RT Journal Article SR Electronic T1 Severe metabolic ketoacidosis as a primary manifestation of SARS-CoV-2 infection in non-diabetic pregnancy JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e241745 DO 10.1136/bcr-2021-241745 VO 14 IS 4 A1 van Amesfoort, Jojanneke Epke A1 Werter, Dominique E A1 Painter, Rebecca C A1 Hermans, Frederik J R YR 2021 UL http://casereports.bmj.com/content/14/4/e241745.abstract AB We present a case of a metabolic acidosis in a term-pregnant woman with SARS-CoV-2 infection.Our patient presented with dyspnoea, tachypnoea, thoracic pain and a 2-day history of vomiting, initially attributed to COVID-19 pneumonia. Differential diagnosis was expanded when arterial blood gas showed a high anion gap metabolic non-lactate acidosis without hypoxaemia. Most likely, the hypermetabolic state of pregnancy, in combination with maternal starvation and increased metabolic demand due to infection, had resulted in metabolic ketoacidosis. Despite supportive treatment and rapid induction of labour, maternal deterioration and fetal distress during labour necessitated an emergency caesarean section. The patient delivered a healthy neonate. Postpartum, after initial improvement in metabolic acidosis, viral and bacterial pneumonia with subsequent significant respiratory compromise were successfully managed with oxygen supplementation and corticosteroids. This case illustrates how the metabolic demands of pregnancy can result in an uncommon presentation of COVID-19.