Figure 1. Infection of human PBMC with Mycobacterium tuberculosis resulted in formation of microscopic granulomas. PBMCs infected with: (A) H37Ra (100x), (B) BCG (100x), (C) Escherichia coli ATCC 25922 (200x), (D) Staphylococcus aureus ATCC 25923 (200x), or (E) uninfected PBMCs (100x). (F) Wright-Giemsa staining showing microgranulomas formed after 24 h of infection with H37Ra (400x).
