Elevated Dengue Virus Nonstructural Protein 1 Serum Levels and Altered Toll-Like Receptor 4 Expression, Nitric Oxide, and Tumor Necrosis Factor Alpha Production in Dengue Hemorrhagic Fever Patients

Figure 3

Nitric oxide serum levels (μM of ) of dengue infected patients () during the acute phase of the disease presenting low (NS1 < 100 × 10³ BRU/mL) and high (NS1 ≥ 100 × 10³ BRU/mL) dengue virus nonstructural protein 1 (NS1) serum levels measured by Griess reaction after reduction of serum samples with nitrate reductase. Results were expressed as median using a box plot. Equivalent symbols () represent statistically significant differences () between groups.