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HB 643

Newborn screening program; include cytomegalovirus (CMV) in conditions tested for.

2025 Regular Session Introduced by Steve Horne

Mississippi bill would require newborn screening for cytomegalovirus to identify congenital infections and prevent hearing loss and developmental disabilities in infants.

Died In Committee
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Bill Summary · HB 643

Legislative bill overview

HB 643 would expand Mississippi's newborn screening program to include cytomegalovirus (CMV) testing as a standard condition screened in all newborns. Currently, Mississippi's program does not mandate CMV testing, though some states have added it to their screening panels. The bill would require healthcare providers to test newborns for this viral infection before hospital discharge.

Why is this important

CMV is the most common congenital infection in the U.S., affecting approximately 1 in 200 newborns, and can cause hearing loss, vision problems, developmental delays, and intellectual disabilities if undetected. Early identification through newborn screening allows for prompt medical intervention and monitoring that can improve long-term outcomes. Expanding screening coverage addresses a significant gap in Mississippi's current public health infrastructure for detecting preventable childhood disabilities.

Potential points of contention

  • Program costs and implementation: Adding CMV testing increases operational expenses for the newborn screening program, potentially requiring new equipment, training, and follow-up protocols, raising questions about funding sources and feasibility
  • False positives and anxiety: CMV testing may produce false positives, leading to unnecessary parental stress and additional medical procedures before confirmatory testing, without clear evidence of universal screening benefit
  • Limited treatment consensus: Unlike some screened conditions, treatment protocols for asymptomatic CMV-positive newborns remain debated among medical professionals, making the clinical utility of routine screening less clear-cut

Compiled from official sources — confirm details with the bill’s official record.

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