In the context of public health, which statistical measure is most commonly used to assess the variability of health-related data?
Which scheme aims to empower adolescent girls in India through holistic development and empowerment?
What is the caloric value of the nutritional supplement provided for a two-year-old child under the ICDS scheme?
Which of the following is not a source of environmental radiation?
What is the recommended amount of bleaching powder necessary to disinfect stools contaminated with cholera?
Which of the following is not considered an occupational cancer?
At what level is Kit B (basic emergency obstetric care supplies/ASHA kit/immunization supplies) provided in the healthcare system?
What is the statistical term for the value that occurs most frequently in a data set?
The primary reservoir for leptospirosis transmission is:
Botulism is most commonly due to -
NEET-PG 2012 - Community Medicine NEET-PG Practice Questions and MCQs
Question 81: In the context of public health, which statistical measure is most commonly used to assess the variability of health-related data?
- A. Mean
- B. Range
- C. Variance
- D. Standard deviation (Correct Answer)
Explanation: ***Standard deviation*** - The **standard deviation** is the most common measure of **variability** in public health, as it quantifies the average amount of dispersion or spread around the mean. - It is particularly useful because it is expressed in the same units as the original data, making it easy to interpret and compare differences in health outcomes. *Mean* - The **mean** is a measure of **central tendency**, representing the average value of a dataset. - While essential for understanding the typical value, it does not provide information about the **spread or variability** of the data. *Range* - The **range** is the difference between the **maximum and minimum values** in a dataset, offering a rudimentary measure of variability. - It is highly susceptible to **outliers** and does not give a comprehensive picture of data distribution, as it only considers two values. *Variance* - **Variance** measures the average of the **squared differences** from the mean, providing an indication of how far data points deviate from the average. - While closely related to standard deviation, its units are squared, making it less intuitive for direct interpretation of variability compared to the **standard deviation**.
Question 82: Which scheme aims to empower adolescent girls in India through holistic development and empowerment?
- A. Beti Bachao Beti Padhao Scheme
- B. Balika Samriddhi Yojana (Correct Answer)
- C. Kanya Sumangala Yojana
- D. Sukanya Samriddhi Yojana
Explanation: ***Balika Samriddhi Yojana*** - Launched in **1997** by the Government of India specifically to promote the **holistic development and empowerment** of girl children. - Provides **financial assistance** at birth and scholarships at various educational milestones (Class I, III, V, VI-VII, VIII, IX-X) to support their education and development. - Aims to change societal attitudes towards the girl child, reduce gender discrimination, and ensure their **overall development** through sustained financial support. - This scheme directly addresses **empowerment through holistic development** by covering both immediate needs and long-term educational goals. *Sukanya Samriddhi Yojana* - This is a **savings scheme** launched in **2015** as part of the Beti Bachao Beti Padhao campaign. - Focuses on **financial security** through savings for future education and marriage expenses, not holistic development programs. - Parents/guardians deposit money regularly; it does not provide direct financial assistance or scholarships for development milestones. *Beti Bachao Beti Padhao Scheme* - Launched in **2015** as a national campaign to address declining **Child Sex Ratio (CSR)** and promote girls' education. - Primarily an **awareness and advocacy program** focusing on prevention of female feticide and gender-biased sex selection. - While it promotes education and gender equality, it is not a direct empowerment scheme providing financial support for holistic development. *Kanya Sumangala Yojana* - This is a **state-level scheme** launched in **2019** by the Uttar Pradesh government. - Provides financial assistance in six installments from birth to graduation to promote girls' welfare. - While similar in concept to Balika Samriddhi Yojana, it was launched much later and is limited to one state.
Question 83: What is the caloric value of the nutritional supplement provided for a two-year-old child under the ICDS scheme?
- A. 500 Calories
- B. 300 Calories (Correct Answer)
- C. 200 Calories
- D. 400 Calories
Explanation: ***300 Calories*** - Under the **ICDS scheme guidelines in effect in 2012**, children aged 6 months to 6 years were provided a nutritional supplement of **300 kcal per day** along with 8-10g protein. - This supplement aimed to bridge the **nutritional gap** and prevent malnutrition in growing children. - **Note:** ICDS guidelines were subsequently revised (around 2017-2018), and current norms now specify **500 kcal** for the same age group. However, for this 2012 exam question, 300 kcal was the correct answer. *200 Calories* - This caloric value was **insufficient** even under the 2012 ICDS guidelines for meeting the daily supplemental nutritional requirements of a two-year-old child. - Providing only 200 calories would not adequately address the **energy demands** for growth and development in this age group. *400 Calories* - This specific caloric value was **not part of the standard ICDS supplementation schedule** in 2012. - The scheme specified clear categories: 300 kcal for normal children and 500 kcal for severely malnourished children, with no intermediate 400 kcal category. *500 Calories* - Under the **2012 ICDS guidelines**, this caloric value was reserved for **severely malnourished children** aged 6 months to 6 years (Grade III and IV malnutrition). - For a two-year-old with standard or moderate nutritional needs, the supplementation target was **300 kcal**, not 500 kcal. - **Current guidelines** (post-2017) now specify 500 kcal as the standard for all children 6 months to 6 years, but this was not the case in 2012.
Question 84: Which of the following is not a source of environmental radiation?
- A. Uranium
- B. Radon
- C. CO (Correct Answer)
- D. Radium
Explanation: ***CO*** - **Carbon monoxide (CO)** is a toxic gas produced by incomplete combustion, but it is **not radioactive** and thus not a source of environmental radiation. - Its danger comes from its ability to bind to **hemoglobin**, preventing oxygen transport, not from emitting radiation. *Radium* - **Radium** is a highly **radioactive element** found naturally in the environment as a decay product of uranium and thorium. - It emits **alpha and gamma radiation**, contributing significantly to natural background radiation. *Uranium* - **Uranium** is a naturally occurring **radioactive element** found in rocks, soil, and water. - It decays through a series of steps, emitting **alpha, beta, and gamma radiation**, and is a primary source of environmental background radiation. *Radon* - **Radon** is a **radioactive gas** that is formed from the decay of uranium in soil and rocks. - It is a significant source of **indoor environmental radiation exposure** and a known cause of lung cancer.
Question 85: What is the recommended amount of bleaching powder necessary to disinfect stools contaminated with cholera?
- A. 50 gm/liter (Correct Answer)
- B. 75 gm/liter
- C. 90 gm/liter
- D. 100 gm/liter
Explanation: ***50 gm/liter*** - For effective disinfection of stools contaminated with cholera, a concentration of **50 gm of bleaching powder per liter** of stool is recommended to ensure the destruction of **Vibrio cholerae**. - This concentration typically provides a sufficient amount of available **chlorine** to inactivate the bacteria within a reasonable contact time. *75 gm/liter* - While this concentration would certainly disinfect, it is **higher than necessary** for routine cholera stool disinfection and leads to inefficient resource use. - Using excess bleaching powder can also create a **stronger odor** and possibly increase the risk of skin or respiratory irritation. *90 gm/liter* - This concentration is **excessive** and not the standard recommendation for cholera stool disinfection. - Higher concentrations contribute to **waste of resources** and do not offer significantly improved efficacy over the recommended dose for this specific application. *100 gm/liter* - This concentration is significantly **higher than required** for effective disinfection of cholera-contaminated stools. - Using such a high amount is **economically inefficient** and offers no additional benefit in terms of disinfection for this specific pathogen and application.
Question 86: Which of the following is not considered an occupational cancer?
- A. Lung
- B. Breast (Correct Answer)
- C. Liver
- D. Bladder
Explanation: ***Breast*** - Breast cancer has a **limited association** with occupational exposure compared to other cancers [1], mainly influenced by genetic and hormonal factors. - While some studies suggest minor correlations, the **impact of environment** and occupation is considerably less significant for breast cancer. *Bladder* - Strongly linked to **aromatic amines** from dyes and rubber manufacturing [2], as well as exposures to **chemical irritants**. - The **occupational risk** is well-documented, particularly among workers in the chemical industry [1]. *Liver* - Associated with **chemical exposures** such as aflatoxins and certain industrial solvents, particularly in the manufacturing and agriculture sectors. - Significant occupational hazards, like **vinyl chloride**, have demonstrated a clear link to liver cancer [2]. *Lung* - Closely tied to **asbestos** [1][3], **smoke**, and other pollutants, highlighting the role of industrial environments in increasing risk. - **Occupational exposure** remains a major contributor to lung cancer rates, particularly in mining and construction [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, p. 286. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 217-218. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 221-222.
Question 87: At what level is Kit B (basic emergency obstetric care supplies/ASHA kit/immunization supplies) provided in the healthcare system?
- A. PHC
- B. CHC
- C. FRU level
- D. Sub-center (Correct Answer)
Explanation: ***Sub-center*** - **Kit B** is designed for use at the **Sub-center level** within the Indian healthcare system, specifically for **ASHA workers** and other grassroots healthcare providers. - It contains essential supplies for **basic emergency obstetric care**, as well as items for **immunization** and other primary healthcare needs in the community. *PHC* - **Primary Healthcare Centers (PHCs)** are a higher level of care compared to sub-centers and typically have more extensive facilities and a wider range of services. - While PHCs do offer obstetric care and immunization, **Kit B** itself is primarily intended for the more peripheral sub-center operations. *CHC* - **Community Healthcare Centers (CHCs)** serve as referral units for 4-5 PHCs and provide specialist services, including basic surgical and obstetric care. - The level of care and supplies at a CHC is far more comprehensive than what is contained in **Kit B**, which targets basic community-level interventions. *FRU level* - **First Referral Units (FRUs)** are typically equipped to handle all obstetric emergencies, including Caesarean sections and blood transfusions. - The scope of services at an FRU is significantly advanced, requiring a much broader inventory of medical supplies and equipment than what is found in **Kit B**.
Question 88: What is the statistical term for the value that occurs most frequently in a data set?
- A. Median
- B. Mode (Correct Answer)
- C. Standard deviation
- D. Mean
Explanation: ***Mode*** - The **mode** is the value that appears most often in a set of data. - It represents the **most frequent observation** within a dataset. *Median* - The **median** is the middle value in a dataset when the values are arranged in ascending or descending order. - It is a measure of **central tendency** that is less affected by outliers than the mean. *Standard deviation* - **Standard deviation** measures the amount of variation or dispersion of a set of values. - A low standard deviation indicates that the data points tend to be **close to the mean**. *Mean* - The **mean** is the arithmetic average of a dataset, obtained by summing all values and dividing by the number of values. - It is a common measure of **central tendency** but can be influenced by extreme values.
Question 89: The primary reservoir for leptospirosis transmission is:
- A. Rat (Correct Answer)
- B. Cat
- C. Dog
- D. Fish
Explanation: ***Correct Answer: Rat*** - **Rats** (and other rodents) are considered the primary natural reservoir for *Leptospira* bacteria worldwide and are **asymptomatic carriers**. - They excrete the bacteria in their urine, contaminating water and soil, which serves as the main source of human infection. *Incorrect: Cat* - While cats can become infected with *Leptospira*, they are **not typically considered significant reservoirs** for human transmission. - Their role in the epidemiologic cycle of leptospirosis is generally minor compared to rodents and some other mammals. *Incorrect: Dog* - **Dogs** can contract leptospirosis and excrete the bacteria in their urine, posing a risk to humans, but they are generally considered **incidental hosts or secondary reservoirs**, not the primary one. - Vaccination in dogs helps reduce their role in transmission. *Incorrect: Fish* - **Fish are not known to be reservoirs** for *Leptospira* bacteria. - Leptospirosis is primarily transmitted through contact with infected animal urine, not aquatic life like fish.
Question 90: Botulism is most commonly due to -
- A. Egg
- B. Milk
- C. Meat
- D. Home-canned vegetables (Correct Answer)
Explanation: ***Home-canned vegetables*** - **Home-canned vegetables** are the **most common** source of botulism, particularly improperly processed low-acid vegetables like beans, corn, and asparagus - *Clostridium botulinum* spores survive inadequate heat treatment and germinate in the **anaerobic, low-acid environment** of improperly canned foods - The **lack of sufficient heat sterilization** (pressure canning at 121°C/250°F is required) allows spore survival and subsequent toxin production - Most foodborne botulism outbreaks are traced to **home-canned vegetables** rather than commercially processed foods *Meat* - While improperly preserved meats can cause botulism, they are **not the most common source** in epidemiological data - Commercial meat processing standards and refrigeration significantly reduce this risk - Meat-associated botulism is more common in certain cultural practices involving fermented or preserved meats *Egg* - **Eggs** are not associated with botulism as they do not provide the anaerobic environment necessary for *Clostridium botulinum* toxin production - Eggs are more commonly linked to **Salmonella infections** if improperly handled or undercooked *Milk* - **Milk** and dairy products are not typical sources of botulism - **Pasteurization** and refrigeration prevent conditions favorable for *C. botulinum* growth - Dairy products are more associated with **Listeria** or **Campylobacter** if contaminated