Masters Degrees (Ophthalmology)

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Biomarker concentrations in serum and urine of patients with Ocular Tuberculosis – a prospective descriptive study.
(Stellenbosch : Stellenbosch University, 2022-03) Van der Colff, Frederich James; Smit, Derrick; Stellenbosch University. Faculty of Medicine and Health Sciences. Dept. of Ophthalmology
ENGLISH ABSTRACT: Purpose: To describe biomarker concentrations in serum and urine of South African patients with ocular tuberculosis (OTB). Methods: A prospective study to compare 29 urine and serum biomarkers in 14 OTB patients at a tertiary eye clinic. Results: Median age of participants (7 male and 7 female) was 38.5 years (range 25‐73). Most biomarker concentrations were significantly higher in serum than in urine (p < 0.01). Only two (IL‐1RA and IL‐2) showed higher concentrations in urine than serum (p < 0.01). Three biomarkers (sIL‐2Ra, sTNFRI and IFNγ) showed no difference in concentration between urine and serum (p > 0.05). Conclusions: Most biomarkers tested showed significant differences in concentration between serum and urine and therefore these 2 biofluids cannot be used interchangeably when studying biomarker profiles. One notable exception is IFNγ, as its concentration did not differ between serum and urine.