Pediatric Nutrition — MCQs

Pediatric Nutrition Indian Medical PG Practice Questions and MCQs

Question 391: A 5-year-old child is diagnosed with vitamin A deficiency. Which of the following signs is most indicative of this deficiency?

A. Night blindness (Correct Answer)
B. Rickets
C. Beriberi
D. Scurvy

Explanation: ***Night blindness*** - **Night blindness** (nyctalopia) is one of the earliest and most specific signs of **vitamin A deficiency**, as vitamin A is crucial for the formation of **rhodopsin**, a photopigment in rod cells. - Deficiency impairs the eye's ability to adapt to low light conditions, leading to difficulty seeing in dim light. *Rickets* - **Rickets** is caused by a **vitamin D deficiency** and is characterized by inadequate mineralization of bone, leading to weakened and softened bones. - Clinically, it presents with bone deformities like bowed legs, enlarged wrists, and delayed closure of fontanelles, which are distinct from vitamin A deficiency symptoms. *Beriberi* - **Beriberi** results from a **thiamine (vitamin B1) deficiency** and primarily affects the cardiovascular and nervous systems. - Symptoms can include peripheral neuropathy, heart failure, and Wernicke-Korsakoff syndrome, which are not associated with vitamin A. *Scurvy* - **Scurvy** is caused by a **vitamin C deficiency** and is characterized by impaired collagen synthesis. - Symptoms include bleeding gums, easy bruising, poor wound healing, and joint pain, which are unrelated to vision or vitamin A's role.

Question 392: What is the osmolarity of F-100, a therapeutic milk formula used in the treatment of severe acute malnutrition?

A. 399 mOsm/L
B. 409 mOsm/L
C. 419 mOsm/L (Correct Answer)
D. 429 mOsm/L

Explanation: ***419 mOsm/L*** - The standard **osmolarity of F-100 therapeutic milk** is approximately **419 mOsm/L**, which is crucial for its efficacy in treating severe acute malnutrition. - This **specific osmolarity** is designed to provide adequate nutritional support while minimizing the risk of refeeding syndrome and other complications in malnourished children. *399 mOsm/L* - This value is **lower than the standard osmolarity of F-100** and would not meet the nutritional and osmotic requirements for optimal treatment of severe acute malnutrition. - Using a formula with a **lower osmolarity** could potentially lead to less effective repletion of fluid and electrolytes. *409 mOsm/L* - While closer, this value is **still below the established osmolarity** for F-100, which is intentionally formulated to be slightly hyperosmolar to facilitate nutrient absorption. - Small deviations in **osmolarity** can affect the physiological impact of the formula on a severely malnourished child. *429 mOsm/L* - This osmolarity is **higher than the recommended level for F-100** and could potentially increase the risk of complications such as osmotic diarrhea or renal solute load in severely malnourished infants. - Maintaining the correct **osmolarity** is vital for safe and effective nutritional rehabilitation.

Question 393: A 3-year-old child is brought to the clinic with severe malnutrition and presents with flaky paint dermatitis. What is the most likely diagnosis?

A. Marasmus
B. Kwashiorkor (Correct Answer)
C. Pellagra
D. Zinc deficiency

Explanation: ***Kwashiorkor*** - This condition is primarily caused by **protein deficiency** and is characterized by **edema**, **flaky paint dermatitis**, and often a distended abdomen despite muscle wasting. - The **flaky paint dermatitis** (desquamating skin lesions) is a classic dermatological manifestation of severe protein malnutrition. *Marasmus* - Marasmus results from severe **total caloric deficiency**, leading to extreme **wasting of muscle and fat**, giving a 'skin and bones' appearance. - While there is severe malnutrition, it typically **lacks the edema** and classic dermatological changes like flaky paint dermatitis seen in kwashiorkor. *Pellagra* - Pellagra is caused by a **niacin (Vitamin B3) deficiency** and is characterized by the "4 D's": **dermatitis**, diarrhea, dementia, and death. - The dermatitis in pellagra is typically found in **sun-exposed areas** and is sharply demarcated, unlike the widespread flaky paint dermatitis of kwashiorkor. *Zinc deficiency* - Zinc deficiency can cause a variety of skin lesions, including **acrodermatitis enteropathica**, which affects the mouth, anus, and extremities with vesicular or pustular eruptions. - While it can manifest with skin issues, the characteristic **flaky paint dermatitis** described is not solely indicative of zinc deficiency.

Question 394: A 2-year-old child with a history of eczema presents with a red, scaly rash around the mouth and extremities. A dietary history reveals excessive consumption of cow's milk. What nutritional deficiency is most likely?

A. Zinc deficiency (Correct Answer)
B. Iron deficiency
C. Vitamin D deficiency
D. Vitamin C deficiency

Explanation: ***Zinc deficiency*** - The combination of **eczema**, perioral and acral **dermatitis** (red, scaly rash around the mouth and extremities), and a diet rich in **cow's milk** in a 2-year-old strongly points to zinc deficiency. - Cow's milk can inhibit **zinc absorption**, and infants with eczema may have increased zinc demands or impaired absorption. *Iron deficiency* - While common in toddlers, especially with high cow's milk intake, **iron deficiency** primarily manifests as **anemia**, pallor, and fatigue, not a characteristic rash. - It does not typically cause the specific **dermatitis** described. *Vitamin D deficiency* - Primarily linked to **rickets** in children, causing bone deformities and growth delays. - Does not present with a **red, scaly rash** around the mouth and extremities. *Vitamin C deficiency* - Leads to **scurvy**, characterized by swollen, bleeding gums, perifollicular hemorrhages, and poor wound healing. - The described **dermatological symptoms** are not typical of vitamin C deficiency.

Question 395: What is the most reliable indicator for assessing acute malnutrition in infants?

A. Weight-for-age
B. Height-for-age
C. Mid-upper arm circumference
D. Weight-for-length (Correct Answer)

Explanation: ***Weight-for-length*** - **Weight-for-length** is the **most reliable indicator for acute malnutrition (wasting)** in infants and young children. - It reflects **current nutritional status** and can distinguish between acute and chronic malnutrition. - According to **WHO guidelines**, it is the preferred indicator for assessing wasting in children under 2 years. - Independent of age and can identify children who are thin for their height, indicating recent weight loss or failure to gain weight. *Weight-for-age* - **Weight-for-age** is a composite index reflecting both **height-for-age and weight-for-length**. - **Major limitation**: Cannot distinguish between a child who is underweight because of **stunting** (chronic malnutrition) or **wasting** (acute malnutrition). - A child may have low weight-for-age simply because they are short, not necessarily acutely malnourished. - Used for overall growth monitoring but not the most reliable for specifically assessing acute malnutrition. *Height-for-age* - **Height-for-age** indicates **chronic malnutrition or stunting**, reflecting long-term nutritional deprivation. - It is a measure of **linear growth faltering** and past nutritional status. - Does not reflect **current or acute nutritional status**, making it less useful for detecting recent malnutrition. *Mid-upper arm circumference* - **MUAC** is useful for **screening acute malnutrition** in children aged **6-59 months**, particularly in field settings. - Has **limited utility in infants under 6 months** and is less sensitive than weight-for-length in this age group. - Best used as a **rapid screening tool** rather than a diagnostic indicator for infants.

Question 396: What is the recommended first food for a 6-month-old infant?

A. Whole cow's milk
B. Honey
C. Iron-fortified cereal (Correct Answer)
D. Fruit juice

Explanation: ***Iron-fortified cereal*** - **Iron-fortified single-grain cereals** (like rice or oatmeal) are recommended as a first food for 6-month-old infants due to their easily digestible nature and the importance of **iron supplementation** at this age. - At 6 months, an infant's **iron stores begin to deplete**, and iron from complementary foods becomes crucial for development. *Whole cow's milk* - **Whole cow's milk** is not recommended for infants under 12 months as a primary beverage because it can interfere with **iron absorption** and may lead to **gastrointestinal bleeding**. - It also has a high protein and mineral content that can stress an infant's **developing kidneys**. *Honey* - **Honey** should not be given to infants under 12 months due to the risk of **infant botulism**, a rare but serious form of food poisoning. - The spores of *Clostridium botulinum* found in honey can germinate in an infant's immature digestive system. *Fruit juice* - **Fruit juice** offers no nutritional benefits over whole fruit and is not recommended for infants under 1 year of age. - Its high sugar content can contribute to **dental caries** and may lead to **diarrhea** or excessive weight gain.

Question 397: Which vitamin deficiency is most commonly associated with rickets in children?

A. Vitamin A
B. Vitamin C
C. Vitamin D (Correct Answer)
D. Vitamin K

Explanation: ***Vitamin D*** - **Vitamin D** plays a crucial role in the absorption of **calcium** and **phosphate**, which are essential for proper **bone mineralization**. - A deficiency leads to impaired mineralization of newly formed bone matrix, resulting in soft, weak bones characteristic of **rickets** in children and **osteomalacia** in adults. *Vitamin A* - **Vitamin A** is primarily involved in **vision**, immune function, and cell growth and differentiation. - While essential for health, its deficiency is not directly linked to the skeletal deformities seen in rickets. *Vitamin C* - **Vitamin C** is vital for **collagen synthesis**, a key component of connective tissues, skin, and bone matrix. - Its deficiency causes **scurvy**, characterized by bleeding gums, poor wound healing, and joint pain, not the bone deformities of rickets. *Vitamin K* - **Vitamin K** is essential for **blood coagulation** and plays a role in bone metabolism through the carboxylation of certain bone proteins like **osteocalcin**. - However, its deficiency primarily leads to bleeding disorders and does not cause rickets.

Question 398: What is the capacity of stomach at birth?

A. 5 ml
B. 25 ml
C. 50 ml (Correct Answer)
D. 100 ml

Explanation: ***50 ml*** - The **stomach capacity** of a full-term newborn baby is approximately **50 ml**. - This small capacity is why newborns feed frequently, as their stomachs can only hold a limited amount of milk at each feeding. *5 ml* - A capacity of 5 ml is far too small for a newborn baby and would not allow for adequate feeding and nutrition. - This volume is closer to what might be seen in very premature infants or for medication dosages, not total stomach capacity. *25 ml* - While 25 ml is a small volume, it is still significantly less than the typical **stomach capacity** of a healthy, full-term newborn. - A stomach of this size would necessitate even more frequent feedings than usually observed. *100 ml* - A stomach capacity of 100 ml at birth is too large for a typical newborn. - This volume is more characteristic of an infant several weeks to a few months old, as the stomach expands rapidly during the first few weeks of life.

Question 399: All of the following are true regarding breast milk as compared to cow's milk except

A. Contains more lactose
B. More amount of proteins (Correct Answer)
C. Minerals and salts are less
D. Less amount of fat content

Explanation: ***More amount of proteins*** - Breast milk actually contains a **lower concentration of protein** (1.0-1.3 g/100mL) compared to cow's milk (3.3 g/100mL), making this statement **FALSE**. - Cow's milk has nearly **3 times more protein** than breast milk, which is appropriate for a calf's rapid growth but excessive for human infants. - The type of protein in breast milk (60% whey, 40% casein) is also **easier for infants to digest** than the casein-dominant proteins (80% casein) in cow's milk. *Contains more lactose* - Breast milk has a **higher lactose content** (~7 g/100mL) than cow's milk (~4.8 g/100mL). - This higher lactose level is crucial for energy provision, calcium absorption, and development of the infant's central nervous system. *Less amount of fat content* - The **fat content is generally similar** between breast milk (3.5-4.5 g/100mL) and cow's milk (3.5-3.9 g/100mL). - However, breast milk fat is **more digestible** due to the presence of lipase enzyme and differs in fatty acid composition (more long-chain polyunsaturated fatty acids like DHA and ARA). - The fat content in breast milk varies significantly during a feed (foremilk vs hindmilk) and throughout lactation. *Minerals and salts are less* - Breast milk contains **lower amounts of minerals and salts** (sodium, potassium, calcium, phosphorus) than cow's milk. - This lower mineral content (renal solute load of 93 mOsm/L vs 221 mOsm/L in cow's milk) is beneficial for an infant's immature kidneys, preventing electrolyte imbalances and dehydration.

Question 400: Which of the following statements about hormone levels in a malnourished child is true?

A. Increased insulin levels
B. Decreased cortisol levels
C. Increased thyroid hormone levels
D. Increased growth hormone levels (Correct Answer)

Explanation: ***Increased growth hormone levels*** - In malnutrition, there is often an **increase in growth hormone (GH) levels** as the body attempts to mobilize energy stores and promote growth in a nutrient-depleted state. - This increased GH, however, often exists in a state of **GH resistance** due to low Insulin-like Growth Factor 1 (IGF-1) levels, meaning its effects on growth and anabolism are impaired. *Increased insulin levels* - **Insulin levels typically decrease** in malnutrition, particularly in protein-energy malnutrition, as the body aims to conserve glucose for vital organs and shift to fat and protein catabolism for energy. - Reduced caloric intake and decreased muscle mass lead to lower insulin sensitivity and production. *Decreased cortisol levels* - **Cortisol levels tend to be elevated** in malnourished children, especially in severe forms like kwashiorkor and marasmus. - This increase is part of the body's stress response, promoting **gluconeogenesis** and protein breakdown to provide energy substrates in the absence of adequate dietary intake. *Increased thyroid hormone levels* - **Thyroid hormone levels (T3 and T4) typically decrease** in malnutrition as an adaptive response to conserve energy. - This state of "sick euthyroid syndrome" or "low T3 syndrome" helps reduce metabolic rate and preserve energy stores during periods of nutritional deprivation.

Practice by Chapter

Breastfeeding

Practice Questions

Infant Formula Feeding

Practice Questions

Complementary Feeding

Practice Questions

Nutritional Requirements by Age

Practice Questions

Malnutrition and Failure to Thrive

Practice Questions

Obesity in Children

Practice Questions

Vitamin Deficiencies

Practice Questions

Mineral Deficiencies

Practice Questions

Food Allergies and Intolerances

Practice Questions

Nutritional Management of Chronic Diseases

Practice Questions

Eating Disorders

Practice Questions

Parenteral and Enteral Nutrition

Practice Questions

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