Infective route Ingestion of infected food or milk Swallowing of infected sputum from active lung disease Hematogenous spread from active pulmonary tB Direct spread from adjacent viscera Fudan University ZhongshanHlespitamFudan University Zhongshan Hospital www.themegallery.com Infective Route • Ingestion of infected food or milk • Swallowing of infected sputum from active lung disease • Hematogenous spread from active pulmonary TB • Direct spread from adjacent viscera