Community Medicine
5 questionsWhat is the osmolarity of the new Oral Rehydration Solution (ORS)?
Which of the following is not typically screened for in blood donations?
Which of the following is not classified as a special incidence rate?
What is the role of iodized salt in the iodine deficiency control programme?
What is the most common method of family planning sterilization practiced in India?
NEET-PG 2012 - Community Medicine NEET-PG Practice Questions and MCQs
Question 541: What is the osmolarity of the new Oral Rehydration Solution (ORS)?
- A. 270
- B. 245 (Correct Answer)
- C. 290
- D. 310
Explanation: ***245*** - The **new ORS (reduced osmolarity ORS)** has an osmolarity of **245 mOsmol/L**. - This reduced osmolarity formulation has been shown to be more effective in reducing stool output, vomiting, and duration of diarrhea compared to the standard ORS. *270* - While 270 mOsmol/L is closer to the target, it is not the exact osmolarity of the **new ORS formulation**. - The precise osmolarity of the new ORS is specifically designed for optimal water and electrolyte absorption. *290* - The **standard (or traditional) ORS** had an osmolarity of **310 mOsmol/L**, which is higher than 290 mOsmol/L. - An osmolarity of 290 mOsmol/L does not correspond to a recognized standard or new ORS formulation. *310* - The **standard (or traditional) ORS** formulation had an osmolarity of **310 mOsmol/L**. - The move to a new ORS with reduced osmolarity was to improve efficacy and reduce the risk of hypernatremia in some patients.
Question 542: Which of the following is not typically screened for in blood donations?
- A. HIV
- B. HBV
- C. HCV
- D. Epstein-Barr Virus (EBV) (Correct Answer)
Explanation: ***Epstein-Barr Virus (EBV)*** ✓ - EBV is **NOT routinely screened** for in blood donations in India and most countries - While EBV is a common virus (>90% adults are seropositive), it is **not considered a major transfusion-transmitted infection** - The virus is primarily transmitted through saliva; transfusion-associated EBV transmission is **extremely rare and usually not clinically significant** in immunocompetent recipients - Risk-benefit analysis does not support routine screening due to **high prevalence, low clinical impact, and cost considerations** - EBV screening may only be considered for specific recipients (e.g., severely immunocompromised patients) *HIV* - **Routinely screened** in all blood donations worldwide - Screening includes HIV-1 and HIV-2 antibodies and/or HIV antigen/RNA testing - Transfusion-transmitted HIV causes AIDS with severe consequences - Mandatory screening under the Drugs and Cosmetics Act in India *HBV* - **Routinely screened** in all blood donations - Screening includes HBsAg (Hepatitis B surface antigen) testing, and often anti-HBc or HBV DNA - Can cause acute and chronic hepatitis, cirrhosis, and hepatocellular carcinoma - Mandatory screening in India and globally *HCV* - **Routinely screened** in all blood donations - Screening includes anti-HCV antibodies and/or HCV RNA (nucleic acid testing) - Major cause of chronic hepatitis, cirrhosis, and liver cancer - Mandatory screening under blood safety regulations
Question 543: Which of the following is not classified as a special incidence rate?
- A. Attack rate
- B. Secondary attack rate
- C. Hospital admission rate
- D. Standardized mortality rate (Correct Answer)
Explanation: ***Standardized mortality rate*** - This is a measure used to compare **mortality rates** between different populations, adjusting for age or other confounding factors. - It is a **standardized mortality measure**, not an incidence rate, and therefore not classified as a special incidence rate. - Special incidence rates measure the occurrence of **new cases** in specific circumstances, whereas SMR is a **comparative mortality metric**. *Attack rate* - The **attack rate** is a classic **special incidence rate** used to describe the proportion of people in a population who became ill during an **epidemic or outbreak**. - It is specifically calculated during a **short, well-defined period**, often relevant to foodborne illnesses or infectious disease outbreaks. *Secondary attack rate* - The **secondary attack rate** is a **special incidence rate** that measures the proportion of susceptible people who develop a disease after being exposed to a **primary case** within a defined population (e.g., household contacts). - It quantifies the **spread of an infectious agent** within a closed population after its introduction. *Hospital admission rate* - This is a **health service utilization indicator** that measures hospital admissions in a population during a specified period. - It is **not classified as a special incidence rate** in standard epidemiological teaching, as it reflects healthcare utilization rather than disease occurrence in outbreak situations.
Question 544: What is the role of iodized salt in the iodine deficiency control programme?
- A. Primary prevention of iodine deficiency (Correct Answer)
- B. Secondary prevention of iodine deficiency
- C. Tertiary prevention of iodine deficiency
- D. Not applicable
Explanation: ***Primary prevention of iodine deficiency*** - **Iodized salt** is a population-wide strategy to ensure adequate **iodine intake** in communities, preventing deficiency before it even occurs. - It aims to maintain normal **thyroid hormone** production and prevent disorders like **goiter** and **cretinism** in healthy individuals. *Secondary prevention of iodine deficiency* - **Secondary prevention** focuses on early diagnosis and prompt treatment in individuals already showing signs of a disease to prevent progression. - While screening for **iodine deficiency disorders (IDD)** might be secondary prevention, the universal use of iodized salt is not targeted at already deficient individuals but at the entire population. *Tertiary prevention of iodine deficiency* - **Tertiary prevention** involves managing existing conditions to prevent complications, reduce disability, and improve quality of life after a disease has manifested. - This would involve treating conditions like **severe hypothyroidism** or **cretinism** that result from prolonged iodine deficiency, for which **iodized salt** is not a direct treatment but a preventative measure. *Not applicable* - This option is incorrect as **iodized salt** plays a crucial and well-established role in public health for controlling **iodine deficiency**. - The scientific evidence and public health initiatives globally highlight its significant applicability in preventing **iodine deficiency disorders**.
Question 545: What is the most common method of family planning sterilization practiced in India?
- A. Female sterilization (Correct Answer)
- B. Male sterilization
- C. Intrauterine device (IUD)
- D. Condom use
Explanation: ***Female sterilization*** - **Female sterilization** (tubal ligation) is the most prevalent method of permanent contraception in India, accounting for over **95% of all sterilization procedures**. - This is primarily due to historical policies focusing on female methods and various **socio-cultural factors** including gender norms and male reluctance. - According to **NFHS data**, female sterilization is the single most common contraceptive method overall in India. *Male sterilization* - **Male sterilization** (vasectomy) is significantly less common compared to female sterilization in India, accounting for less than 5% of sterilization procedures. - This disparity is attributed to **gender norms**, misconceptions about masculinity, and limited promotion of vasectomy services. *Condom use* - While condoms are a common **temporary contraceptive method**, the question specifically asks about **sterilization methods**, which are permanent. - Condoms are barrier methods, not sterilization procedures. *Intrauterine device (IUD)* - IUDs are **reversible long-acting contraceptive methods**, not sterilization procedures. - Though IUDs are increasingly popular in India, they do not constitute a sterilization method as they can be removed.
Internal Medicine
1 questionsWhat is the primary electrolyte found in Oral Rehydration Salts (ORS) at a concentration of 75 mEq/L?
NEET-PG 2012 - Internal Medicine NEET-PG Practice Questions and MCQs
Question 541: What is the primary electrolyte found in Oral Rehydration Salts (ORS) at a concentration of 75 mEq/L?
- A. Sodium (Correct Answer)
- B. Potassium
- C. Glucose
- D. Chloride
Explanation: ***Sodium*** - The primary electrolyte in **Oral Rehydration Salts (ORS)** is **sodium**, which is crucial for replacing losses due to diarrhea and facilitating water absorption in the intestines [1]. - The standard ORS formulation, recommended by the WHO, contains **75 mEq/L of sodium** to effectively rehydrate individuals with acute watery diarrhea [1]. *Potassium* - While **potassium** is an essential electrolyte found in ORS, its concentration is typically lower than sodium, usually around **20 mEq/L**. - Potassium helps replenish intracellular losses and supports normal cellular function, but it is not the primary electrolyte at the 75 mEq/L concentration. *Glucose* - **Glucose** is a crucial component of ORS, but it is a sugar, not an electrolyte. - Its role is to facilitate the co-transport of **sodium and water** across the intestinal wall, enhancing fluid absorption, but it does not contribute to the electrolyte concentration in mEq/L [1]. *Chloride* - **Chloride** is an electrolyte present in ORS, primarily to balance the charge of **sodium** and prevent hyynatremia. - Its concentration is typically around **65 mEq/L**, making it slightly less concentrated than sodium but still vital for maintaining electrolyte balance.
Obstetrics and Gynecology
1 questionsIn which period is maternal mortality highest?
NEET-PG 2012 - Obstetrics and Gynecology NEET-PG Practice Questions and MCQs
Question 541: In which period is maternal mortality highest?
- A. Antepartum
- B. Peripartum (Correct Answer)
- C. Postpartum
- D. No period of maximum risk
Explanation: ***Peripartum*** - The peripartum period encompasses the time immediately before, during, and after childbirth, when the risks of **hemorrhage, infection, pre-eclampsia/eclampsia**, and other **acute obstetric complications** are highest. - The **physiological stresses** of labor and delivery, coupled with potential complications like **uterine atony** or **obstructed labor**, contribute significantly to maternal mortality during this critical window [2]. *Antepartum* - While complications like **severe pre-eclampsia, ectopic pregnancy**, and chronic conditions can occur during the antepartum period, the **acute risks of hemorrhage and infection** are generally lower than during and immediately after delivery [1]. - Most maternal deaths occurring antepartum are due to conditions that ultimately lead to or manifest more severely during the peripartum or postpartum phases, such as undetected pre-eclampsia worsening to eclampsia [3]. *Postpartum* - The postpartum period (especially the first 42 days) also carries significant risks such as **late postpartum hemorrhage, puerperal sepsis, and thromboembolism** [2]. - While substantial, the **magnitude of mortality risk** primarily due to acute events related to labor and delivery (e.g., massive hemorrhage, amniotic fluid embolism) is often concentrated in the peripartum period [2]. *No period of maximum risk* - This statement is incorrect because maternal mortality risk is demonstrably **higher during specific periods** related to pregnancy and childbirth, rather than being evenly distributed [1]. - The physiological changes and obstetric challenges associated with gestation, labor, and the puerperium create distinct periods of elevated risk for maternal morbidity and mortality.
Pharmacology
2 questionsWhat is the primary reason for using a combination of four drugs in Anti-Koch's Treatment (AKT) for tuberculosis?
What is the primary cardiotoxic effect of bupivacaine?
NEET-PG 2012 - Pharmacology NEET-PG Practice Questions and MCQs
Question 541: What is the primary reason for using a combination of four drugs in Anti-Koch's Treatment (AKT) for tuberculosis?
- A. To decrease the risk of resistance due to mutation. (Correct Answer)
- B. To decrease the risk of resistance due to conjugation.
- C. To enhance overall treatment efficacy.
- D. To simplify treatment.
Explanation: ***To decrease the risk of resistance due to mutation*** - **Tuberculosis bacteria** can spontaneously develop resistance to a single drug through **random genetic mutations**. - Using multiple drugs simultaneously significantly reduces the probability that a bacterium will spontaneously develop resistance to **all drugs** in the regimen. - This is the **primary rationale** for multi-drug therapy in TB, as emphasized by WHO guidelines. *To decrease the risk of resistance due to conjugation* - **Conjugation** is a mechanism of horizontal gene transfer in bacteria, primarily involving the transfer of plasmids. - While important for antibiotic resistance in some bacteria, it is **not the primary mechanism** of resistance development in *Mycobacterium tuberculosis*. - TB resistance develops mainly through **chromosomal mutations**, not plasmid transfer. *To enhance overall treatment efficacy* - While multi-drug regimens do enhance treatment efficacy by targeting different bacterial populations (actively dividing, slow-growing, dormant), this is a **consequence** of the multi-drug approach. - The **primary reason** for using four drugs specifically is to prevent the emergence of **drug-resistant mutants**. - Enhanced efficacy is achieved *because* resistance is prevented, making this a secondary benefit. *To simplify treatment* - A four-drug regimen actually makes treatment more **complex** due to multiple pills, potential drug interactions, and increased side effects. - The complexity is a necessary trade-off for **resistance prevention** and treatment success.
Question 542: What is the primary cardiotoxic effect of bupivacaine?
- A. Depressed pacemaker activity (Correct Answer)
- B. Toxic compound damaging myocardial cells
- C. Depressed neural control on heart
- D. Vascular thrombosis and Myocardial ischemia
Explanation: ***Depressed pacemaker activity*** - **Bupivacaine** is a potent **local anesthetic** that blocks voltage-gated **sodium channels** in myocardial cells with **high affinity** and **slow dissociation kinetics**. - This prolonged channel blockade leads to decreased cardiac excitability and **depressed automaticity** of pacemaker cells, particularly affecting the **SA node** and **His-Purkinje system**. - Results in slowing of the **heart rate**, **bradyarrhythmias**, **conduction blocks**, and potentially **ventricular arrhythmias** or **asystole**. - Bupivacaine is **more cardiotoxic** than other local anesthetics due to its **lipophilicity** and prolonged binding to cardiac sodium channels. *Toxic compound damaging myocardial cells* - While **bupivacaine** is cardiotoxic, its primary mechanism is not direct **cellular damage** through cytotoxic effects, oxidative stress, or cell membrane lysis. - The toxicity is predominantly due to **electrophysiological effects** on ion channels, interfering with normal cardiac conduction and contractility. *Depressed neural control on heart* - **Bupivacaine's** cardiotoxicity primarily affects the **myocardium directly** through sodium channel blockade, rather than indirectly through the **autonomic nervous system**. - Although high systemic concentrations can affect the **central nervous system** (causing seizures and CNS depression), the direct cardiac effects occur independently of neural influence. *Vascular thrombosis and Myocardial ischemia* - **Bupivacaine** cardiotoxicity does not typically involve formation of **thrombi** or mechanisms leading to **myocardial ischemia** through coronary artery occlusion. - Its effects are predominantly on the **electrical conduction system**, **myocardial contractility**, and **cardiac ion channels**, not the vascular supply to the heart.
Physiology
1 questionsWhat does colostrum have compared to normal milk?
NEET-PG 2012 - Physiology NEET-PG Practice Questions and MCQs
Question 541: What does colostrum have compared to normal milk?
- A. Increased proteins (Correct Answer)
- B. Decreased potassium
- C. Decreased sodium
- D. Decreased calories
Explanation: ***Increased proteins*** - **Colostrum** is rich in **immunoglobulins (antibodies)** like IgA, IgG, and IgM, which are proteins crucial for passive immunity in the newborn, making its protein content **2-3 times higher** than mature milk (approximately 2.3 g/100 mL vs 0.9 g/100 mL). - These high protein levels also include **lactoferrin** and **growth factors**, which support the development of the infant's gut and immune system. - This is the **most clinically significant** distinguishing feature of colostrum. *Decreased potassium* - **Potassium (K)** levels in colostrum are actually **similar to or slightly higher** than mature milk (approximately 74 mg/100 mL vs 51 mg/100 mL). - This option is incorrect as potassium is not decreased. *Decreased sodium* - **Sodium (Na)** levels are actually **significantly higher** in colostrum than in mature milk (approximately 48 mg/100 mL vs 15 mg/100 mL). - This elevated sodium gives colostrum a distinct salty taste, differentiating it from mature milk. - This option is incorrect as sodium is increased, not decreased. *Decreased calories* - While colostrum has a **lower fat content** than mature milk, leading to somewhat lower caloric density (54-58 kcal/100 mL vs 65-70 kcal/100 mL), this is not the primary distinguishing characteristic. - The most important feature of colostrum is its **high protein and immunoglobulin content** for immune protection, not its caloric value.