Question 1

A 8-year-old child presents with fever, irritability, and a widespread petechial rash that doesn't blanch with pressure. The child appears unwell and has neck stiffness. What is the most appropriate immediate management?

Accepted Answer

IV benzylpenicillin. ***IV benzylpenicillin***- The constellation of fever, irritability, widespread non-blanching petechial rash, unwell appearance, and neck stiffness is highly suggestive of **meningococcal disease** (meningitis with or without septicaemia), a medical emergency.- **Immediate empirical intravenous antibiotics**, such as **benzylpenicillin**, are critical to reduce mortality and morbidity in suspected meningococcal disease and should not be delayed by investigations. *Oral antibiotics*- The child presents with severe symptoms, including an **unwell appearance** and **non-blanching rash**, indicating a life-threatening infection requiring urgent intervention.- **Oral antibiotics** are inadequate for treating severe, rapidly progressing infections like meningococcal disease due to potentially slow absorption and insufficient blood-brain barrier penetration.*Lumbar puncture*- While a **lumbar puncture** is crucial for definitive diagnosis of meningitis, it must **not delay the immediate administration of IV antibiotics** in suspected meningococcal disease.- In a critically unwell child with signs of increased intracranial pressure (e.g., severe irritability, neck stiffness in context of severe illness), a lumbar puncture carries a risk of **herniation** and should be deferred until after antibiotics are given and/or a CT head rules out a space-occupying lesion.*Blood cultures*- **Blood cultures** are important for identifying the causative organism and guiding specific antibiotic therapy, but they should be taken **concurrently with or immediately after administering the first dose of IV antibiotics**.- Delaying antibiotic administration to obtain blood cultures can have severe consequences in a rapidly deteriorating patient with suspected **meningococcal septicaemia**.*CT head*- A **CT head** may be indicated to rule out complications like **cerebral edema** or **abscess** before a lumbar puncture, especially if there are signs of raised intracranial pressure.- However, like other investigations, a **CT head should not delay the immediate administration of life-saving IV antibiotics** in a child with suspected meningococcal disease, where time to treatment directly impacts prognosis. [Practice more Child Health questions on OnCourse]

Question 2

A 8-year-old child presents with fever, sore throat, and a sandpaper-like rash over the trunk and limbs. The tongue appears red with prominent papillae ("strawberry tongue"). What is the most likely diagnosis?

Accepted Answer

Scarlet fever. ***Scarlet fever***
  - The presentation of fever, sore throat (streptococcal pharyngitis), and a generalized fine papular, **sandpaper-like rash** is pathognomonic for scarlet fever.
  - The finding of a **strawberry tongue** (red, prominent papillae) is also highly characteristic, resulting from the systemic effects of circulating **pyrogenic exotoxins** produced by *Streptococcus pyogenes*.
*Viral exanthem*
  - While many **viral exanthems** cause fever and rash, they typically lack the characteristic fine, **sandpaper texture** or the associated severe pharyngitis.
  - The combination of sore throat, sandpaper rash, and specific **strawberry tongue** makes a common viral rash diagnosis highly unlikely.
*Kawasaki disease*
  - This disease presents with high fever unresponsive to antipyretics and signs like **bilateral non-exudative conjunctivitis**, cracked lips, and **cervical lymphadenopathy**.
  - The specific **sandpaper rash** and severe pharyngitis seen in the patient are not typical features of Kawasaki disease, which carries a risk of **coronary artery aneurysms**.
*Measles*
  - Measles is characterized by the prodrome of cough, coryza, and conjunctivitis, followed by a maculopapular rash that starts on the face and spreads downwards.
  - The presence of **Koplik spots** (small white spots on the buccal mucosa) precedes the rash in measles, and the rash appearance differs from the fine 'sandpaper' texture.
*Erythema infectiosum*
  - This disease (Fifth Disease, caused by **Parvovirus B19**) is clinically recognized by the initial **slapped cheek appearance**.
  - The rash then spreads to the extremities, developing a distinct **lacy, reticular pattern**, which contrasts sharply with the generalized, fine, sandpaper rash of scarlet fever. [Practice more Child Health questions on OnCourse]

Question 3

A 4-year-old child presents with fever, irritability, and neck stiffness. Lumbar puncture shows: opening pressure 25 cmH₂O, WCC 800/μL (90% neutrophils), protein 2.8 g/L, glucose 1.2 mmol/L (serum glucose 6.0 mmol/L). What is the most likely diagnosis?

Accepted Answer

Bacterial meningitis. ***Bacterial meningitis***- The constellation of **fever**, **neck stiffness**, severely elevated CSF **protein** (2.8 g/L), and profoundly low CSF **glucose** (ratio 0.2) is classic for acute bacterial infection.- The marked CSF pleocytosis (800/μL) with a predominant population of **neutrophils** (90%) indicates a rapidly progressive, pyogenic process.*Viral meningitis*- Characterized by **lymphocytic pleocytosis** (predominant lymphocytes) rather than the neutrophilic dominance seen here.- CSF glucose levels are typically **normal** or only mildly reduced, unlike the severe hypoglycemia reported in this patient.*Tuberculous meningitis*- While associated with low CSF glucose and high protein, it generally presents **subacutely** or chronically over weeks, not acutely.- CSF pleocytosis is usually **lymphocytic** or monocytic, not the acute neutrophilic predominance found in this sample.*Fungal meningitis*- This is rare in immunocompetent children, usually follows an indolent or **chronic** course, and typically presents with **lymphocytic** pleocytosis.- The acute presentation with fever, irritability, and prominent neutrophilia points strongly away from a fungal etiology.*Normal CSF*- Normal CSF findings include an opening pressure < 18 cmH₂O, WCC < 5/μL, and a CSF/serum glucose ratio > 0.6.- All measured parameters (pressure 25, WCC 800, glucose ratio 0.2) are significantly **abnormal**, definitively ruling out normal CSF. [Practice more Child Health questions on OnCourse]

Question 4

A 3-year-old child presents with a barking cough, inspiratory stridor, and hoarse voice. The symptoms are worse at night. The child is alert and playful. What is the most likely diagnosis?

Accepted Answer

Croup. ***Croup***
  - The presentation of a **barking cough**, **inspiratory stridor**, and **hoarse voice** in a 3-year-old is the classic triad for **Croup** (laryngotracheobronchitis), typically caused by the **Parainfluenza virus**.
  - Symptoms are typically worse at night due to increased **vagal tone** and decreased ambient humidity, yet the child remains alert and non-toxic, which is characteristic of mild-to-moderate croup.
*Epiglottitis*
  - This condition presents as a medical emergency with rapid onset of **high fever**, severe **dysphagia**, drooling, and a **muffled voice**, but usually lacks the characteristic **barking cough**.
  - The child with epiglottitis typically appears **toxic**, apprehensive, and prefers the **tripod position**, unlike the alert and playful child described.
*Bronchiolitis*
  - Bronchiolitis is an infection of the small airways, primarily causing **wheezing**, **tachypnea**, and signs of **lower respiratory distress**, usually without stridor or the specific barking cough.
  - It predominantly affects infants under 2 years of age and is most often caused by **Respiratory Syncytial Virus (RSV)**.
*Pneumonia*
  - This is an infection of the lung parenchyma, presenting with fever, **tachypnea**, and often a productive cough accompanied by focal findings like **crackles** or **dullness** on chest exam.
  - Pneumonia does not typically cause prominent **inspiratory stridor** or the characteristic **barking cough** associated with upper airway swelling.
*Foreign body aspiration*
  - This diagnosis usually involves a sudden onset of **choking** or coughing, and if the object is lodged in the larynx or trachea, it causes stridor, but the symptoms do not typically fluctuate and worsen specifically **at night**. [Practice more Child Health questions on OnCourse]

Question 5

A 2-year-old child presents with a 3-day history of cough, wheeze, and difficulty breathing. The symptoms started gradually and the child has been feeding poorly. On examination, there are widespread fine crackles and wheeze. What is the most likely diagnosis?

Accepted Answer

Bronchiolitis. ***Bronchiolitis***  
  - This diagnosis is strongly suggested by the patient's age (2 years), gradual onset of cough, wheeze, and difficulty breathing over 3 days, combined with **poor feeding** and widespread **fine crackles** and **wheeze** on examination, which are classic features of this viral lower respiratory tract infection.
  - It is the most common cause of lower respiratory tract infection in infants and young children, often caused by **Respiratory Syncytial Virus (RSV)**, leading to inflammation and obstruction of the small airways.
*Asthma*
  - While asthma presents with cough and wheeze, a first presentation in a 2-year-old with a 3-day gradual onset including **poor feeding** and widespread **fine crackles** is less typical, as asthma usually involves recurrent episodes or specific triggers.
  - The characteristic widespread fine crackles alongside wheeze, especially with a history of poor feeding and a clear acute illness, point away from asthma as the primary diagnosis in this context.
*Pneumonia*
  - Pneumonia usually presents with more localized findings (e.g., **dullness to percussion**, **bronchial breath sounds**), **coarse crackles**, and often higher fever or more significant systemic illness, differentiating it from the generalized wheeze and fine crackles of bronchiolitis.
  - The description of widespread wheeze is not a typical predominant finding in uncomplicated pneumonia in this age group.
*Croup*
  - Croup is characterized by a distinctive **barking cough** and **inspiratory stridor**, indicating upper airway obstruction, which are absent in the clinical presentation provided.
  - The widespread wheeze and fine crackles point to lower airway involvement, not the laryngeal and tracheal inflammation seen in croup.
*Foreign body aspiration*
  - Foreign body aspiration typically has a **sudden onset** of choking or coughing, which contrasts with the gradual 3-day history described.
  - While it can cause wheeze, it is often unilateral or localized and usually lacks the widespread **fine crackles** and history of poor feeding associated with a viral illness. [Practice more Child Health questions on OnCourse]

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