Cytomegalovirus Detection in Infants

Diagnostic Methods

Using centrifugation-assisted shell vial culture amplification techniques, CMV can be detected within 16-40 hours of culture inoculation, as recommended by the Centers for Disease Control and Prevention 1, 2
Diagnosis of congenital CMV must be performed using specimens collected within the first 21 days of life to distinguish congenital from acquired postnatal infection, according to the American Academy of Otolaryngology-Head and Neck Surgery 3
DNA assays (PCR) are more sensitive than traditional buffy-coat or urine cultures for detecting CMV, with a sensitivity of 89.4% and specificity of 99.5% compared to urine PCR, as reported by the Centers for Disease Control and Prevention 1, 4

Some pediatric experts recommend testing all infants with HIV infection for CMV with a urine culture during the first months of life, as suggested by the Centers for Disease Control and Prevention 1, 5
For general population screening, saliva PCR is increasingly used for initial testing, with confirmation by urine PCR for positive results, according to the American Academy of Otolaryngology-Head and Neck Surgery 3
Quantitative DNA PCR can be used as a marker of risk for disease progression and to monitor response to therapy, as recommended by the Centers for Disease Control and Prevention 1, 4

Annual CMV antibody testing of previously seronegative and culture-negative infants and children, beginning at age 1 year, can identify those who develop occult CMV infections, as suggested by the Centers for Disease Control and Prevention 1, 6
Antibody testing has limited utility in infants under 12 months due to maternal antibody transfer, and a positive CMV antibody assay in an infant aged <12 months indicates maternal infection but not necessarily infection of the infant, as reported by the Centers for Disease Control and Prevention 1, 7