In my post about Pneumonitis cause, symptoms and treatment in children, I have mentioned that I will take my little boy to have a PPD skin test or mantoux test because he is thin, been sick lately for consecutive days and weight is not good at his age. PPD (purified protein derivative) skin test is a method used to diagnose tuberculosis (TB) or primary complex. The photo below is the actual forearm of my little boy where PPD extract was injected. I just marked a red circle at the area. … [Read more...] about What is PPD skin test in children?