Pediatric Nutrition Practice Questions

Q: What is the primary method for the prevention of neural tube defects in newborns?

Folic acid. **Explanation:** **Why Folic Acid is Correct:** Folic acid (Vitamin B9) is essential for DNA synthesis and methylation processes. During the first 28 days of gestation—often before a woman knows she is pregnant—the neural tube closes. A deficiency in folate impairs rapid cell division and tissue remodeling, leading to failure of the neural tube to fuse. This results in defects such as **Anencephaly** or **Spina Bifida**. Supplementation significantly reduces the incidence of these defects by ensuring adequate folate levels during this critical embryological window. **Why Other Options are Incorrect:** * **Iron:** Essential for preventing maternal anemia and ensuring fetal oxygenation, but it plays no role in the structural formation of the neural tube. * **Vitamin B6 (Pyridoxine):** Primarily used in pregnancy to manage nausea and vomiting (morning sickness); it does not prevent structural CNS defects. * **Vitamin B12 (Cobalamin):** While B12 deficiency can technically impair folate metabolism (the "folate trap"), it is not the primary clinical intervention used for the prevention of NTDs. **High-Yield Clinical Pearls for NEET-PG:** * **Ideal Timing:** Supplementation must begin **pre-conceptionally** (at least 1 month before) and continue through the first trimester. * **Standard Dose:** 400 mcg (0.4 mg) daily for low-risk pregnancies. * **High-Risk Dose:** 4 mg (4000 mcg) daily for women with a previous history of a child with NTD or those on anti-epileptic drugs (e.g., Valproate). * **Screening:** Elevated **Alpha-fetoprotein (AFP)** in maternal serum or amniotic fluid is a biochemical marker for open NTDs.

Q: A child complains of episodes of abdominal distension, bloating, and diarrhea upon intake of milk and milk products. Which of the following can be given to that child?

Yogurt. ### Explanation The clinical presentation of abdominal distension, bloating, and diarrhea following milk consumption is characteristic of **Lactose Intolerance**. This condition results from a deficiency of the enzyme **lactase** (brush border disaccharidase), leading to the malabsorption of lactose, which is then fermented by colonic bacteria into organic acids and gas. **Why Yogurt is the Correct Answer:** Yogurt is well-tolerated by individuals with lactose intolerance due to two primary reasons: 1. **Bacterial Lactase:** The starter cultures used in yogurt (e.g., *Lactobacillus bulgaricus* and *Streptococcus thermophilus*) produce endogenous lactase, which helps digest lactose within the intestine. 2. **Semi-solid Consistency:** The thicker consistency of yogurt slows gastric emptying, allowing the limited amount of native intestinal lactase more time to act on the remaining lactose. **Why Other Options are Incorrect:** * **Ice Cream (A):** Contains high amounts of lactose and fat, which can exacerbate osmotic diarrhea and bloating. * **Skimmed Milk (B):** Removing fat does not remove lactose. In fact, skimmed milk often has a slightly higher lactose concentration by volume than whole milk. * **Cold Milk (C):** Temperature does not alter lactose content. Cold milk may actually increase intestinal motility in some individuals, worsening symptoms. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** The **Hydrogen Breath Test** is the non-invasive gold standard. A stool acidity test (pH < 5.5) and the presence of reducing sugars are common bedside findings. * **Secondary Lactose Intolerance:** Frequently occurs post-gastroenteritis (e.g., Rotavirus) due to the sloughing of the intestinal villi tips where lactase is located. * **Management:** Encourage fermented dairy (yogurt, aged cheese) and exogenous lactase enzyme substitutes. Avoid complete dairy restriction to prevent Vitamin D and Calcium deficiency.

Q: One of the following is not reported to be a clinical manifestation of Zinc deficiency in children?

Macrocytic anaemia. **Explanation:** Zinc is an essential trace element required for the function of over 300 enzymes, including those involved in DNA synthesis, cell division, and protein metabolism. **Why Macrocytic Anaemia is the Correct Answer:** Zinc deficiency is **not** associated with macrocytic anaemia. Macrocytic anaemia is typically caused by deficiencies in Vitamin B12 or Folic acid. In contrast, zinc deficiency is more closely linked to impaired growth and immune dysfunction. While severe zinc deficiency can sometimes coexist with iron deficiency (leading to microcytic anaemia) in malabsorption syndromes, it does not independently cause macrocytic changes. **Analysis of Incorrect Options:** * **Dwarfism and Hypogonadism:** These are classic features of chronic zinc deficiency, famously described in the "Prasad syndrome." Zinc is vital for the growth hormone-IGF-1 axis and gonadal development. * **Liver and Spleen Enlargement:** Hepatosplenomegaly is a documented clinical finding in children with chronic zinc deficiency, often seen alongside growth retardation and geophagia (clay eating). * **Impaired Cell-Mediated Immunity:** Zinc is crucial for T-lymphocyte function and thymic hormone activity. Deficiency leads to lymphopenia, thymic atrophy, and increased susceptibility to infections (e.g., pneumonia and diarrhea). **High-Yield Clinical Pearls for NEET-PG:** * **Acrodermatitis Enteropathica:** An autosomal recessive disorder of zinc absorption characterized by the triad of **alopecia, diarrhea, and vesiculobullous dermatitis** (periorificial and acral). * **WHO Recommendation:** Zinc supplementation (20 mg/day for 10-14 days) is standard management for pediatric **diarrhea** to reduce severity and recurrence. * **Other signs:** Hypogeusia (decreased taste), impaired wound healing, and night blindness (zinc is a cofactor for Retinol dehydrogenase).

Q: Craniotabes in children is commonly associated with which vitamin deficiency?

Vitamin D. **Explanation:** **Craniotabes** refers to the softening and thinning of the skull bones, typically the occipital and parietal bones. When pressure is applied, the bone yields with a sensation similar to pressing on a ping-pong ball. 1. **Why Vitamin D is Correct:** Craniotabes is one of the earliest clinical signs of **Nutritional Rickets** (Vitamin D deficiency). Vitamin D is essential for calcium and phosphorus absorption; its deficiency leads to defective mineralization of the osteoid matrix. In infants, this results in the softening of the skull bones. While it can be a physiological finding in newborns, its persistence or appearance after the neonatal period strongly suggests Rickets. 2. **Why Other Options are Incorrect:** * **Vitamin A:** Deficiency primarily affects the eyes (Xerophthalmia, Bitot’s spots) and epithelial integrity, not bone mineralization. * **Vitamin E:** Deficiency leads to hemolytic anemia (especially in preterms) and neurological symptoms like ataxia, but does not cause bone softening. * **Vitamin C:** Deficiency causes **Scurvy**. While Scurvy affects bones (subperiosteal hemorrhage, Scorbutic rosary), it is characterized by bone fragility and painful joints rather than the "ping-pong" softening seen in Craniotabes. **High-Yield Clinical Pearls for NEET-PG:** * **Earliest sign of Rickets:** Craniotabes (usually appears at 3–6 months). * **Earliest radiological sign of Rickets:** Cupping and splaying of the distal ends of long bones (best seen at the wrist/lower end of radius and ulna). * **Rachitic Rosary:** Palpable enlargement of costochondral junctions (rounded/blunt), whereas **Scorbutic Rosary** is sharp and angular (due to subluxation of the sternum). * **Harrison’s Sulcus:** A horizontal groove along the lower border of the thorax corresponding to the insertion of the diaphragm, seen in chronic Rickets.

Q: What is the caloric supplementation required per kilogram of body weight for a severely malnourished child?

175 cal/kg. ### Explanation The management of Severe Acute Malnutrition (SAM) is a high-yield topic for NEET-PG, focusing on the WHO protocols for stabilization and rehabilitation. **Why 175 cal/kg is correct:** The nutritional rehabilitation of a severely malnourished child is divided into two main phases: 1. **Stabilization Phase (Initial):** Focuses on treating life-threatening complications (hypoglycemia, hypothermia, infection). Caloric intake is kept low (**80–100 kcal/kg/day**) to prevent **Refeeding Syndrome**. 2. **Rehabilitation Phase (Catch-up growth):** Once the child’s appetite returns and edema subsides, the goal shifts to rapid weight gain. During this phase, the caloric requirement increases significantly to **150–220 kcal/kg/day**, with **175 kcal/kg/day** being the standard recommended target to achieve catch-up growth. **Analysis of Incorrect Options:** * **A (100 cal/kg):** This is the caloric limit for the **Stabilization Phase** (F-75 diet). Exceeding this early on can lead to metabolic collapse. * **B (125 cal/kg):** This is an intermediate value and is insufficient for the rapid catch-up growth required in the rehabilitation phase of SAM. * **C (150 cal/kg):** While 150 kcal/kg is the lower limit of the rehabilitation range, 175 kcal/kg is the more specific, classically tested "target" value in standard pediatric textbooks (like Ghai Pediatrics). **Clinical Pearls for NEET-PG:** * **Protein Requirement:** In the rehabilitation phase, protein intake should be **4–6 g/kg/day**. * **F-75 vs. F-100:** F-75 (75 kcal/100ml) is used in the stabilization phase, while F-100 (100 kcal/100ml) is used in the rehabilitation phase. * **Target Weight Gain:** Good progress in the rehabilitation phase is defined as a weight gain of **>10 g/kg/day**.

Q: What is the recommended dose of zinc for a 9-month-old infant experiencing acute diarrhea?

20 mg daily. **Explanation:** The management of acute diarrhea in children involves Oral Rehydration Therapy (ORT) and **Zinc supplementation**. Zinc is crucial as it reduces the duration and severity of the diarrheal episode and prevents subsequent episodes for the following 2–3 months by improving intestinal mucosal integrity and local immunity. **Why Option C is Correct:** According to the **WHO and UNICEF guidelines** (also followed by the Integrated Management of Neonatal and Childhood Illness - IMNCI), the dosage of elemental zinc is age-dependent: * **Infants < 6 months:** 10 mg elemental zinc once daily for 14 days. * **Children ≥ 6 months:** **20 mg elemental zinc** once daily for 14 days. Since the infant in the question is 9 months old, the correct dose is 20 mg. **Analysis of Incorrect Options:** * **Option A (5 mg):** This is sub-therapeutic and is not a standard recommendation for any pediatric age group in acute diarrhea. * **Option B (10 mg):** This is the correct dose for infants **younger than 6 months**. * **Option D (25 mg):** This exceeds the standard recommended dose for pediatric diarrheal management. **High-Yield Clinical Pearls for NEET-PG:** * **Duration:** Zinc must be continued for **14 days**, even if the diarrhea stops earlier, to replenish body stores. * **Mechanism:** Zinc acts as an immunomodulator and a cofactor for over 300 enzymes; it specifically inhibits the cAMP-induced chloride secretion in the gut. * **Formulations:** Usually administered as Zinc Sulfate, Gluconate, or Acetate. * **ORS + Zinc:** This combination is considered the "Gold Standard" for reducing under-5 mortality due to diarrheal diseases.

Q: Painful pseudoparalysis in an infant is suggestive of which vitamin deficiency?

Vitamin C deficiency. **Explanation:** **Vitamin C deficiency (Scurvy)** is the correct answer. In infants, scurvy typically manifests between 6 and 24 months of age. The hallmark of infantile scurvy is **subperiosteal hemorrhage**, most commonly involving the femur and tibia. These hemorrhages are exquisitely painful, leading the infant to keep their limbs still to avoid pain—a clinical state known as **pseudoparalysis**. The infant often assumes a "frog-leg position" (flexed and abducted hips/knees) and may cry intensely when handled or changed. **Why other options are incorrect:** * **Vitamin A deficiency:** Primarily presents with ocular signs (Bitot spots, xerophthalmia, night blindness) and follicular hyperkeratosis, not bone pain or pseudoparalysis. * **Vitamin B6 (Pyridoxine) deficiency:** In infants, this typically presents with intractable seizures (pyridoxine-dependent epilepsy), irritability, and cheilosis. * **Vitamin E deficiency:** Leads to hemolytic anemia (especially in preterms) and neurological symptoms like ataxia and loss of deep tendon reflexes, but not painful bone lesions. **NEET-PG High-Yield Pearls for Scurvy:** * **Clinical Signs:** "Frog-leg" position, Scorbutic rosary (sharp angulation at costochondral junctions), and gingival hemorrhages (only if teeth have erupted). * **Radiological Signs:** * **Frankel’s Line:** Dense zone of provisional calcification. * **Wimberger’s Ring Sign:** Sclerotic ring around a lucent epiphysis. * **Trummerfeld Zone:** Lucent "scurvy line" proximal to the dense zone. * **Pelkan Spur:** Lateral bony outgrowths. * **Differential Diagnosis:** Must be distinguished from **Rickets** (painless swelling) and **Osteomyelitis** (fever and localized inflammation).

Question 1

What is the primary method for the prevention of neural tube defects in newborns?

Accepted Answer

Folic acid

Answer

Iron

Answer

Vitamin B6

Answer

Vitamin B12

Question 2

A child complains of episodes of abdominal distension, bloating, and diarrhea upon intake of milk and milk products. Which of the following can be given to that child?

Accepted Answer

Yogurt

Answer

Ice cream

Answer

Skimmed milk

Answer

Cold milk

Question 3

One of the following is not reported to be a clinical manifestation of Zinc deficiency in children?

Accepted Answer

Macrocytic anaemia

Answer

Dwarfism and hypogonadism

Answer

Liver and spleen enlargement

Answer

Impaired cell–mediated immunity

Question 4

Craniotabes in children is commonly associated with which vitamin deficiency?

Accepted Answer

Vitamin D

Answer

Vitamin A

Answer

Vitamin E

Answer

Vitamin C

Question 5

What is the caloric supplementation required per kilogram of body weight for a severely malnourished child?

Accepted Answer

175 cal/kg

Answer

100 cal/kg

Answer

125 cal/kg

Answer

150 cal/kg

Question 6

What is true about breastfeeding?

Accepted Answer

It is best for both preterm and term infants.

Answer

About 50% of the energy is derived from protein.

Answer

It should be avoided for a day after a caesarean section.

Answer

It predisposes to necrotising enterocolitis.

Question 7

What is the recommended dose of zinc for a 9-month-old infant experiencing acute diarrhea?

Accepted Answer

20 mg daily

Answer

5 mg daily

Answer

10 mg daily

Answer

25 mg daily

Question 8

The protective effects of breast milk are known to be associated with which of the following?

Accepted Answer

IgA antibodies

Answer

IgM antibodies

Answer

Lysozyme

Answer

Mast cells

Question 9

All of the following statements regarding a child with hypernatremic dehydration are true EXCEPT?

Accepted Answer

Rapid rehydration is indicated

Answer

There is at least a 10 percent fluid deficit

Answer

Muscle tone is increased

Answer

The sensorium fluctuates between lethargy and hyperirritability

Question 10

Painful pseudoparalysis in an infant is suggestive of which vitamin deficiency?

Accepted Answer

Vitamin C deficiency

Answer

Vitamin A deficiency

Answer

Vitamin B6 deficiency

Answer

Vitamin E deficiency

Pediatric Nutrition — MCQs

Pediatric Nutrition — MCQs

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