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.
Poo gets its typical brown color from bile, a greenish emulsifier that's secreted by your liver and gallbladder to aid in the digestion of fats. Bile needs to spend several hours in the colon to develop this color, which means that poos passing through too quickly may retain the greenish hue.