Mendelian susceptibility to mycobacterial disease (MSMD) is a rare genetic disorder characterized by impaired immunity against intracellular pathogens, such as mycobacteria, attenuated Mycobacterium bovis -Bacillus Calmette–Guérin (BCG) vaccine strains, and environmental mycobacteria in otherwise healthy individuals. Retrospective study reviewed the clinical, immunological, and genetic characteristics of patients with MSMD in Mexico. Overall, 22 patients diagnosed with MSMD from 2006 to 2021 were enrolled: 14 males (64%) and eight females. After BCG vaccination, 12 patients (70%) developed BCG infection. Furthermore, 6 (22%) patients developed bacterial infections mainly caused by Salmonella , as what is described next in the text is fungal infections, particularly Histoplasma. Seven patients died of disseminated BCG disease. Thirteen different pathogenic variants were identified in IL12RB1 ( n = 13), IFNGR1 ( n = 3), and IFNGR2 ( n = 1) genes. Interleukin-12Rβ1 deficiency is the leading cause of MSMD in our cohort. Morbidity and mortality were primarily due to BCG infection. Supplementary Information The online version contains supplementary material available at 10.1007/s10875-022-01357-8.
The current pandemic of the novel coronavirus SARS-CoV-2 infection has affected over 6 million humans around the planet. The clinical manifestations of Coronavirus disease 2019 (COVID-19) are diverse, ranging from asymptomatic or mild flu-like symptoms to atypical pneumonia, severe respiratory distress syndrome, systemic inflammation, immune dysregulation and dyscoagulation.
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