pulmonary tb in the lungs is contagious it spreads when a person who has active tb breathes out air that has the tb bacteria in it and then another person breathes in the bacteria from the air an infected person releases even more bacteria when he or she does things like cough or laugh
An ideal bowel movement is medium brown, the color of plain cardboard. Stool that is pale or grey may be caused by insufficient bile output due to conditions such as gallstones, hepatitis, chronic pancreatitis, or cirrhosis. Bile salts from the liver give stool its brownish color.
What Does Color Mean? Baby poop changes color and it's a constant concern for parents. But for the most part, it needn't be. Color has not much to do with anything except the transit time of food [in the baby's system] and the bile coming through the GI tract, Steinmetz says.