tb in blood :: Article Creator What Are The Causes Of Tuberculosis? Know The Importance Of Early Diagnosis For Timely Intervention Tuberculosis, (TB) is a bacterial infection that takes a toll on the lungs. It is considered as top infectious killer. Millions of people with TB are unaware of their health status, suffer in silence, and lose their precious lives. The symptoms of TB are cough, constant cough with mucus or blood, fatigue, weight loss, fever, breathing problems, fever and chills. TB spreads through the air when an infected person coughs, sneezes or speaks. The cause: When we spoke to Dr Abhik Banerjee, Zonal Technical Chief East and Pathologist at Apollo Diagnostic, Kolkata, he said conditions like HIV/AIDS, diabetes, or certain medications can make you more susceptible. Smoking tends to damage the lungs and raise the chances of TB. If left untreated, TB can cause permanent scarring of lung tissue, leading to breathing difficulti...