Abstract

BackgroundInfection is a leading cause of morbidity, mortality and hospital admission in systemic lupus erythematosus (SLE) patients. Aim of the workTo study infection in SLE patients regarding site of infection, pathogenic organism, hospitalization and/or intensive care unit (ICU) admission. Patients and methodsThis study included 79 patients. SLE disease activity index (SLEDAI-2K) and damage index were evaluated. Detailed information about the site of infection and pathogens were reported. Results71 females and 8 male patients (F:M 8.9:1), with a mean age of 29 ± 9.6 years (17–55 years) and disease duration of 5.9 ± 5.7 years, 55 (69.6%) patients had infection at time of study while 24 (30.4%) did not. The SLEDAI-2 k and damage index were significantly higher in SLE patients with infection (14.2 ± 11.8 and 3.7 ± 3.7) compared to those without infection (5.9 ± 5.03 and 1.8 ± 1.3) (p = 0.03 and p = 0.045 respectively). Those with infection had a shorter disease duration (4.9 ± 5.2 vs 8.3 ± 6.2; p = 0.005), received more cyclophosphamide (56.4% vs 16.7%; p = 0.001), higher erythrocyte sedimentation rate (ESR) (75.5 ± 27.1 vs 35.8 ± 24.7 mm/1sthr) (p < 0.0001) and consumed complement (C3) (71.1 ± 28.4 vs 97.2 ± 28.2; p < 0.0001). 17/55 (30.9%) had more than one site of infection and 46/55 (83.6%) required hospital admission. 17 (30.9%) of hospitalized patients were transferred to the ICU. The main pathogenic organisms were bacterial (40%), fungal (27.3%), viral (10.9%) and unconfirmed in 21.8%. Chest was the commonest site (40%) followed by the skin (34.4%), oropharynx (25.5%) and urinary tract (20%). ConclusionInfection is an important cause of hospital and ICU admission in SLE patients. Early disease, disease activity and damage, cyclophosphamide, ESR and consumed C3 were associated with infection in SLE.

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