The first wave of the COVID-19 epidemic in Spain was associated with early introductions and fast spread of a dominating genetic variant.

The coronavirus disease 2019 (COVID-19) pandemic has affected the world radically since 2020. Spain was one of the European countries with the highest incidence during the first wave. As a part of a consortium to monitor and study the evolution of the epidemic, we sequenced 2,170 samples, diagnosed mostly before lockdown measures.

Helicobacter pylori antimicrobial resistance during a 5-year period (2013-2017) in northern Spain and its relationship with the eradication therapies.

Background: Antibiotic resistance is the main cause for Helicobacter pylori therapy failure. Frequently, empirical regimens have been recommended in patients with various H. pylori eradication failures.

Pneumocystis Jirovecii Pneumonia in a Patient with Anti-N-Methyl-D-Aspartate Receptor Postherpetic Encephalitis.

Anti-N-methyl-D-aspartate receptor encephalitis is a neuroimmunologic disorder that has been increasingly diagnosed during the past 5 years. It provokes a predictable syndrome treated with several immunomodulatory agents, such as corticosteroids and/or biologics. We managed a child with this disease who developed Pneumocystis jirovecii pneumonia as a direct infectious complication of the use of rituximab.