结核分枝杆菌：抗酸染色 免疫荧光 脾粟粒性肉芽肿性炎（大体） 肠系膜上淋巴结 巨噬细胞内见鸟型分枝杆菌
This spleen shows a miliary pattern of granulomatous inflammation, with numerous small tan granulomas. This suggests a poor immune response. This patient had AIDS. The infection turned out to be Mycobacterium avium-intracellulare (MAI), also known as Mycobacterium avium-complex (MAC).