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Updated: May 2, 2026
Use of In vivo Imaging to Monitor the Progression of Experimental Mouse Cytomegalovirus Infection in Neonates
Published on: July 6, 2013
[Universal cytomegalovirus infection screening in premature newborns less than 1500 g]
F Botet1, J Figueras Aloy2, E Álvarez2
1Comité de Estándares, Sociedad Española de Neonatología; Grupo Castrillo, Sociedad Española de Neonatología, Infecciones por Citomegalovirus.
Insights
Cytomegalovirus (CMV) infection poses risks to preterm infants. Early diagnosis via viral DNA testing at 4-6 weeks is crucial for classifying infection status and guiding management.
Area of Science:
- Virology
- Neonatology
- Infectious Diseases
Context:
- Cytomegalovirus (CMV) infection is common, with daycare children being a primary source.
- Vertical transmission of CMV to preterm infants (<1500g) is a significant concern.
- While most newborns are asymptomatic, symptomatic cases have poor prognosis, including neurological disorders.
Purpose:
- To establish evidence-based recommendations for managing vertical CMV transmission in preterm infants.
- To outline diagnostic strategies for identifying congenital versus acquired CMV infection.
- To define a classification system for CMV infection status in neonates.
Summary:
- CMV infection in pregnant women can lead to fetal infection, with preterm infants facing worse long-term neurological outcomes.
- Urine CMV identification is key; early detection suggests congenital infection, while later detection may indicate postnatal acquisition.
- Recommended diagnosis involves viral DNA testing at 4-6 weeks, with mandatory monitoring of early samples and breast milk if positive.
Impact:
- Facilitates timely diagnosis and classification of CMV infection in high-risk preterm infants.
- Enables targeted interventions to mitigate adverse neurological outcomes associated with CMV.
- Provides a framework for managing CMV transmission through breast milk and other postnatal routes.
Introduction:
Cytomegalovirus (CMV) infection is endemic, and children who attend day care are the most important source of infection.
Objective:
To establish recommendations based on the medical evidence on the vertical transmission of cytomegalovirus in preterm infants weighing less than 1500g at birth.
Background:
Infection in pregnant women may be primary or secondary. Although there is fetal infection, 85% of newborn infants are asymptomatic. Symptoms of infection include low birth weight, hepatosplenomegaly, thrombocytopenia, microcephaly and neurological disorders. The prognosis of symptomatic children is very poor, with high mortality and neurological disorders. The virus can be reactivated during breast feeding, and early infection is possible through breast milk, probably with little impact in term infants, although the long-term neurological outcome worsens in preterm infants. The diagnostic method of choice is the identification of CMV in urine; the determination in the first two weeks of life suggests congenital infection; later it can be acquired at birth or through breast milk or contaminated blood transfusion.
Conclusion And Recommendation:
Determine viral DNA at 4-6 weeks of life by protease chain reaction. If it is positive, monitoring of samples from the first days of life and breast milk are mandatory. This should allow the newborn to be classified into three states: "Without CMV infection", "Congenital CMV infection", "Acquired CMV infection".
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