NEET-PG 2015 - Community Medicine Practice Questions

Q: Which of the following screening methods is primarily used under the National Tuberculosis Elimination Program (NTEP)?

Passive. ***Passive*** - Under the NTEP, **passive screening** involves individuals presenting to health facilities with symptoms suggestive of TB. - This method relies on **patient self-reporting** and healthcare provider suspicion, rather than active outreach. - Passive case finding is the **primary screening strategy** used across the general population in the NTEP framework. *Active* - **Active screening** involves community-based interventions to proactively identify individuals with TB, often in high-risk populations. - While active case finding is crucial for specific vulnerable groups (contacts, HIV patients, etc.), it is **not the primary screening method** under the standard NTEP framework for initial detection across the entire population. *Mass* - **Mass screening** involves testing large numbers of people in the general population, regardless of symptoms, to detect disease. - This is generally **cost-prohibitive** and not routinely implemented as a primary screening strategy for TB by the NTEP due to resource limitations and low yield in the general population. *None of the options* - **Passive screening** is indeed a primary method used under the NTEP, making this option incorrect. - The NTEP heavily relies on individuals seeking care when they experience symptoms, which aligns with the definition of passive case finding.

Q: Which of the following statements about the Pneumococcal Polysaccharide Vaccine (PPV) is correct?

Recommended for individuals with sickle cell disease. ***Recommended for individuals with sickle cell disease*** - Individuals with **sickle cell disease** are at significantly increased risk of severe and invasive **pneumococcal infections** due to **functional asplenia**. - The PPV is crucial for providing **prophylactic protection** against these life-threatening infections in this vulnerable population. *Administered at birth* - The **Pneumococcal Conjugate Vaccine (PCV)** is part of routine childhood immunizations and is administered at specific ages, but neither PCV nor PPV is given **at birth**. - **PCV** is typically given starting at **2 months of age**, while **PPV** is generally recommended for older children and adults at high risk. *Widely used in the general population* - The **Pneumococcal Conjugate Vaccine (PCV)** is widely used in the general *pediatric* population as part of routine immunization schedules. - The **Pneumococcal Polysaccharide Vaccine (PPV)** is primarily recommended for **adults 65 years and older** and individuals with certain **underlying medical conditions** or compromised immune systems, not the general population. *Derived from live attenuated pneumococcal bacteria* - The **PPV** is a **polysaccharide vaccine**, meaning it is composed of purified capsular polysaccharides from various serotypes of *Streptococcus pneumoniae*. - It is an **inactivated vaccine** and does not contain live attenuated bacteria; such a vaccine would be contraindicated in immunocompromised individuals.

Q: What distance from a water source defines a problem village according to the Government of India?

> 1.6 km. ***> 1.6 km*** - According to the **Government of India's criteria**, a village is designated as a **problem village** if its residents have to travel more than **1.6 kilometers** to access a safe and assured source of drinking water. - This definition is crucial for identifying areas that require specific interventions and programs to improve water access. *> 0.5 km* - While a distance of 0.5 km might be considered inconvenient, it does not meet the **official threshold** set by the Government of India for categorizing a village as "problematic" regarding water access. - This distance is typically much shorter than the criteria used for policy and intervention planning. *> 1 km* - A distance of 1 km, like 0.5 km, falls short of the **established benchmark** of 1.6 km defined by the Government of India for identifying a problem village. - Although it represents a significant walk, it does not trigger the specific **policy responses** associated with problem village status. *None of the options* - This option is incorrect because **1.6 km** is indeed the specific distance recognized by the Government of India for defining a problem village in terms of water source accessibility. - The other options are incorrect as they do not match the official criteria.

Q: Which of the following statements is incorrect regarding the strategic plan for malaria control 2012-2017?

Objective is API < 1 per 10,000. ***Objective is API < 1 per 10,000*** - The correct objective for the **Annual Parasite Incidence (API)** in the 2012-2017 strategic plan for malaria control was to reduce it to **less than 1 per 1,000 population**, not 1 per 10,000, making this statement incorrect. - This metric measures the number of new malaria cases per 1,000 people per year. *50% reduction in mortality by 2017* - A key objective of the **National Framework for Malaria Elimination in India** (which this strategic plan aimed to contribute to) was indeed to achieve a significant reduction in malaria-related mortality. - Specifically, aiming for a **50% reduction in mortality** by 2017 was a stated goal to lessen the disease burden. *Annual incidence < 1 per 1000 by 2017* - One of the primary goals of the **Malaria Control Strategic Plan 2012-2017** was to reduce the annual parasite incidence (API) to **less than 1 per 1,000 population** in all endemic areas. - This target focused on decreasing the occurrence of new malaria cases. *Complete treatment to 100% of patients* - A core component of malaria control strategies emphasizes ensuring that **all confirmed malaria cases** receive complete and effective treatment. - Achieving **100% complete treatment adherence** is crucial to prevent drug resistance and eliminate the parasite reservoir.

Q: What term is used for a patient who is kept under observation in a hospital for a short period (typically less than 48 hours) to determine if formal admission is necessary?

Observation status. ***Observation status*** - Patients under **observation status** are monitored in a hospital setting for a short period (typically less than 24-48 hours) to determine if inpatient admission is necessary. - This status is used when the medical condition is uncertain, requiring further evaluation and diagnostic tests to guide treatment decisions. *Inpatient* - An **inpatient** is formally admitted to the hospital for an expected stay of more than 24 hours, often requiring a hospital bed overnight. - This classification is associated with specific billing and care delivery models distinct from observation status. *Outpatient* - An **outpatient** receives medical care at a hospital, clinic, or doctor's office without being admitted for an overnight stay. - Examples include routine check-ups, specialist consultations, and minor surgical procedures performed on the same day. *Urgent care patient* - An **urgent care patient** receives immediate medical attention for illnesses or injuries that are not life-threatening but require prompt treatment. - This care is typically provided in an urgent care clinic, not usually in a hospital setting for 24-hour observation.

Q: Under NTEP, what is the honorarium given to a DOTS provider after the completion of treatment?

500 INR. ***500 INR*** - Under the **National Tuberculosis Elimination Programme (NTEP)**, a **DOTS provider** receives an honorarium of **INR 500** upon the successful completion of tuberculosis treatment for a **new TB patient**. - This incentive, revised from the earlier amount of INR 250, aims to recognize the crucial role of DOTS providers in ensuring treatment adherence and successful outcomes. - The increased honorarium reflects the government's commitment to incentivizing community participation in TB elimination. *150 INR* - This amount is **significantly lower than the stipulated honorarium** for a DOTS provider upon treatment completion under current NTEP guidelines. - The correct incentive for successful completion of treatment is INR 500 for new TB cases. *250 INR* - This was the **earlier honorarium amount** under the previous NTEP guidelines, which has since been **revised upward**. - Under the current NTEP incentive structure, the honorarium for treatment completion has been increased to INR 500. *1000 INR* - This amount is **higher than the designated honorarium** for a DOTS provider upon treatment completion under NTEP. - While this figure may apply to other incentive schemes or different milestones, the standard honorarium for new TB case completion is INR 500.

Q: Which of the following vaccines is not freeze-dried?

Diphtheria, Pertussis, and Tetanus (DPT) Vaccine. ***Diphtheria, Pertussis, and Tetanus (DPT) Vaccine*** - The DPT vaccine is a **liquid vaccine** that contains inactivated toxins and bacterial components, making it stable in liquid form. - It does not require **freeze-drying** because its components are chemically stable and do not degrade significantly in solution. *Measles Vaccine* - The measles vaccine is a **live attenuated vaccine** that needs to be freeze-dried to maintain the viability and stability of the live virus. - Freeze-drying helps preserve the vaccine's potency by removing water, which prevents degradation during storage and transport. *Rubella Vaccine* - Similar to the measles vaccine, the rubella vaccine is a **live attenuated vaccine** and is therefore provided in a freeze-dried form. - This process ensures the long-term stability and efficacy of the viral components, which would otherwise degrade in a liquid state. *BCG Vaccine* - The BCG (Bacillus Calmette-Guérin) vaccine is a **live attenuated bacterial vaccine** used against tuberculosis, and it is also manufactured as a freeze-dried product. - Freeze-drying is essential for maintaining the viability of the live attenuated *Mycobacterium bovis* strain.

Q: Which vaccine is the most widely used globally in childhood vaccination programs, aside from the Oral Polio Vaccine (OPV)?

DPT vaccine. ***DPT vaccine*** - The **DPT (diphtheria, pertussis, and tetanus) vaccine** is the most widely used childhood vaccine globally after OPV, forming the backbone of the **WHO's Expanded Programme on Immunization (EPI)**. - It has **near-universal adoption** across countries worldwide with approximately **86% global coverage** and is administered as a **3-dose primary series** to all children, making it the standard benchmark for measuring immunization program performance. - Its widespread use reflects the global burden of these three bacterial diseases and the vaccine's proven efficacy in preventing severe outcomes and transmission. *BCG vaccine* - The **BCG (Bacillus Calmette-Guérin) vaccine** protects against **tuberculosis** and is widely used, particularly in countries with high TB prevalence. - However, its use is **not universal** – many countries with low TB incidence (such as the USA and several European nations) do not include BCG in routine childhood schedules, limiting its global "universality" compared to DPT. - BCG is typically given as a **single dose at birth**, whereas DPT requires multiple doses throughout infancy. *Influenza vaccine* - The **influenza vaccine** is recommended annually due to antigenic drift of the virus, but its global childhood vaccination coverage is significantly lower compared to standard EPI vaccines like DPT. - It is often prioritized for specific risk groups rather than universal immunization for all children in many parts of the world. *Pneumococcal vaccine* - The **pneumococcal vaccine** targets **Streptococcus pneumoniae**, a cause of pneumonia, meningitis, and other severe diseases. - While increasingly integrated into national immunization schedules, its global adoption (especially as of 2015) was still lower than DPT, with many low- and middle-income countries only recently introducing it.

Q: Which of the following infectious diseases has the highest proportion of asymptomatic chronic carriers?

Hepatitis B. ***Hepatitis B*** - **Hepatitis B** infection has a significant proportion of **chronic asymptomatic carriers**, particularly when infection occurs perinatally or in early childhood. - In adults, approximately **5% develop chronic infection** after acute exposure, and many of these chronic carriers remain asymptomatic while maintaining infectivity. - Chronic carriers can harbor the virus for years or decades without clinical symptoms, making them an important reservoir for transmission. - This is a major public health concern as asymptomatic carriers can unknowingly transmit the virus. *Measles* - **Measles** is highly contagious and typically presents with **symptomatic disease** in nearly all infected individuals. - Clinical features include characteristic maculopapular rash, cough, coryza, conjunctivitis, and Koplik's spots. - Asymptomatic infection is **extremely rare** with measles virus. *Diphtheria* - While **asymptomatic pharyngeal carriage** of *Corynebacterium diphtheriae* can occur, it is not the predominant pattern. - Clinical diphtheria typically presents with pseudomembrane formation, sore throat, and potential systemic toxin effects. - Carrier rates vary but are not as epidemiologically significant as with Hepatitis B. *Rabies* - **Rabies** is almost **100% symptomatic** once the virus reaches the central nervous system. - There is **no chronic asymptomatic carrier state** in humans. - Once clinical symptoms appear (encephalitis, hydrophobia, paralysis), the disease is virtually always fatal.

Q: Which of the following statements about influenza infectivity is correct?

All of the options are correct.. ***All of the options are correct.*** - All statements provided accurately describe aspects of influenza infectivity and epidemiology. - The **communicable period**, the **primary source of infection**, and the potential for **subclinical cases** are all characteristic features of influenza. *Communicable period is 1 day before to 5-7 days after the onset of symptoms* - This statement is accurate, as influenza is transmissible **before symptom onset** and for several days afterward, which contributes to its rapid spread. - Peak viral shedding often occurs just before and in the first few days of symptomatic illness. - Adults typically shed virus from 1 day before to 5-7 days after symptom onset (can be longer in children and immunocompromised individuals). *The primary source of infection is a clinical case.* - This is correct, as **symptomatic individuals (clinical cases) are the PRIMARY source** of influenza virus transmission to others. - Respiratory droplets produced by coughing, sneezing, or talking from an infected person are the main mode of spread. - While subclinical cases can transmit, clinical cases with overt symptoms produce more respiratory droplets and are the major drivers of transmission. *There can be subclinical cases of influenza.* - This statement is correct; many individuals infected with influenza virus experience **mild or asymptomatic infections** (subclinical cases). - These subclinical cases can still transmit the virus, though typically to a lesser extent than symptomatic cases, further complicating control efforts.

Question 1

Which of the following screening methods is primarily used under the National Tuberculosis Elimination Program (NTEP)?

Accepted Answer

Passive

Answer

Active

Answer

Mass

Answer

None of the options

Question 2

Which of the following statements about the Pneumococcal Polysaccharide Vaccine (PPV) is correct?

Accepted Answer

Recommended for individuals with sickle cell disease

Answer

Administered at birth

Answer

Widely used in the general population

Answer

Derived from live attenuated pneumococcal bacteria

Question 3

What distance from a water source defines a problem village according to the Government of India?

Accepted Answer

> 1.6 km

Answer

> 0.5 km

Answer

> 1 km

Answer

None of the options

Question 4

Which of the following statements is incorrect regarding the strategic plan for malaria control 2012-2017?

Accepted Answer

Objective is API < 1 per 10,000

Answer

50% reduction in mortality by 2017

Answer

Complete treatment to 100% of patients

Answer

Annual incidence < 1 per 1000 by 2017

Question 5

What term is used for a patient who is kept under observation in a hospital for a short period (typically less than 48 hours) to determine if formal admission is necessary?

Accepted Answer

Observation status

Answer

Inpatient

Answer

Outpatient

Answer

Urgent care patient

Question 6

Under NTEP, what is the honorarium given to a DOTS provider after the completion of treatment?

Accepted Answer

500 INR

Answer

150 INR

Answer

1000 INR

Answer

250 INR

Question 7

Which of the following vaccines is not freeze-dried?

Accepted Answer

Diphtheria, Pertussis, and Tetanus (DPT) Vaccine

Answer

Measles Vaccine

Answer

Rubella Vaccine

Answer

BCG Vaccine

Question 8

Which vaccine is the most widely used globally in childhood vaccination programs, aside from the Oral Polio Vaccine (OPV)?

Accepted Answer

DPT vaccine

Answer

BCG vaccine

Answer

Influenza vaccine

Answer

Pneumococcal vaccine

Question 9

Which of the following infectious diseases has the highest proportion of asymptomatic chronic carriers?

Accepted Answer

Hepatitis B

Answer

Measles

Answer

Rabies

Answer

Diphtheria

Question 10

Which of the following statements about influenza infectivity is correct?

Accepted Answer

All of the options are correct.

Answer

Communicable period is 1 day before to 5-7 days after the onset of symptoms

Answer

There can be subclinical cases of influenza.

Answer

The primary source of infection is a clinical case.

NEET-PG 2015 — Community Medicine