Paratuberculosis (PTB). also known as Johne's disease. is a chronic contagious granulomatous disease of a wide variety of animals. It is caused by Mycobacterium avium subsp. https://www.hindigyanvishv.com/hot-find-Facia-Installation-Kit-Suits-Holden-Commodore-VE-Series-2-FP9550BK-Black-top-mega/