Diagnostic laboratory tests A Specimens Aspirates of lymph nodes Cerebrospinal fluid Blood putul B. Smears Giemsa's stain immunofluorescent stain C. Culture D. SerologyDiagnostic laboratory tests A. Specimens: – Aspirates of lymph nodes – Cerebrospinal fluid – Blood – Sputum B. Smears: -Giemsa’s stain -immunofluorescent stain C. Culture D. Serology