1. Towards a New Strategy for Diagnosis of Congenital Trypanosoma cruzi Infection
- Author
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Cristina Ballart, Silvia Tebar, Joaquim Gascon, J Armengol, Montserrat Gállego, Teresa Llovet, Carmen Muñoz, Teresa Juncosa, Victoria Fumadó, Oriol Coll, Pere Berenguer, Mercedes Herrero, María-Jesús Pinazo, Montserrat Portús, Elizabeth Posada, Jordi Bosch, Carmen Martí, Gemma Ginovart, and Alba Abras
- Subjects
Spain ,0301 basic medicine ,Pediatrics ,serology ,Antibodies, Protozoan ,Disease ,Polymerase Chain Reaction ,Serology ,0302 clinical medicine ,congenital Chagas disease ,Mass Screening ,Medicine ,immigrant population ,medicine.diagnostic_test ,biology ,Transmission (medicine) ,Europe ,Child, Preschool ,Childbearing age ,flowchart ,Female ,Antibody ,Microbiology (medical) ,Chagas disease ,medicine.medical_specialty ,countries of endemicity ,Trypanosoma cruzi ,030106 microbiology ,030231 tropical medicine ,Enzyme-Linked Immunosorbent Assay ,03 medical and health sciences ,Humans ,Chagas Disease ,Serologic Tests ,business.industry ,Infant, Newborn ,Infant ,medicine.disease ,biology.organism_classification ,Infectious Disease Transmission, Vertical ,Immunoglobulin G ,Immunoassay ,biology.protein ,Parasitology ,business ,Immunity, Maternally-Acquired - Abstract
The immigration of Latin American women of childbearing age has spread the congenital transmission of Chagas disease to areas of nonendemicity, and the disease is now a worldwide problem. Some European health authorities have implemented screening programs to prevent vertical transmission, but the lack of a uniform protocol calls for the urgent establishment of a new strategy common to all laboratories. Our aims were to (i) analyze the trend of passive IgG antibodies in the newborn by means of five serological tests for the diagnosis and follow-up of congenital Trypanosoma cruzi infection, (ii) assess the utility of these techniques for diagnosing a congenital transmission, and (iii) propose a strategy for a prompt, efficient, and cost-effective diagnosis of T. cruzi infection. In noninfected newborns, a continuous decreasing trend of passive IgG antibodies was observed, but none of the serological assays seroreverted in any the infants before 12 months. From 12 months onwards, serological tests achieved negative results in all the samples analyzed, with the exception of the highly sensitive chemiluminescent microparticle immunoassay (CMIA). In contrast, in congenitally infected infants, the antibody decline was detected only after treatment initiation. In order to improve the diagnosis of congenital T. cruzi infection, we propose a new strategy involving fewer tests that allows significant cost savings. The protocol could start 1 month after birth with a parasitological test and/or a PCR. If negative, a serological test would be carried out at 9 months, which if positive, would be followed by another at around 12 months for confirmation.
- Published
- 2017
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