Community Medicine
5 questionsWhat is the osmolarity of the new Oral Rehydration Solution (ORS)?
What is the significance of a 2-year post-treatment surveillance period in paucibacillary leprosy?
Berksonian bias is a type of ?
What is the mean birth weight in India?
What is the best indicator of the availability, utilization, and effectiveness of health services?
NEET-PG 2012 - Community Medicine NEET-PG Practice Questions and MCQs
Question 661: 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 662: What is the significance of a 2-year post-treatment surveillance period in paucibacillary leprosy?
- A. To monitor for treatment compliance during active therapy
- B. To assess the effectiveness of multibacillary leprosy treatment protocols
- C. To detect early signs of drug resistance in ongoing treatment
- D. To identify relapses, reactions, and neurological complications after treatment completion (Correct Answer)
Explanation: ***To identify relapses, reactions, and neurological complications after treatment completion*** - The 2-year post-treatment surveillance period for **paucibacillary leprosy** is crucial for monitoring for **relapses** which can occur even after successful multidrug therapy (MDT). - It also allows for the early detection and management of **leprosy reactions** (e.g., Type 1 reversal reactions) and **neurological complications** such as nerve damage, which can develop or progress after treatment completion. *To monitor for treatment compliance during active therapy* - Monitoring for **treatment compliance** occurs *during* the active 6-month MDT period for paucibacillary leprosy, not primarily in the 2-year post-treatment surveillance phase. - While compliance is essential for successful treatment, the post-treatment period is focused on after-effects. *To assess the effectiveness of multibacillary leprosy treatment protocols* - This surveillance period is specifically for **paucibacillary leprosy**, which has a different treatment regimen and surveillance duration (6 months MDT followed by 2 years surveillance) compared to multibacillary leprosy (12 months MDT followed by 5 years surveillance). - The effectiveness of multibacillary treatment protocols would be assessed over a longer period following completion of its own specific MDT. *To detect early signs of drug resistance in ongoing treatment* - Detection of **drug resistance** is typically assessed *during* treatment if a patient is not responding clinically or shows signs of worsening, or in cases of relapse where drug resistance might be suspected as the cause. - While possible, the primary purpose of post-treatment surveillance is broader than just drug resistance; it encompasses all potential adverse long-term outcomes.
Question 663: Berksonian bias is a type of ?
- A. Selection bias (Correct Answer)
- B. Information bias
- C. Interviewer bias
- D. Recall bias
Explanation: ***Selection bias*** - **Berkson's bias** is a form of **selection bias** that arises in studies conducted using hospital data. - It occurs when the probability of admission to a hospital or inclusion in a study is conditional on both exposure and disease status, leading to a **flawed association** between them. *Interviewer bias* - **Interviewer bias** is a type of **information bias** where the interviewer's expectations or knowledge about the study or participants influence the way information is sought or recorded. - This typically affects the **data collection process** and not the selection of participants. *Information bias* - **Information bias** is a broad category of biases that arise from **systematic errors in measurement** or classification of exposure or disease. - While Berkson's bias can lead to misinformation, its root cause is in how subjects are selected, not how data on those subjects is collected after selection. *Recall bias* - **Recall bias** is a type of **information bias** where there are systematic differences in the way participants **recall past events or exposures**. - It is particularly common in **case-control studies** where individuals with a disease may remember exposures differently than healthy controls.
Question 664: What is the mean birth weight in India?
- A. 2.0 - 2.4 kg
- B. 2.4 - 2.5 kg
- C. 2.5 - 2.9 kg (Correct Answer)
- D. > 3.0 kg
Explanation: ***2.5 - 2.9 kg*** - This range represents the **mean birth weight in India**, which is generally lower than in developed countries due to various factors like maternal nutrition and socio-economic conditions. - A mean birth weight in this range indicates a significant proportion of neonates could be close to the **low birth weight (LBW)** threshold of 2.5 kg. *2.0 - 2.4 kg* - This range is considered **low birth weight (LBW)** and is associated with increased morbidity and mortality; it is not the typical mean birth weight for the general population in India. - While a significant percentage of Indian newborns may fall into this category, it does not represent the average birth weight. *2.4 - 2.5 kg* - This range borders on **low birth weight**; while some average birth weights might fall very close to 2.5 kg, a mean of 2.4 kg would be unusually low for a national average. - A mean in this range suggests that a substantial number of infants would be classified as having **low birth weight**. *> 3.0 kg* - This weight range is typical for newborns in many **developed countries** but is **higher than the observed mean birth weight** in India. - While healthy Indian babies can weigh over 3.0 kg, it is not representative of the average for the entire population.
Question 665: What is the best indicator of the availability, utilization, and effectiveness of health services?
- A. IMR (Correct Answer)
- B. MMR
- C. Hospital bed OCR
- D. DALY
Explanation: ***IMR*** - The **Infant Mortality Rate (IMR)** is widely considered the best single indicator of the availability, utilization, and effectiveness of health services because it reflects the health status of a population and the quality of prenatal, perinatal, and postnatal care. - A lower IMR generally indicates better access to maternal and child healthcare, nutrition, sanitation, and overall societal development. *MMR* - The **Maternal Mortality Ratio (MMR)** reflects the risk of maternal death relative to the number of live births and is a measure of the quality of maternal healthcare services. - While important, MMR focuses specifically on maternal health outcomes and does not encompass the broader availability and effectiveness of health services for all age groups as comprehensively as IMR. *Hospital bed OCR* - **Hospital bed occupancy rate (OCR)** indicates the proportion of available hospital beds that are occupied over a given period, reflecting the utilization of hospital resources. - While it offers insight into hospital efficiency and demand, it does not directly reflect the overall availability, effectiveness, or quality of primary care, preventive services, or broader public health interventions. *DALY* - **Disability-Adjusted Life Years (DALY)** measure the total number of healthy life years lost due to premature mortality and disability from disease or injury. - DALYs provide a comprehensive measure of disease burden but are more focused on quantifying the impact of diseases and injuries on health than on directly assessing the availability, utilization, and effectiveness of health services themselves.
Dental
1 questionsWhat percentage of oral cancer cases is attributed to tobacco use?
NEET-PG 2012 - Dental NEET-PG Practice Questions and MCQs
Question 661: What percentage of oral cancer cases is attributed to tobacco use?
- A. 60% of cases
- B. 10% of cases
- C. 40% of cases
- D. 70% of cases (Correct Answer)
Explanation: ***90%*** - Nicotine is a significant contributor to **oral cancer**, with studies indicating it is responsible for about **90%** of cases [1]. - Its carcinogenic effects are amplified when combined with other risk factors such as **tobacco** and **alcohol** use [1]. *40%* - This percentage underestimates nicotine's role in oral cancer development, which is much higher. - Key studies suggest that the impact of nicotine alone is much greater than **40%**, highlighting its pivotal role in carcinogenesis. *60%* - This estimate also falls short, as the consensus in oncology is that nicotine significantly contributes even beyond **60%**. - Oral cancer risk is further elevated when nicotine is consumed in conjunction with other **carcinogens** [1], rather than just being limited to a single contribution. *10%* - This figure drastically underrepresents nicotine's involvement, as it is a major causative agent in oral cancer. - The **10%** suggestion implies minimal risk, contradicting clinical evidence that strongly supports a far greater role for nicotine. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lung, pp. 738-739.
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 661: 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 questionsWhen should breastfeeding be initiated after a normal delivery?
NEET-PG 2012 - Obstetrics and Gynecology NEET-PG Practice Questions and MCQs
Question 661: When should breastfeeding be initiated after a normal delivery?
- A. 2 hours after delivery
- B. 4 hours after delivery
- C. 6 hours after delivery
- D. Immediately after delivery (Correct Answer)
Explanation: **Correct: Immediately after delivery** - Initiating breastfeeding **within the first hour** of birth (early initiation) is crucial for establishing **successful lactation** and promoting optimal infant health. - This early initiation allows for **skin-to-skin contact**, which helps stabilize the newborn's temperature, heart rate, and breathing, and facilitates **bonding** between mother and baby. - Aligned with **WHO and UNICEF recommendations** for best practice in postpartum care. *Incorrect: 2 hours after delivery* - While earlier is generally better, waiting two hours misses the **optimal window** for initiating feeding and bonding. - The newborn's **alert period** is typically strongest in the first hour post-birth, making it an ideal time for the first latch. *Incorrect: 4 hours after delivery* - Delaying breastfeeding by four hours can make it more challenging for the baby to latch effectively as they may have passed their **initial alert state** and become sleepy. - This delay can also hinder the establishment of the mother's **milk supply**, as stimulation from early feeding is important for prolactin release. *Incorrect: 6 hours after delivery* - Waiting six hours significantly **misses the critical window** for early initiation and can lead to increased difficulties with breastfeeding. - Prolonged delays may necessitate supplementation, potentially interfering with exclusive breastfeeding and establishing a **strong milk supply**.
Ophthalmology
1 questionsAmong the following organisms, which is the most common cause of postoperative endophthalmitis following corneal transplantation?
NEET-PG 2012 - Ophthalmology NEET-PG Practice Questions and MCQs
Question 661: Among the following organisms, which is the most common cause of postoperative endophthalmitis following corneal transplantation?
- A. Streptococcus
- B. Pseudomonas
- C. Propionibacterium acnes
- D. Staph epidermidis (Correct Answer)
Explanation: ***Staph epidermidis*** - **Coagulase-negative Staphylococcus** (CoNS), including *S. epidermidis*, is the most frequent cause of **postoperative endophthalmitis** after both cataract surgery and corneal transplantation due to its presence on the normal ocular flora. - These organisms can form **biofilms on intraocular lenses** or transplanted corneal tissue, making eradication difficult. *Streptococcus* - While *Streptococcus* species can cause endophthalmitis, they are associated with a **more virulent and rapid onset** of severe inflammation and are not the most common causative agents of postoperative endophthalmitis compared to *S. epidermidis*. - They tend to cause more aggressive infections with often **poorer visual outcomes**. *Propionibacterium acnes* - *Propionibacterium acnes* can cause a **late-onset, indolent form of endophthalmitis**, typically months or even years after surgery. - While it is a recognized cause, it is far **less common** than *Staphylococcus epidermidis* in immediate or early postoperative cases. *Pseudomonas* - **Pseudomonas aeruginosa** is an aggressive and rapid-onset pathogen often associated with **severe keratitis** or **post-traumatic endophthalmitis**. - Although it can cause postoperative endophthalmitis, it is **much less common** than coagulase-negative staphylococci due to its infrequency on normal conjunctival flora.
Pharmacology
1 questionsWhat is the primary reason for using a combination of four drugs in Anti-Koch's Treatment (AKT) for tuberculosis?
NEET-PG 2012 - Pharmacology NEET-PG Practice Questions and MCQs
Question 661: 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.