A nurse is assessing a newborn whose mother had a positive TORCH screening during pregnancy. Which assessment finding would be most indicative of congenital toxoplasmosis?
1Petechial rash and hepatosplenomegaly
2Cataracts and patent ductus arteriosus
3Vesicular skin lesions and seizures
4Chorioretinitis and intracranial calcifications✓ 정답
해설
Chorioretinitis and intracranial calcifications are pathognomonic for congenital toxoplasmosis, distinguishing it from other TORCH infections. Other findings (petechial rash, cataracts, vesicular lesions) are more typical of different TORCH pathogens.
Core Nursing ExplanationKey Concept Analysis: This question tests the ability to differentiate the classic clinical manifestations of specific TORCH infections (Toxoplasmosis, Other (syphilis, varicella-zoster, parvovirus B19), Rubella, Cytomegalovirus (CMV), and Herpes simplex virus (HSV)). Congenital toxoplasmosis results from maternal infection with the parasite Toxoplasma gondii, often from undercooked meat or contact with infected cat feces. The parasite can cross the placenta and cause significant damage to the fetal central nervous system (CNS) and eyes.
Answer Rationale: Key Point! The classic triad for congenital toxoplasmosis includes chorioretinitis (inflammation of the choroid and retina), intracranial calcifications (often periventricular), and hydrocephalus. Option ④ directly lists two of these hallmark findings. Chorioretinitis can lead to vision impairment, and intracranial calcifications are a key diagnostic feature seen on cranial ultrasound or CT scan.
Distractor Analysis:
Watch out for confusion! Option ①, "Petechial rash and hepatosplenomegaly," is highly characteristic of congenital Cytomegalovirus (CMV) infection and can also be seen in congenital rubella. It represents a generalized systemic infection.
Option ②, "Cataracts and patent ductus arteriosus (PDA)," is the classic presentation of congenital Rubella syndrome. Other features include sensorineural hearing loss and congenital heart defects.
Option ③, "Vesicular skin lesions and seizures," points strongly toward congenital Herpes Simplex Virus (HSV) infection, which is often acquired during delivery rather than in utero. Neonatal HSV is a severe, disseminated infection that frequently involves the CNS.
Related Concepts: Understanding TORCH infections is crucial for neonatal assessment. While there is some symptom overlap (e.g., all can cause microcephaly or hearing loss), each has distinctive "signature" findings that help in differential diagnosis. Nursing care involves vigilant assessment for these specific signs, supporting diagnostic testing, and providing family education about prevention, especially for toxoplasmosis.
Nursing Clinical Practice GuideClinical Scenario: You are a nurse in the Neonatal Intensive Care Unit (NICU). A newborn is admitted for evaluation due to maternal history of a positive TORCH screen (specifically for toxoplasmosis IgG and IgM) during the third trimester. The infant is full-term but appears irritable and has a slightly enlarged head circumference.
Nursing Intervention Strategy:
1AssessmentPerform a thorough head-to-toe assessment with a focus on neurological and ophthalmologic signs. Use a penlight to check for the red reflex in both eyes; its absence or abnormality may suggest chorioretinitis. Monitor for signs of increased intracranial pressure (bulging fontanelle, high-pitched cry, setting-sun sign) which could indicate developing hydrocephalus. Document seizure activity meticulously.
2Diagnostic CoordinationPrepare the infant for ordered diagnostic tests. This includes assisting with a cranial ultrasound or CT scan to look for intracranial calcifications and ventricular size. An ophthalmology consult for a formal retinal exam is critical.
3Medication Administration & MonitoringIf congenital toxoplasmosis is confirmed, the standard treatment involves a prolonged course of antiparasitic medications like pyrimethamine and sulfadiazine, along with folinic acid (leucovorin) to prevent bone marrow suppression. Key Point! Administer these drugs exactly on schedule and monitor for side effects like rash, vomiting, and signs of bone marrow suppression (pallor, lethargy, petechiae). Frequent complete blood count (CBC) monitoring is required.
4Family Support & EducationProvide non-judgmental emotional support to the parents, who may feel guilty. Educate them on the importance of completing the long-term medication regimen. For future pregnancies, counsel on prevention: avoid eating undercooked meat, wear gloves when gardening, avoid changing cat litter (or have someone else do it), and wash fruits and vegetables thoroughly.
Patient Safety and Precautions: Handle the infant gently, especially if hydrocephalus is present. Maintain strict infection control practices, as these infants may be immunocompromised due to the infection or medication side effects. Be vigilant for medication interactions and toxicity.
Nursing Procedure & Medication FlowMedication Administration for Congenital Toxoplasmosis:
1VerifyConfirm the diagnosis and the specific medication orders (drug, dose, route, frequency). Pyrimethamine and sulfadiazine are typically given orally.
2PrepareCrush tablets if necessary and mix with a small amount of formula or sterile water. Ensure leucovorin (folinic acid) is also prepared and administered as prescribed to protect the bone marrow.
3AdministerGive the medication via oral syringe slowly, along the inside of the cheek, ensuring the infant swallows. Follow with a small amount of formula to ensure the full dose is taken.
4MonitorDocument administration. Schedule and coordinate follow-up lab draws for CBC and liver function tests. Observe for any signs of adverse drug reactions.
A Word from Your Senior Nurse
"TORCH infections can be intimidating with all their acronyms and overlapping symptoms, but if you remember their 'party tricks'—the one or two classic findings that scream a specific infection—you'll ace these questions. In the real NICU, your keen assessment skills are the first line of defense. Noticing a subtle lack of red reflex or a peculiar head shape can trigger the right consults and get that baby on treatment faster, potentially saving their vision or cognitive function. Always connect the pathophysiology (parasite damaging the brain and eyes) to the clinical signs (calcifications, chorioretinitis). That's how you move from memorizing to truly understanding."
TORCH — Acronym for a group of perinatal infections: Toxoplasmosis, Other (syphilis, varicella, parvovirus B19), Rubella, Cytomegalovirus (CMV), Herpes simplex virus (HSV). They can cause severe congenital anomalies.
Chorioretinitis — Inflammation of the choroid and retina layers of the eye. A classic finding in congenital toxoplasmosis, which can lead to vision loss.
Intracranial Calcifications — Calcium deposits in the brain tissue, often seen on imaging studies like ultrasound or CT. Periventricular calcifications are pathognomonic for congenital toxoplasmosis.
Congenital Rubella Syndrome — A condition caused by maternal rubella infection, characterized by cataracts, congenital heart defects (e.g., PDA), sensorineural hearing loss, and "blueberry muffin" rash.
Hydrocephalus — An abnormal accumulation of cerebrospinal fluid (CSF) in the ventricles of the brain, causing increased intracranial pressure. It is part of the classic triad for congenital toxoplasmosis.