QCM : Pediatric Viral Exanthems and Their Management — 9 questions

Questions et réponses du QCM

1. What is measles exanthem?

A maculopapular, erythematous rash that begins on the face and spreads downward, characteristic of measles
A fine, sandpaper-like rash associated with scarlet fever
A lace-like rash that appears on the trunk and limbs in fifth disease
A widespread vesicular rash caused by herpes simplex virus

A maculopapular, erythematous rash that begins on the face and spreads downward, characteristic of measles

Explication

Measles exanthem is a maculopapular, erythematous rash that starts on the face and spreads cephalocaudally. It is characteristic of measles and often preceded by prodromal symptoms and Koplik spots. The other options describe different rashes: herpes simplex causes vesicles, scarlet fever causes a fine, sandpaper rash, and fifth disease causes a lace-like rash.

2. What is the primary characteristic feature of measles that appears on the buccal mucosa and is considered pathognomonic?

Koplik spots, small bluish-gray lesions with a red base
Maculopapular rash starting on the face
Petechial rash on the trunk
Vesicular lesions on the palate

Koplik spots, small bluish-gray lesions with a red base

Explication

Koplik spots are small, bluish-white lesions on the buccal mucosa, considered a hallmark for measles diagnosis. The other options describe different rash features not specific to measles.

3. How long does the rubella rash typically last?

Up to 14 days
Approximately 3 days
About 1 day
Around 7 days

Approximately 3 days

Explication

The rubella rash usually lasts about 3 days, which is a characteristic feature of the infection. The other durations are incorrect based on the typical course of rubella.

4. During which phase do the prodromal symptoms of measles typically occur, and how long do they last?

Prodromal phase with fever, cough, coryza, lasting 2-4 days
Post-exanthem phase lasting 1-2 days
Rash onset phase lasting 4-7 days
Convalescent phase with resolution of symptoms

Prodromal phase with fever, cough, coryza, lasting 2-4 days

Explication

Prodromal symptoms of measles, including fever, cough, coryza, last about 2-4 days before rash appears, helping in early diagnosis.

5. What is the role of the 'slapped cheek' rash in Fifth Disease?

It helps in diagnosing the disease by serving as a characteristic clinical feature.
It prevents the spread of the virus by forming a protective barrier.
It is a side effect of the immune response with no diagnostic significance.
It causes significant discomfort prompting patients to seek medical attention.

It helps in diagnosing the disease by serving as a characteristic clinical feature.

Explication

The 'slapped cheek' rash in Fifth Disease functions primarily as a diagnostic feature, helping clinicians identify the disease based on its characteristic appearance and timing.

6. Which characteristic of the measles exanthem helps in its spread on the skin?

Starts on the face and spreads cephalocaudally and centrifugally
Appears simultaneously on the face, trunk, and extremities
Begins as vesicles and then becomes maculopapular
Starts on the lower limbs and ascends upward

Starts on the face and spreads cephalocaudally and centrifugally

Explication

Measles rash begins on the face and spreads downward and outward, a pattern useful for clinical recognition and understanding its contagious spread.

7. Which complication is NOT commonly associated with measles infection?

Pneumonia
Encephalitis
Secondary bacterial infections
Hemolytic anemia

Hemolytic anemia

Explication

Hemolytic anemia is not a typical complication of measles; pneumonia, encephalitis, and secondary bacterial infections are known serious complications.

8. What preventive measure is most effective against measles?

Vaccination with MMR vaccine
Antiviral medication during early infection
Use of broad-spectrum antibiotics
Isolation after rash appears only

Vaccination with MMR vaccine

Explication

The MMR vaccine is the most effective preventive measure against measles, significantly reducing incidence when widely used.

9. What makes early recognition of measles important in public health?

To contain the outbreak and prevent severe complications
Because measles is never contagious before rash appears
Because it only affects hospitalized children
To differentiate from bacterial infections only

To contain the outbreak and prevent severe complications

Explication

Early recognition allows for containment measures and prevents severe complications, emphasizing the importance of clinical suspicion.

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Measles exanthem — key feature?

Maculopapular rash starting on face, spreading downward.

Measles — causative agent?

Measles virus.

Rubella rash — characteristic?

Faint, pink, lasts about 3 days, begins on face.

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