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Zorluk: OrtaPediatric Infectious Diseases

Congenital infections often present with distinct clinical syndromes in the neonatal period. Identify the correct causative pathogen for each of the described neonatal clinical presentations.

  • A newborn presents with sensorineural hearing loss, absent red reflexes bilaterally indicating cataracts, and a continuous machine-like murmur at the upper left sternal border.Rubella virus
  • An infant is evaluated for microcephaly and petechiae; cranial ultrasound reveals prominent periventricular calcifications.Cytomegalovirus
  • A neonate with macrocephaly is found to have severe chorioretinitis and diffuse, scattered intracranial calcifications throughout the brain parenchyma on imaging.Toxoplasma gondii
  • A 1-week-old neonate develops copious, clear nasal discharge and a desquamating maculopapular rash that distinctly involves the palms and soles.Treponema pallidum

Cevap

The presentations match as follows: Cataracts/Hearing loss/Murmur pairs with Rubella virus; Microcephaly/Periventricular calcifications pairs with Cytomegalovirus; Macrocephaly/Diffuse calcifications pairs with Toxoplasma gondii; Nasal discharge/Palmar rash pairs with Treponema pallidum.
Each neonatal presentation contains pathognomonic physical and imaging findings that uniquely identify the congenital pathogen, distinguishing them from other TORCH infections based on specific end-organ involvement.

Adım Adım Çözüm

1
Analyze the first clinical presentation featuring cataracts, hearing loss, and a continuous murmur.
Identified as the classic triad of congenital Rubella syndrome.
The continuous machine-like murmur represents a patent ductus arteriosus (PDA), which, alongside cataracts and deafness, is highly specific for Rubella.
2
Differentiate the two presentations involving intracranial calcifications.
Periventricular calcifications indicate Cytomegalovirus, whereas diffuse parenchymal calcifications indicate Toxoplasma gondii.
CMV tends to cause tissue damage and calcification immediately surrounding the ventricles, while Toxoplasmosis scattered calcifications throughout the brain parenchyma.
3
Evaluate the presentation featuring copious nasal discharge and a palmar/plantar rash.
Identified as early congenital syphilis caused by Treponema pallidum.
Snuffles (syphilitic rhinitis) and a copper-colored, desquamating maculopapular rash on the palms and soles are highly characteristic of congenital syphilis.

Anahtar Kavram

Differentiating congenital (TORCH) infections based on classic neonatal clinical triads and specific imaging findings.
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Pediatric Infectious Diseases

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