate TB by **2025** (5 years ahead of the Global SDG goal of 2030). * **Daily Regimen:** NTEP uses a daily fixed-dose combination (FDC) instead of the older intermittent (thrice-weekly) regimen. * **Nikshay Poshan Yojana:** Provides ₹500/month nutritional support to all TB patients. * **Universal Drug Susceptibility Testing (UDST):** Every diagnosed TB patient is tested for Rifampicin resistance at the outset.

Q: The Montenegro test is performed to diagnose which of the following conditions?

Kala-azar. **Explanation:** The **Montenegro test** (also known as the Leishmanin skin test) is a delayed-type hypersensitivity (Type IV) reaction used to detect prior exposure to *Leishmania* parasites, the causative agents of **Kala-azar** (Visceral Leishmaniasis). **Why Kala-azar is correct:** The test involves the intradermal injection of a suspension of killed *Leishmania* promastigotes. A positive result (induration ≥5 mm after 48–72 hours) indicates a cell-mediated immune response. It is important to note that the test is typically **negative** during active visceral leishmaniasis (due to suppressed cell-mediated immunity) but becomes **positive** after successful treatment or in cases of Cutaneous Leishmaniasis and Post-Kala-azar Dermal Leishmaniasis (PKDL). **Why other options are incorrect:** * **Hydatid disease:** Diagnosed primarily via imaging (USG/CT) and the **Casoni’s test** (though now largely replaced by serology like ELISA). * **Taeniasis:** Diagnosed by stool microscopy for eggs or proglottids; no specific skin test is used for routine diagnosis. * **Filariasis:** Diagnosed by demonstrating microfilariae in peripheral blood (night samples) or using the ICT (Immunochromatographic test) for circulating filarial antigen. **High-Yield Clinical Pearls for NEET-PG:** * **Vector:** Sandfly (*Phlebotomus argentipes*). * **Drug of Choice:** Liposomal Amphotericin B (current standard). * **RK-39 Immunochromatographic test:** The rapid diagnostic test of choice for active Kala-azar in field settings. * **Aldehyde Test (Napier’s test):** Based on hypergammaglobulinemia; it is non-specific but used for screening.

Q: In which year was the Pulse Polio immunization program introduced?

1995. **Explanation:** The **Pulse Polio Immunization (PPI)** program was launched in India in **1995** (specifically on December 9, 1995) following the World Health Assembly resolution of 1988. The program aimed at 100% coverage under the Global Polio Eradication Initiative. **Why 1995 is correct:** The strategy involved administering two doses of Oral Polio Vaccine (OPV) to all children under five years of age, regardless of their previous immunization status, on "National Immunization Days" (NIDs). This "pulse" approach was designed to flood the community with the vaccine virus to displace the wild poliovirus. **Analysis of Incorrect Options:** * **1999 & 2000:** These years represent the intensification phase of the program. In 1999, "House-to-House" vaccination was introduced to reach missed children, but the program itself was already well-established. * **2001:** By this time, India had significantly reduced polio cases, but this date does not correlate with any major milestone in the program's inception. **High-Yield Clinical Pearls for NEET-PG:** * **Last Case of Polio in India:** Reported on January 13, 2011, in Howrah, West Bengal. * **WHO Certification:** India was declared "Polio Free" on **March 27, 2014**. * **Vaccine Shift:** India switched from Trivalent OPV (tOPV) to **Bivalent OPV (bOPV)** in April 2016. * **Current Strategy:** Inclusion of **Inactivated Poliovirus Vaccine (IPV)** in the routine immunization schedule to prevent Vaccine-Associated Paralytic Polio (VAPP).

Q: A disease that is transmitted from vertebrate animals to humans under natural conditions is called:

Zoonosis. ### Explanation **Correct Option: A. Zoonosis** According to the World Health Organization (WHO), **Zoonoses** are defined as diseases and infections which are naturally transmitted between vertebrate animals and man. The transmission can be direct (e.g., Rabies via bite) or indirect (e.g., Plague via flea vector). This is a fundamental concept in epidemiology used to classify diseases based on their natural reservoir. **Analysis of Incorrect Options:** * **B. Exotic:** This refers to a disease that is not native to a specific geographic area but is imported from another country (e.g., Yellow Fever is exotic to India). * **C. Epizoonotic:** This is a distractor term. The correct epidemiological term is **Epizootic**, which refers to an outbreak (epidemic) of disease in an animal population (e.g., Anthrax or Avian Flu in birds). * **D. Amphixenotic:** This is a specific sub-type of zoonosis where the infection is maintained in both man and lower vertebrate animals and can be transmitted in either direction (e.g., *Trypanosoma cruzi*). **High-Yield NEET-PG Pearls:** * **Anthropozoonoses:** Infections transmitted from animals to man (e.g., Rabies, Leptospirosis). * **Zooanthroponoses:** Infections transmitted from man to animals (e.g., Human Tuberculosis to cattle). * **Cyclozoonoses:** Require more than one vertebrate host species to complete the life cycle (e.g., Echinococcosis, Taeniasis). * **Metazoonoses:** Transmitted to humans via an invertebrate vector (e.g., Plague, Arboviruses). * **Saprozoonoses:** Require a non-animal site like soil or decaying matter for the life cycle (e.g., Tetanus, Histoplasmosis).

Q: For controlling an outbreak of cholera, all of the following measures are recommended except?

Mass chemoprophylaxis. ### Explanation The control of a cholera outbreak focuses on breaking the chain of transmission through environmental sanitation and rapid clinical intervention. **Why Mass Chemoprophylaxis is NOT recommended (Option A):** Mass chemoprophylaxis (administering antibiotics to an entire community) is contraindicated in cholera control for several reasons: 1. **Drug Resistance:** It rapidly leads to the emergence of antibiotic-resistant strains of *Vibrio cholerae*. 2. **False Sense of Security:** It diverts resources from essential measures like water sanitation and creates a false sense of safety among the public. 3. **Short Duration of Effect:** Antibiotics only provide very brief protection, which is ineffective for a prolonged outbreak. *Note: Chemoprophylaxis is only recommended for **household contacts** (selective chemoprophylaxis).* **Analysis of Incorrect Options:** * **Option B (Excreta Disposal):** Cholera is a feco-oral disease. Safe disposal of stools and vomitus is critical to prevent environmental contamination. * **Option C (Chlorination):** This is the most important single measure. Ensuring a free residual chlorine level of **0.5 mg/L** in drinking water effectively kills the vibrios. * **Option D (Early Detection):** Rapid identification of cases and immediate rehydration (ORS/IV fluids) is the mainstay of reducing the Case Fatality Rate (CFR) to less than 1%. **High-Yield NEET-PG Pearls:** * **Drug of Choice (DOC):** For treatment, **Doxycycline** (single dose) is the DOC for adults; **Azithromycin** is preferred for children and pregnant women. * **Selective Chemoprophylaxis:** The DOC for household contacts is also **Doxycycline**. * **Best Indicator of Water Quality:** Orthotolidine Arsenite (OTA) test is used to measure free and combined chlorine. * **Vaccination:** Not recommended for managing an *ongoing* outbreak; it is a pre-emptive tool for endemic areas or high-risk populations.

Q: The Human Poverty Index includes all of the following EXCEPT:

Infant mortality. The **Human Poverty Index (HPI)** was introduced by the UNDP in 1997 to measure deprivation in the same three basic dimensions as the Human Development Index (HDI). **Why Infant Mortality is the Correct Answer:** Infant Mortality Rate (IMR) is **not** a direct component of the Human Poverty Index. While IMR is a sensitive indicator of a community's health status and socioeconomic development, the HPI specifically uses **Longevity** (measured by the probability of not surviving to age 40) rather than infant-specific mortality. **Analysis of Incorrect Options:** The HPI is calculated based on three dimensions of deprivation: * **Longevity (Option B):** Represented by the percentage of people expected to die before age 40. * **Knowledge (Option C):** Represented by the **Adult Literacy Rate**. It measures exclusion from the world of reading and communication. * **Standard of Living (Option D):** This is a composite of three variables: percentage of people with access to **health services**, percentage with access to **safe water**, and the percentage of **malnourished children** (underweight for age). **High-Yield Clinical Pearls for NEET-PG:** * **HPI-1 vs. HPI-2:** HPI-1 measures poverty in developing countries, while HPI-2 is used for developed (OECD) countries and includes a fourth dimension: **Social Exclusion** (measured by long-term unemployment). * **HDI vs. HPI:** HDI measures average achievement, while HPI measures **deprivation** in those same achievements. * **PQLI (Physical Quality of Life Index):** Do not confuse HPI with PQLI. PQLI components are **Infant Mortality**, **Life Expectancy at Age 1**, and **Literacy**. * **MPI:** The HPI was replaced by the **Multidimensional Poverty Index (MPI)** in 2010, which uses 10 indicators across Health, Education, and Standard of Living.

Question 1

Which of the following statements is NOT true about Kala-Azar?

Accepted Answer

Man has the flagellar stage of the organism

Answer

Sandfly is the vector

Answer

Man is the only reservoir in India

Answer

Aldehyde test is diagnostic

Question 2

What is the recommended duration for the treatment of Multi-drug resistant Tuberculosis (MDR-TB)?

Accepted Answer

2-3 years

Answer

8-12 months

Answer

12-16 months

Answer

16-24 months

Question 3

What is the primary change in the Revised National Tuberculosis Control Programme (RNTCP)?

Accepted Answer

Therapy not based on DOTS

Answer

Therapy based on Directly Observed Treatment, Short-course (DOTS)

Answer

Diagnosis via sputum microscopy

Answer

Early diagnosis and treatment

Question 4

The Montenegro test is performed to diagnose which of the following conditions?

Accepted Answer

Kala-azar

Answer

Hydatid disease

Answer

Taeniasis

Answer

Filariasis

Question 5

In which year was the Pulse Polio immunization program introduced?

Accepted Answer

1995

Answer

2000

Answer

1999

Answer

2001

Question 6

Which of the following is NOT helpful for the elimination of Filariasis?

Accepted Answer

Larvae are deposited on the skin surface where they cannot survive.

Answer

Microfilariae do not multiply in vectors.

Answer

Microfilariae multiply in humans.

Answer

None of the above.

Question 7

A disease that is transmitted from vertebrate animals to humans under natural conditions is called:

Accepted Answer

Zoonosis

Answer

Exotic

Answer

Epizoonotic

Answer

Amphixenotic

Question 8

For controlling an outbreak of cholera, all of the following measures are recommended except?

Accepted Answer

Mass chemoprophylaxis

Answer

Proper disposal of excreta

Answer

Chlorination of water

Answer

Early detection and management of cases

Question 9

The Human Poverty Index includes all of the following EXCEPT:

Accepted Answer

Infant mortality

Answer

Longevity

Answer

Knowledge

Answer

Standard of living

Question 10

What type of surveillance is included in an integrated disease control program for non-communicable diseases?

Accepted Answer

Sentinel surveillance

Answer

Regular surveillance

Answer

Periodic regular survey

Answer

Additional state priority

Non-Communicable Diseases — MCQs

Non-Communicable Diseases — MCQs

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