What is tuberculosis also known as?

Tuberculosis is also known historically as consumption, phthisis pulmonalis, and the white death. These older names were commonly used before modern medicine fully understood the bacterial cause of the disease.

The name “consumption” came from the way tuberculosis could cause severe weight loss, weakness, and wasting over time. Today, the medical term tuberculosis, or TB, is used most commonly. TB usually affects the lungs, but it can also affect other parts of the body, such as the lymph nodes, bones, kidneys, brain, or spine.

What are the common symptoms of tuberculosis?

The symptoms of tuberculosis depend on whether the infection is latent or active. Active TB disease can cause symptoms, especially when it affects the lungs.

Common symptoms of active pulmonary TB include:

• Cough lasting three weeks or longer
• Chest pain
• Coughing up blood or sputum
• Fever
• Night sweats
• Fatigue or weakness
• Weight loss
• Loss of appetite
• Chills

The CDC lists cough, chest pain, coughing up blood or sputum, fatigue, weight loss, fever, chills, and night sweats among common active TB symptoms.

What is the difference between latent and active TB infection?

Latent TB means the bacteria are present in the body, but the immune system is keeping them under control. People with latent TB do not feel sick, do not have symptoms, and cannot spread TB to others.

Active TB means the bacteria are multiplying and causing illness. People with active TB disease may develop symptoms and can spread the infection if the disease affects the lungs or throat.

The key difference is:

• Latent TB: bacteria are inactive, no symptoms, not contagious
• Active TB: bacteria are active, symptoms may appear, can be contagious

Latent TB can become active later, especially if the immune system becomes weakened.

How is tuberculosis transmitted?

Tuberculosis spreads through the air. When a person with active TB disease in the lungs or throat coughs, sneezes, speaks, sings, or laughs, tiny droplets containing Mycobacterium tuberculosis can enter the air.

Other people may become infected if they breathe in these airborne particles. TB is not spread by casual touch, sharing food, shaking hands, or touching surfaces.

Transmission is more likely in:

• Crowded indoor spaces
• Poorly ventilated environments
• Close and prolonged contact
• Households or shared living spaces
• Healthcare or shelter settings

The CDC describes TB as a disease caused by germs that spread from person to person through the air.

What is the causative agent of tuberculosis?

The causative agent of tuberculosis is Mycobacterium tuberculosis. This bacterium most commonly affects the lungs, but it can spread through the bloodstream or lymphatic system to other organs.

TB outside the lungs is called extrapulmonary TB. It may affect areas such as:

• Lymph nodes
• Kidneys
• Bones
• Spine
• Brain and meninges
• Abdomen

Pulmonary TB is the form most strongly linked with airborne transmission.

Is tuberculosis a significant global health concern?

Yes, tuberculosis remains a major global health concern. According to the World Health Organization, TB is still one of the world’s leading infectious disease killers, and millions of people develop TB disease each year. WHO reported that TB caused about 1.23 million deaths in 2024.

TB is especially concerning because it can spread through the air, may remain latent for years, and can become harder to treat when drug-resistant strains develop. WHO also identifies multidrug-resistant TB as a continuing public health crisis.

Can tuberculosis be treated?

Yes, tuberculosis can be treated with antibiotics. Treatment usually requires a combination of medicines taken for several months. Completing the full treatment course is extremely important because stopping early can allow the bacteria to survive and become drug-resistant.

Treatment may differ depending on whether a person has:

• Latent TB infection
• Active TB disease
• Drug-resistant TB
• TB with HIV infection
• TB outside the lungs

Early diagnosis and proper treatment help cure the infection, prevent complications, and reduce spread to others.

What is the significance of understanding the signs and symptoms of consumption?

Understanding the signs and symptoms of consumption, or tuberculosis, is important because early detection can protect both the patient and the community. TB may start with mild symptoms that are easy to ignore, such as fatigue, cough, night sweats, or weight loss.

Recognizing symptoms early can help:

• Start treatment sooner
• Prevent lung damage
• Reduce transmission
• Identify close contacts who may need testing
• Lower the risk of severe disease
• Prevent drug-resistant TB from developing

Anyone with a persistent cough, unexplained weight loss, night sweats, fever, or coughing up blood should seek medical evaluation.