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924 Diagnosis and Prognosis of Congenital Toxoplasmosis
  1. MG Capretti1,
  2. M De Angelis1,
  3. M Spinelli1,
  4. C Marsico1,
  5. E Tridapalli1,
  6. A Moroni2,
  7. A Marangoni2,
  8. L Corvaglia1,
  9. G Faldella1
  1. 1Department of Obstetrical, Gynaecological and Paediatric Sciences, Operative Unit of Neonatology
  2. 2Department of Haematology, Oncology and Laboratory Medicine, Operative Unit of Microbiology and Virology, St. Orsola-Malpighi University Hospital, University of Bologna, Bologna, Italy

Abstract

Aims Congenital toxoplasmosis can cause neurological impairment and ocular disease. To describe clinical profile of infants with suspected congenital toxoplasmosis.

Methods Observational study of infants born to mothers with a suspected infection with Toxoplasma gondii during pregnancy between 2002 and 2011.

Serological tests were performed at birth: Toxoplasma specific antibodies IgA, IgM, IgG by Enzyme Immune Assay (EIA), Enzyme Linked Fluorescent Assay (ELFA), Western Blot (WB) tests and WB-IgG compared analysis for mother-infant pairs. Infants underwent cranial Ultrasound Scanning, fundoscopy examination, Auditory Brainstem Response, and periodic clinical evaluations.

Results One hundred thirty-one infants Toxoplasma IgG-positive at birth were evaluated; 118/131 (90%) become IgG-negative at 12 months of life.

Congenital toxoplasmosis was confirmed in 13/131 infants (9.9%). Transmitters pregnant women seroconverted in the third trimester (mean 28±8weeks).

IgM-ELFA test was positive in 9/13 infants; in 4/13 infants IgM positivity was detected by WB test (negative IgM-EIA/ELFA). Three of 6 infants had a different IgG-WB reactivity compared to their mothers.

Six of 13 infected infants (46%) were symptomatic at birth: 2/13 infants developed chorioretinitis; 4/13 had a pathological neuroimaging (4/4 cerebral calcifications, 1/4 ventriculomegaly). None had hearing loss. Infected infants received one-year therapy (pyrimethamine/sulfadiazine); 1/13 infant developed neutropenia as adverse therapy effect.

At a median age of 2 years all infected infants had a normal psychomotor development (range 1–10 years).

Conclusions It is advisable to perform IgM/IgG-WB on infant serum and the compared analysis for mother-infant pairs within the first month of life when high risk factors for Toxoplasmosis transmission are present.

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