Neonatology Practice Questions

Q: According to neonatal resuscitation protocol, how much oxygen to give in a term neonate with apnea and bradycardia initially?

21%. ***21%*** - According to **NRP (Neonatal Resuscitation Program) 2020 guidelines**, for **term neonates (≥35 weeks gestation)** requiring resuscitation, the initial recommendation is to use **room air (21% oxygen)** to minimize the risk of hyperoxia and oxidative injury. - Multiple randomized controlled trials have demonstrated that room air is as effective as 100% oxygen for initial resuscitation. - Supplemental oxygen is only added if **oxygen saturation targets** are not met despite adequate ventilation, and should be titrated using **pulse oximetry**. *30%* - This concentration is **higher than room air** and is not the initial recommendation for term neonates needing resuscitation. - Starting with a higher oxygen concentration can lead to **oxidative stress** without immediate benefit. - Higher initial concentrations (21-30%) are reserved for **preterm neonates (<35 weeks)**. *100%* - Administering **100% oxygen** can be harmful to a neonate, potentially causing **oxidative injury** to developing organs, including the lungs, brain, and retina. - This was the old practice but has been **discontinued** based on evidence showing increased mortality and morbidity. - High concentrations are no longer recommended even in severe cases; oxygen should be titrated to saturation targets. *50%* - While lower than 100%, 50% oxygen is still **not the initial recommended concentration** for term neonates in resuscitation protocols. - The goal is to start with **21% oxygen** and gradually increase based on **pulse oximetry monitoring** and target saturation ranges if 21% is insufficient.

Q: Which of the following is the most common cause of early-onset neonatal sepsis?

Group B Streptococcus. ***Group B Streptococcus*** - **Group B Streptococcus (GBS)**, or *Streptococcus agalactiae*, is the **most common bacterial cause of early-onset neonatal sepsis** (within the first 7 days of life) in many populations. - Transmission typically occurs vertically from the mother's vaginal flora during birth. - **Intrapartum antibiotic prophylaxis** in GBS-positive mothers has significantly reduced incidence in developed countries. *Escherichia coli* - **E. coli** is the **second most common cause of early-onset sepsis** and the **leading cause in preterm and very low birth weight infants**. - Can be transmitted from the maternal genital tract during delivery. - Associated with higher mortality rates than GBS, particularly in preterm neonates. *Listeria monocytogenes* - While *Listeria monocytogenes* can cause **neonatal sepsis and meningitis**, it is far less common than GBS or E. coli. - Associated with maternofetal transmission from **foodborne infection** in the mother. - Can cause early or late-onset disease. *Klebsiella pneumoniae* - *Klebsiella pneumoniae* is more commonly associated with **late-onset neonatal sepsis**, particularly in **premature or critically ill neonates** in NICU settings. - Often associated with **hospital-acquired infections** and invasive procedures. - In some regions, particularly in developing countries, it can also cause early-onset disease.

Q: Within how many hours should breastfeeding be initiated in a perfectly healthy child with no anatomical problems?

A. 1 hour. ***A. 1 hour*** - The World Health Organization (WHO) and UNICEF recommend initiating **breastfeeding within the first hour of birth** for healthy newborns. - Early initiation helps establish **successful breastfeeding**, promotes **maternal-infant bonding**, and facilitates the transfer of **colostrum**, which is rich in antibodies. *B. 4 hrs* - While better than much later initiation, waiting **4 hours** still misses the critical window of the first hour when the infant is often most alert and ready to feed. - This delay can reduce the likelihood of optimal breastfeeding outcomes. *C. 24 hrs* - Delaying breastfeeding for **24 hours** after birth can negatively impact the establishment of breastfeeding and deprive the newborn of early colostrum benefits. - This timeframe is significantly longer than the recommended period for initial feeding in a healthy infant. *D. 48 hrs* - Initiating breastfeeding after **48 hours** is considered a significant delay and is generally associated with difficulties in establishing breastfeeding and reduced breastfeeding duration. - By this point, the infant may be less receptive, and the mother's milk supply may not be as effectively stimulated.

Q: Which of the following is a common cause of late-onset jaundice in newborns?

Breast milk jaundice. ***Breast milk jaundice*** - This condition typically presents with **unconjugated hyperbilirubinemia** after the first 5-7 days of life, peaking at 2-3 weeks and potentially lasting for several weeks to months. - It is thought to be related to substances in breast milk (such as beta-glucuronidase and pregnane-3α,20β-diol) that **enhance enterohepatic circulation of bilirubin** and may inhibit hepatic conjugation of bilirubin. - This is a **late-onset jaundice** and a diagnosis of exclusion after ruling out pathological causes. *Hemolytic disease of the newborn* - This is an **early-onset jaundice**, usually appearing within the first 24 hours of life due to rapid breakdown of red blood cells. - It is typically caused by **ABO or Rh incompatibility** between mother and fetus, leading to significant and often severe hyperbilirubinemia. - Not a cause of late-onset jaundice. *Gilbert syndrome* - While it causes **unconjugated hyperbilirubinemia**, it is an inherited disorder that usually presents later in life, often in adolescence or adulthood, particularly during periods of stress or fasting. - It results from a mild deficiency in UDP-glucuronyltransferase (UGT1A1) activity, not typically a cause of jaundice in the newborn period. *Physiologic jaundice* - This is a very common and normal type of jaundice that appears after 24 hours of life, peaks on days 3-5, and typically resolves within 7-10 days in full-term infants. - It is due to the newborn's immature liver and increased red blood cell turnover, but it is **not late-onset** as it appears and resolves within the first week.

Q: What is the appropriate management protocol for a neonate who has meconium aspiration and does not initiate breathing after initial resuscitation steps including drying, stimulation, and repositioning?

Continue resuscitation with bag and mask ventilation. ***Continue resuscitation with bag and mask ventilation*** - For a neonate with **meconium aspiration** who does not initiate breathing after initial attempts, the priority is to establish effective **ventilation** using a bag and mask. - This ensures adequate **oxygenation and ventilation** until the neonate can breathe independently or further interventions are necessary. *Immediate endotracheal intubation and suctioning* - **Routine intubation and tracheal suctioning** for non-vigorous neonates with meconium-stained amniotic fluid are **no longer recommended** by current guidelines. - Initial steps should focus on providing **positive pressure ventilation (PPV)** for infants who are not breathing or are gasping. *Administer surfactant therapy* - **Surfactant therapy** is used to treat **respiratory distress syndrome** or severe meconium aspiration syndrome once ventilation is established. - It is not an initial step for a neonate who has **not initiated breathing** and requires immediate resuscitation. *Start chest compressions immediately* - **Chest compressions** are indicated only if the **heart rate remains below 60 BPM**, despite adequate ventilation with 100% oxygen for **at least 30 seconds**. - Initiating compressions before confirming adequate ventilation and heart rate assessment is **premature and inappropriate**.

Q: A neonate develops a respiratory infection shortly after birth, and the nasopharyngeal swab is positive for Respiratory Syncytial Virus (RSV) antigen. Which treatment is the most appropriate?

Supportive care. ***Supportive care*** - For most infants and neonates with RSV infection, **supportive care** is the mainstay of treatment, including **oxygen therapy**, nasal suctioning, and hydration. - **Ribavirin** (the only antiviral with activity against RSV) is rarely used due to limited efficacy, high cost, and potential toxicity; it may be considered only in **severe cases in immunocompromised patients**. - **Palivizumab** is a monoclonal antibody used for **prophylaxis** in high-risk infants, not for treatment of active infection. *Oseltamivir* - **Oseltamivir** is an antiviral drug primarily used for the treatment and prophylaxis of **influenza A and B viruses**. - It is **not effective** against **Respiratory Syncytial Virus (RSV)**. *Amantadine* - **Amantadine** is an antiviral medicine specifically used to treat and prevent **influenza A virus infections**. - It has **no antiviral activity** against **RSV** or other respiratory viruses. *Acyclovir* - **Acyclovir** is an antiviral drug indicated for the treatment of infections caused by **herpes simplex virus (HSV)** and **varicella-zoster virus (VZV)**. - It has **no role** in the management of **RSV infection**.

Q: A 6-week-old infant presents with projectile, non-bilious vomiting after feeds and poor weight gain. On examination, the infant appears eager to feed and has visible gastric peristalsis. What is the most likely diagnosis?

Pyloric stenosis. ***Pyloric stenosis*** - This condition is characterized by **projectile, non-bilious vomiting** in young infants, classically presenting between **2-8 weeks of age**. - **Visible gastric peristalsis** (peristaltic waves moving from left to right across the upper abdomen) is a pathognomonic sign. - The infant appears **eager to feed** after vomiting, distinguishing it from other causes where the infant is typically lethargic and refuses feeds. - An **olive-shaped mass** may be palpable in the right upper quadrant (hypertrophied pylorus). *Intussusception* - While it can manifest with vomiting and poor feeding, **intussusception** typically presents with sudden onset of **severe, crampy abdominal pain** (drawing legs up, inconsolable crying) and **currant jelly stools**. - The peak incidence is between **6-36 months**, making it less likely in a 6-week-old infant. - Vomiting may be bilious, and lethargy occurs later as a sign of shock. *Hirschsprung disease* - This condition primarily presents with **delayed passage of meconium** (beyond 48 hours) in neonates and chronic **constipation** with **abdominal distension**. - Vomiting, when present, is typically **bilious** due to intestinal obstruction. - Not associated with projectile, non-bilious vomiting or visible peristalsis. *Necrotizing enterocolitis* - **Necrotizing enterocolitis (NEC)** is predominantly a disease of **premature infants**, especially those with very low birth weight. - Key features include **bilious vomiting**, **bloody stools**, **abdominal distension**, and signs of **sepsis** (temperature instability, apnea, lethargy). - Very rare in healthy, full-term infants at this age.

Q: An infant born at 35 weeks of gestation develops grunting, nasal flaring, and cyanosis shortly after birth. What is the most likely diagnosis?

Respiratory distress syndrome. ***Respiratory distress syndrome*** - This condition is characterized by **respiratory distress** (grunting, nasal flaring, cyanosis) shortly after birth in a **premature infant** (35 weeks gestation) due to pulmonary **surfactant deficiency**. - **Surfactant deficiency** leads to alveolar collapse, decreased lung compliance, and impaired gas exchange. *Neonatal pneumonia* - While pneumonia can cause similar respiratory symptoms, it is less likely to appear **immediately after birth** in a premature infant without other signs of infection (e.g., fever, sepsis). - Diagnosis typically requires evidence of infection, such as abnormal chest X-ray findings with **infiltrates** and **leukocytosis**. *Transient tachypnea of the newborn* - This condition usually presents with **tachypnea** and mild respiratory distress, but it is typically **self-limiting** and resolves within 24-48 hours. - It is more common in **term or late preterm infants** delivered by C-section and is due to delayed clearance of fetal lung fluid, not surfactant deficiency. *Congenital heart disease* - While congenital heart disease can cause cyanosis and respiratory distress, the onset is often not **immediately after birth** and would typically be accompanied by other signs like heart murmurs or abnormal peripheral pulses. - The primary respiratory findings (grunting, nasal flaring) are more indicative of a **pulmonary issue** rather than a cardiac one, though severe cardiac issues can present this way.

Q: A neonate develops severe jaundice and hepatosplenomegaly shortly after birth. Laboratory tests reveal elevated IgM antibodies against Toxoplasma gondii. What is the most likely route of transmission?

Vertical transmission from mother. ***Vertical transmission from mother*** - The presence of **IgM antibodies** in a neonate indicates a **recent or active infection**, which is characteristic of congenital infections. - **Toxoplasma gondii** can be transmitted **transplacentally** from an infected mother to her fetus, leading to symptoms like jaundice and hepatosplenomegaly at birth. *Ingestion of contaminated water* - This route of transmission is typical for acquiring Toxoplasma gondii in older children or adults, usually through oocysts in contaminated water or food. - It would not explain the congenital presentation with immediate symptoms and specific IgM antibodies in a neonate shortly after birth. *Inhalation of oocysts* - While Toxoplasma gondii oocysts can be airborne, inhalation is a rare route of infection compared to ingestion, and certainly not the primary mode of congenital transmission. - This route would be more likely to cause symptoms in an individual with a compromised immune system in an environment with high oocyst load, not a neonate. *Vector-borne transmission* - Toxoplasma gondii is not transmitted by vectors (such as mosquitoes or ticks), but rather through ingestion of contaminated food/water or vertical transmission. - This route is incorrect for Toxoplasma and would not explain the congenital symptoms observed.

Question 1

According to neonatal resuscitation protocol, how much oxygen to give in a term neonate with apnea and bradycardia initially?

Accepted Answer

21%

Answer

100%

Answer

50%

Answer

30%

Question 2

Which of the following is the most common cause of early-onset neonatal sepsis?

Accepted Answer

Group B Streptococcus

Answer

Listeria monocytogenes

Answer

Klebsiella pneumoniae

Answer

Escherichia coli

Question 3

Within how many hours should breastfeeding be initiated in a perfectly healthy child with no anatomical problems?

Accepted Answer

A. 1 hour

Answer

C. 24 hrs

Answer

B. 4 hrs

Answer

D. 48 hrs

Question 4

Which of the following is a common cause of late-onset jaundice in newborns?

Accepted Answer

Breast milk jaundice

Answer

Hemolytic disease of the newborn

Answer

Gilbert syndrome

Answer

Physiologic jaundice

Question 5

What is the appropriate management protocol for a neonate who has meconium aspiration and does not initiate breathing after initial resuscitation steps including drying, stimulation, and repositioning?

Accepted Answer

Continue resuscitation with bag and mask ventilation

Answer

Immediate endotracheal intubation and suctioning

Answer

Administer surfactant therapy

Answer

Start chest compressions immediately

Question 6

A neonate develops a respiratory infection shortly after birth, and the nasopharyngeal swab is positive for Respiratory Syncytial Virus (RSV) antigen. Which treatment is the most appropriate?

Accepted Answer

Supportive care

Answer

Oseltamivir

Answer

Amantadine

Answer

Acyclovir

Question 7

A newborn exhibits poor feeding, a weak cry, and generalized muscle weakness from birth. There is no significant maternal medical history. What is the most likely diagnosis?

Accepted Answer

Genetic condition leading to muscle weakness

Answer

Infant botulism from spore ingestion

Answer

Autoimmune neuromuscular disorder

Answer

Perinatal asphyxia with hypoxic-ischemic encephalopathy

Question 8

A 6-week-old infant presents with projectile, non-bilious vomiting after feeds and poor weight gain. On examination, the infant appears eager to feed and has visible gastric peristalsis. What is the most likely diagnosis?

Accepted Answer

Pyloric stenosis

Answer

Intussusception

Answer

Hirschsprung disease

Answer

Necrotizing enterocolitis

Question 9

An infant born at 35 weeks of gestation develops grunting, nasal flaring, and cyanosis shortly after birth. What is the most likely diagnosis?

Accepted Answer

Respiratory distress syndrome

Answer

Neonatal pneumonia

Answer

Transient tachypnea of the newborn

Answer

Congenital heart disease

Question 10

A neonate develops severe jaundice and hepatosplenomegaly shortly after birth. Laboratory tests reveal elevated IgM antibodies against Toxoplasma gondii. What is the most likely route of transmission?

Accepted Answer

Vertical transmission from mother

Answer

Ingestion of contaminated water

Answer

Inhalation of oocysts

Answer

Vector-borne transmission

Neonatology — MCQs

Neonatology — MCQs

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