Tuberculosis is a contagious disease, mostly caused by contact with the tuberculosis bacilli inhaled by patients, and it is transmitted in the following ways: 1. The majority of cases are caused by drinking unsterilized or disinfected milk contaminated with Mycobacterium bovis or other foods contaminated with humanoid bacilli, mostly in the pharynx or primary lesions in the intestinal tract. 3, can be transmitted through contact with broken skin, mucous membranes, genital organs, etc. 4, congenital tuberculosis is transmitted by inhalation of the placenta or amniotic fluid, and most cases occur shortly after birth as cornual tuberculosis or genital tuberculosis.