⁃ Brucellosis： Patients with any of the following confirmed the evidence.

• sample culture: Brucella;

• Specific antigen or antibody (IgG or IgM) positive. epidemic hemorrhagic fever：

⁃ 1 specific antibody positive 2 Hantavirus RNA positive kala-azar：

• latent infection: rK39 antibody positive

• patients with the following evidence of kala-azar diagnosis: 1) bone marrow, spleen puncture sample culture: Leishmania; 2) bone marrow, spleen puncture sample smear: Leishmania; 3) clinical symptoms, history of exposure or epidemiology, and positive screening test (rK39 positive)