Supplementary materials

Supplementary data S1: Example of an IgM and IgG mother and child immunoblot pair profile with identical profiles and the infant’s IgM triplet (pink box). The child was proved to be infected subsequently during follow-up. m, mother; i, infant. Reproduced from Peyclit et al. 2023 [21]. Access here

Supplementary data S2: Immunoblot obtained using sera positive for the IgM triplet (NNTPos; Patients 1BB to 16BB) or negative for this same IgM triplet (NNTNeg; Patients 17BB to 19BB). The black box indicates the location of spots 21 to 24 only found on NNTPos sera and marked by arrows when present. The immunoblot obtained with the NNTNeg sera from the patient 19BB shows spots 25 and 26, which were excluded because they were not specific to the IgM triplet. Access here

© M. Carreno et al., published by EDP Sciences, 2025