Correlate the following clinical descriptions of pediatric dermatologic findings and associated symptoms with their respective etiologic agents.
- An unvaccinated 4-year-old with a 3-day history of cough, severe runny nose, and conjunctival injection, who now developed a descending maculopapular exanthem starting at the hairline.Measles virus
- A 3-year-old who experienced a high-grade fever for three days that abruptly resolved, immediately followed by the appearance of a blanching maculopapular rash on the chest and back.Human herpesvirus 6
- A 6-year-old presenting with bright red cheeks, circumoral pallor, and a subsequent lacy, reticular erythematous eruption spreading over the arms and legs.Parvovirus B19
- A 5-year-old with a diffuse, finely papular, erythematous rash feeling like rough sandpaper, accompanied by prominent papillae on the tongue and exudative tonsillitis.Streptococcus pyogenes
Cevap
The presentations map respectively to Measles virus, Human herpesvirus 6, Parvovirus B19, and Streptococcus pyogenes.
Each pathogen produces a distinct and classic clinical syndrome. Measles virus causes rubeola, characterized by the 3 Cs and a descending rash. Human herpesvirus 6 causes roseola, marked by a fever that abruptly drops as a truncal rash emerges. Parvovirus B19 causes erythema infectiosum, noted for slapped cheeks and a reticular rash. Streptococcus pyogenes causes scarlet fever, recognized by pharyngitis, a sandpaper-like rash, and strawberry tongue.
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Anahtar Kavram
Recognition of classic pediatric viral and bacterial exanthems.