[Necrotizing pneumonia in a patient with selective IgA deficiency].

Background: Inborn errors of immunity originate from monogenic mutations that should be considered in the suggestive diagnosis of patients with recurrent or severe infections, allergies, autoimmunity, autoinflammatory diseases, bone marrow failure and malignancy.

Case Report: Pediatric patient, male, 4 years old, treated in the medical service for fever of 39°C, difficult to control. The simple chest x-ray reported left pulmonary consolidation.

[Association of illicit drug use in pregnant women and congenital syphilis in a public hospital in Mexico].

We conducted a nested case-control study within a cohort with the aim of studying the association between illicit drug use and congenital syphilis (CS). Cases were diagnosed based on treponemal and non-treponemal tests conducted both in the mother and the newborn (NB). Multivariate analysis with logistic regression was performed.