Abstract

Background: Melioidosis, caused by Burkholderia pseudomallei, is a serious infectious disease in Southeast Asia and northern Australia. Methods: We systematically reviewed observational studies measuring C-reactive protein (CRP) in laboratory-confirmed melioidosis for diagnosis, severity assessment, or outcome evaluation. PubMed, Embase, and Scopus were searched up to May 2025. Data were pooled using a random-effects model; heterogeneity was quantified (I²). Results: Seven studies (n = 451) were included. The pooled mean CRP level in melioidosis was 74.37 mg/L (95% Confidence Interval [CI], 32.76–168.83; I² = 99.1%), considerably higher than healthy reference values (<10 mg/L). Conclusions: CRP is consistently raised in melioidosis and may aid in early diagnosis and severity monitoring, although high heterogeneity limits the precision of pooled estimates. Integration of CRP into multimodal prediction tools, rather than use in isolation, is recommended. Further prospective studies should define optimal diagnostic thresholds.