Clinical Practice Guidelines for the Management of Congenital Syphilis in Japan, 2023: Executive Summary.

Congenital syphilis (CS) is a mother-to-child infection caused by the bacterium Treponema pallidum, transmitted through the placenta. In Japan, the number of syphilis cases has recently increased, accompanied by an increase in CS cases. Thus, automated methods for serum antibodies with serial values, without a 2× dilution sequence, have been widely used.

Nationwide Survey of Multisystem Inflammatory Syndrome in Children Associated with Coronavirus Disease 2019 in Japan.

Background: Multisystem inflammatory syndrome in children (MIS-C) presents some clinical overlap with Kawasaki disease (KD). Although KD is common in Japan, the clinical characteristics of MIS-C in Japan remain unknown. Therefore, we aimed to determine the epidemiological and clinical features of MIS-C in Japan.

Diagnostic Utility of Preserved Dried Umbilical Cord Polymerase Chain Reaction in Intrauterine Herpes Simplex Virus Infection: A Case Report and Literature Review.

Introduction: Intrauterine herpes simplex virus (HSV) infection is uncommon and challenging to diagnose, requiring detection of HSV in skin lesions within 48 h post-birth.

Case Presentation: A preterm female infant presented with the typical triad of blisters, microcephaly, and chorioretinitis, but the initial diagnostic approach was elusive due to negative results for TORCH pathogens from vesicles/serum. Referred at 7 months for developmental delay and epilepsy, her brain imaging showed calcification and cortical dysplasia.

Association between a past history of nausea and vomiting during pregnancy and fever after the BNT162b2 COVID-19 vaccination.

Purpose: Nausea and vomiting during pregnancy (NVP) are common among pregnant women and can be severe enough to require hospitalization. However, the mechanism underlying NVP pathogenesis remains unclear. This study examined factors associated with adverse events after vaccination, including a past history of NVP.