A purified protein by-product (PPD) check, often known as a Mantoux tuberculin pores and skin check (TST), is a technique used to find out if a person has been contaminated with Mycobacterium tuberculosis, the micro organism that causes tuberculosis (TB). It includes injecting a small quantity of PPD beneath the pores and skin of the forearm. After 48 to 72 hours, a healthcare skilled checks the injection web site for a response. The dimensions of any raised, laborious space (induration) is measured and, together with different danger elements, used to find out if the check is optimistic or detrimental, indicating potential TB an infection.
Figuring out latent TB an infection is essential, particularly throughout being pregnant, as a result of being pregnant can weaken the immune system, probably permitting latent TB to grow to be energetic. Energetic TB poses vital well being dangers to each the pregnant particular person and the growing fetus, together with elevated danger of untimely beginning, low beginning weight, and congenital TB. Traditionally, screening for TB in pregnant people has been a significant public well being measure to stop the unfold of the illness and shield weak populations.