Tuberculosis (TB): Causes, Symptoms, and Treatment Explained

A persistent cough can be easy to overlook, but it may be a sign of tuberculosis. Though TB can be cured, it continues to impact millions of Indians annually, with a primary reason being late detection. At Mahatma Gandhi Medical College & Hospital (MGMCH), Jaipur, our doctors stress one message: early diagnosis and a complete course of tuberculosis treatment can cure TB. This guide provides simple and easy-to-understand information about the causes, symptoms, tests, and treatment.

What Is Tuberculosis?

TB is an infection caused by the bacterium. Typically affects the lungs (pulmonary tuberculosis), but it can attack other parts of the body. Not all people who are infected with the bacteria become sick. For many individuals, the immune system can control the germ; this is known as latent TB infection. Once the germ is active and begins to grow, it is an active tuberculosis disease.

What Causes Tuberculosis?

It is caused by a germ known as Mycobacterium tuberculosis. It is a tough and slow-growing bacterium, so treatment needs to be for months. So, TB is not caused by dirt, bad character, or bad luck but by a bacterial infection.

Some individuals have a greater risk of getting ill:

• People with HIV/AIDS
• People with diabetes
• People with nutrition deficiencies or low weights
• Those who smoke and drink heavily are also at risk.
• Those taking long-term steroids or other drugs that make their immune systems weaker
• Persons who live or work in close contact with an infectious person with TB

What causes TB?

Is tuberculosis contagious? Yes, but active TB in the lungs or throat only. Tiny droplets of the germ-containing particles float in the air when this person coughs, sneezes, speaks or sings, and others inhale these germs. There is no evidence that handshakes, sharing of utensils, bedding, or toilet seats are involved in the transmission of TB.

People with latent TB infection cannot pass it on. The risk of transmission is increased in poorly ventilated, overcrowded rooms. After a few weeks of proper medication, a patient will be significantly less infectious, and it will be up to the doctor to instruct you.

Signs and Symptoms of TB

Early signs and symptoms of TB are easy to confuse with a seasonal cough. Look out for these indicators.

Symptoms of TB in lungs:

• A cough that persists for more than 2 weeks
• Blood or bloody mucus in cough.
• Chest pain, especially while breathing or coughing
• Breathlessness
• General symptoms of TB:
• Fever, usually in the evening
• Night sweats
• Weight loss and loss of appetite—not explained
• Constant tiredness

If you have noticed a cough that lasts for 2 weeks or longer and you experience any of these symptoms, have a test. Never allow it to "settle itself."

Types of Tuberculosis

There are two categories of TB:

Pulmonary tuberculosis is the most common form, which affects the lungs. It is also the one that is passed from one person to another.

Extrapulmonary tuberculosis involves infections of organs other than the lungs.

Common types include:

TB that affects the lymph nodes: Non-painful swelling typically in the neck area.

Tuberculous spondylitis is an infection of the bones and joints that leads to pain, swelling, and stiffness.

Spinal tuberculosis: TB of the spine. It can result in chronic back pain, stiffness, and occasionally deformity or weakness of legs. Damage to the nerves can be avoided if treatment is started early enough.

Abdominal TB: leads to weight loss, abdominal pain, and abdominal bloating.

TB meningitis: Infection of the lining of the brain. It is an emergency medical condition.

Miliary tuberculosis: A severe type in which the bacteria travel through the blood to many parts of the body, causing small spots that resemble millet seeds when scanned.

What tests are used for the diagnosis of tuberculosis?

The diagnosis of tuberculosis is based on your symptoms and where you have the infection. Your doctor may recommend:

• Sputum tests are performed to look at the sample under the microscope and also to use molecular tests to identify the germ and determine if it is resistant to commonly-used medicines.
• Lung X-rays: Reveal lung abnormalities that are indicative of TB.
• Tuberculosis test of the skin/blood: The Mantoux skin test and the IGRA blood test will indicate whether you have been infected, but it will not differentiate between latent TB and active disease.
• CT, MRI, biopsy, or fluid tests: Used to find TB outside the lungs, such as in the spine, lymph nodes, or abdomen.

A culture test is longer but will confirm the germ and will aid in drug-resistant cases.

Treatment for tuberculosis

Is tuberculosis curable? Yes. Drug-sensitive TB can be effectively treated with the right drugs and correct adherence to the treatment.

How long does TB treatment take? The basic treatment for drug-sensitive TB is about six months. The first two months are a combination of 4 medicines. Typically, 2 are used in the next 4 months. Some forms (bone, spinal, brain, or drug-resistant TB) require a year or more.

Important guidelines for people with TB:

Never stop early: Symptoms go away within a few weeks; the bacteria remain alive. Early stopping results in "relapse" and "drug-resistant TB.

Follow the doctor's instructions for taking medicines every day at the same time.

Report side effects: The doctor should be notified immediately if nausea, yellow eyes, rash, joint pain, or vision changes occur. Avoid stopping on sidewalks.

Follow-up for checkups and tests.

Eat well: Eating well contributes to healing the body.

What Happens If TB Is Left Untreated?

Untreated active tuberculosis does not go away. It can damage the lungs permanently, spread to other organs, cause serious bleeding and breathing failure, and become fatal. An untreated patient also infects others at home, at work, and in the community. Early treatment protects both you and the people around you.

Tuberculosis Prevention

Tuberculosis prevention rests on a few simple habits:

• Finish treatment so that patients stop spreading the infection.
• Cover your mouth when coughing and wear a mask in crowded places when you have symptoms.
• Improve ventilation at home and work: Open windows to let germs disperse.
• Screen close contacts of a TB patient: Family members may need tests or preventive medicines.
• Tuberculosis vaccine: The BCG vaccine is given to infants in India. It protects young children well against severe forms such as TB meningitis and miliary TB, but protection against adult lung TB is limited, so it does not replace the other measures.
• Control diabetes, avoid smoking, and eat nutritious food to keep immunity strong.

World Tuberculosis Day

World Tuberculosis Day is observed every year on 24 March. It marks the day in 1882 when Dr. Robert Koch announced the discovery of the bacterium that causes TB. It is a reminder that TB can be ended through awareness, early testing, and complete treatment.

Why Choose MGMCH for TB and Lung Care?

If you or a family member shows tuberculosis symptoms, MGMCH offers specialist care in one place. For over 25 years, the hospital has served patients, and today it has 1450+ beds, 55+ departments, and 400+ doctors. In 2025, Mahatma Gandhi Medical College & Hospital became the first academic medical center in India to receive Joint Commission International (JCI) accreditation, an international benchmark for patient safety.

What this means for TB patients:

• Relevant specialties: The hospital has departments for pulmonary medicine, infectious diseases, orthopedics, neurology, neurosurgery, and general medicine, which together cover lung, bone, spine, and brain TB.
• Experienced faculty: The Pulmonary Medicine department is headed by Dr. Suresh Koolwal, Professor & Head.
• Diagnostic support: Radiodiagnostic services and diagnostic laboratories help with X-rays, scans, and lab tests.
• Critical care: Emergency services and an intensive care unit are available for serious or breathless patients.
• Care beyond medicines: Dietetics, physiotherapy and rehabilitation, and psychological counselling help patients recover strength and cope with a long treatment.
• Easy access: You can book appointments online, and the hospital offers telemedicine for follow-up.

Conclusion

Tuberculosis is serious, but it is not a life sentence. Know the warning signs, get tested early, and complete every dose of treatment, and TB can be cured. If you have a cough that lasts more than two weeks, fever, night sweats, or unexplained weight loss, do not delay. Book a consultation with the team at Mahatma Gandhi Hospital (MGMCH), Jaipur, and get the right diagnosis and a clear treatment plan.