Match each neonatal clinical presentation (left) with the most likely causative pathogen and its appropriate diagnostic and management strategy (right).
- A term infant is born with intrauterine growth restriction, jaundice, and a petechial rash. Audiometry confirms bilateral sensorineural hearing loss. Neuroimaging shows calcifications localized specifically around the lateral ventricles.Cytomegalovirus; confirm with urine or saliva PCR; treat with oral valganciclovir or intravenous ganciclovir.
- A 5-week-old infant presents with poor feeding, hepatosplenomegaly, and copious blood-tinged purulent nasal discharge. A prominent copper-colored, scaling rash is noted on the palmar and plantar surfaces. Skeletal survey reveals metaphyseal lucencies.Treponema pallidum; confirm with paired maternal and infant serology; requires a 10-day course of intravenous aqueous crystalline penicillin G.
- A neonate is evaluated for increasing head circumference. Examination reveals bulging fontanelles and retinal lesions consistent with chorioretinitis. Non-contrast CT demonstrates multiple calcified nodules scattered throughout the cerebral cortex and basal ganglia.Toxoplasma gondii; confirm with infant IgM/IgA; treat with pyrimethamine, sulfadiazine, and leucovorin.
- An infant born to an unimmunized mother presents with a bounding peripheral pulse, a widened pulse pressure, and a continuous machinery murmur. Ophthalmic exam reveals bilateral lenticular opacities.Rubella virus; confirm via serology; management involves supportive care and targeted surgical interventions.
- A 14-day-old infant, born via prolonged vaginal delivery, presents with lethargy, poor feeding, and a new-onset focal motor seizure. Examination reveals three small vesicular lesions at the site of a prior fetal scalp electrode.Herpes simplex virus; confirm via surface swab and cerebrospinal fluid PCR; immediate empiric initiation of intravenous acyclovir.
Answer
The correct matches are: Vignette 1 (periventricular calcifications) with Cytomegalovirus; Vignette 2 (palmar/plantar rash) with Treponema pallidum; Vignette 3 (parenchymal calcifications) with Toxoplasma gondii; Vignette 4 (cataracts and PDA) with Rubella virus; and Vignette 5 (vesicular lesions) with Herpes simplex virus.
Each clinical vignette represents a classic presentation of a specific congenital or neonatal infection (TORCH). Distinguishing features include the pattern of intracranial calcifications (periventricular in CMV vs. parenchymal in Toxoplasmosis), specific rashes (palmar/plantar in Syphilis vs. vesicular in HSV), and specific congenital defects (cataracts and PDA in Rubella).
Step-by-Step Solution
Key Concept
Differentiating congenital and neonatal (TORCH) infections based on pathognomonic clinical triads, specific rash morphology, neuroimaging patterns, and their respective definitive treatments.