Brito, G. da R. et al. 2020. Severe Kala-azar and seric level of IL-6: case reports. Journal of Health & Biological Sciences. 8, 1 (jul. 2020), 1–4. DOI:https://doi.org/10.12662/2317-3076jhbs.v8i1.3035.p1-4.2020.