Abstract

In imported falciparum malaria, systemic inflammation with increased capillary permeability can cause life-threatening complications, such as acute pulmonary edema (APO) or adult respiratory distress syndrome (ARDS). This observational study assessed the association of the admission serum albumin level (ALB) and C-reactive protein to albumin ratio (CRP/ALB) with disease severity and these respiratory complications. All adult cases hospitalized during 2001-2015 in the Charité University Hospital, Berlin, with ALB and CRP values measured upon admission, were retrospectively analysed. Seventy-six patients were enrolled (26 female, median age: 37 y), 60 with uncomplicated malaria and 16 with severe malaria (SM). SM was associated with lower ALB (p<0.0001) and higher CRP/ALB (p<0.0001) values; the areas under the receiver operator curves (AUROCs) were 0.85 (95% CI 0.74 to 0.96) for ALB and 0.88 (95% CI 0.80 to 0.97) for CRP/ALB. Radiologic changes consistent with APO/ARDS were detectable in 5 of 45 admission chest X-rays performed (11.1%); the AUROCs were 0.86 (95% CI 0.74 to 0.99) for ALB and 0.91 (95% CI 0.82 to 0.99) for CRP/ALB. Diminished admission ALB levels and elevated CRP/ALB ratios are associated with disease severity and respiratory complications in imported falciparum malaria. These readily and ubiquitously available markers may facilitate early identification of at-risk patients.

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