Document Detail

Detection of cytomegalovirus DNA in dried blood spots of Minnesota infants who do not pass newborn hearing screening.
MedLine Citation:
PMID:  19820425     Owner:  NLM     Status:  In-Process    
BACKGROUND: Up to 15% of infants with asymptomatic congenital cytomegalovirus (CMV) infection will experience some degree of sensorineural hearing loss. Many infants who fail newborn hearing screening (NHS) are likely to have congenital CMV infection, but may escape definitive virologic identification because diagnostic evaluation may not commence until several weeks or months of age, making differentiation between congenital and postnatal CMV infection difficult. Early diagnosis linking virologic identification of congenital CMV infection to infants failing NHS may improve diagnostic precision and enhance opportunities for therapeutic intervention. METHODS: The goal of this study was to compare newborn dried blood spots from Minnesota infants who had failed NHS, and were designated for referral, with control infants who passed NHS, for the presence of CMV DNA by real-time PCR, using hybridization probes for the CMV gene UL54. RESULTS: Of 479 infants with a failed NHS (bilateral failure), 13 had CMV DNA present in the blood spot (2.7%). This compared with only 2/479 positive results from a control group of infants who passed the NHS (0.4%; P = 0.007, Fisher exact test). Comparisons of the glycoprotein B (gB) genotype as well as direct DNA sequencing of selected positives revealed that PCR positive samples represented unique clinical isolates. The mean viral load among the 15 positive samples was 1.6 x 10(3) genomes/microgram of total DNA. CONCLUSIONS: Newborn bloodspot CMV screening by real-time PCR may be a useful and rapid adjunct to functional NHS and may enable more rapid etiologic diagnosis of sensorineural hearing loss in newborns.
K Yeon Choi; Lisa A Schimmenti; Anne M Jurek; Bazak Sharon; Kathy Daly; Cindy Khan; Mark McCann; Mark R Schleiss
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Pediatric infectious disease journal     Volume:  28     ISSN:  1532-0987     ISO Abbreviation:  Pediatr. Infect. Dis. J.     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-11-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8701858     Medline TA:  Pediatr Infect Dis J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1095-8     Citation Subset:  IM    
Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN 55455-0374, USA.
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