(Table 4) The increase in serum ACE level was significant for patients with presumed sarcoidosis compared to patients with AS (p = 0.0001), BD (p = 0.0001), presumed latent TB (p = 0.0001), presumed latent syphilis (p = 0.0001), and control group (p = 0.0001). Here, ACE is linked to latent syphilis.