Lower plasma calcium associated with COVID-19, but not with disease severity: a two-centre retrospective cohort study.

Background: Previous studies indicate hypocalcaemia as a potential diagnostic and prognostic marker of corona-virus disease 2019 (COVID-19). Our aim was to investigate these relations in more detail in a large test cohort and an independent validation cohort.

Methods: We retrospectively included 2792 COVID-19 suspected patients that presented to the emergency department (ED) of two hospitals.

Case report: appendicitis induced Staphylococcus aureus and Klebsiella pneumoniae bacteremia in a young healthy male.

Background: Appendicitis is one of the most frequently encountered conditions at the emergency department. Distinction is made between complicated and uncomplicated appendicitis. Complicated appendicitis may cause serious intra-abdominal infection, bacteremia, or sepsis.