Resumen

HENEN, Florencia Natalia et al. Tamizaje de sífilis congénita en el binomio madre-hijo: validez de la sangre de cordón. Acta bioquím. clín. latinoam. [online]. 2019, vol.53, n.3, pp.337-341. ISSN 0325-2957.

Cord blood is a non-invasive alternative which has been used for screening of congenital syphilis. The aims of the present study were to evaluate the validity of the use of cord blood as a sample for the screening of a probable congenital syphilis case, to study the prevalence of maternal syphilis, to analyse the rate of probable congenital syphilis case and to determine the percentage of non-studied mothers for syphilis in the peripartum. A retrospective and observational analysis was conducted between June 2017 and May 2018. Cord blood and maternal blood serology results were taken from the Laboratory Information System. Unheated Serum Reagin was used as a screening test and FTA-Abs and/or quimioluminiscense as confirmatory studies. Infant-mother binomies without cord blood studies were excluded. Infant-mother binomies studied: 2487. Sensibility and specificity 82.29% [95% CI: 73.17 to 89.33] and 99.96% [95% CI: 99.76 to 100.00], respectively. MSP prevalence: 4.04%. Probable congenital syphilis case rate: 26/1000 NB. Non-studied mothers for syphilis in the peripartum: 70 (2.86%). Cord blood would not be a valid sample for screening due to the low sensibility found, although in many cases it is the only opportunity to evaluate the infant-mother binomies.

Palabras clave : Congenital syphilis; Cord blood; Screening.

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