Tuberculosis (TB)introduction

Tuberculosis (TB) is a chronic infectious disease caused by the bacterium Mycobacterium tuberculosis. It primarily affects the lungs (pulmonary TB) but can also involve other organs such as the lymph nodes, bones, brain, kidneys, and intestines.

TB spreads through the air when an infected person coughs, sneezes, or speaks.

Types of Tuberculosis

1️.Pulmonary Tuberculosis

• Affects the lungs

• Most common and contagious form

2️.Extrapulmonary Tuberculosis

• Affects organs outside the lungs

• Includes TB of lymph nodes, bones, brain (TB meningitis), abdomen, kidneys

Causes of Tuberculosis

Tuberculosis is caused by inhalation of airborne droplets containing Mycobacterium tuberculosis. The infection spreads when a person with active pulmonary TB coughs, sneezes, or speaks. However, not everyone exposed to the bacteria develops the disease; progression depends largely on immune system strength and individual risk factors.

Risk factors include:

• Close contact with a TB patient

• Weak immune system (HIV, diabetes)

• Malnutrition

• Smoking and alcohol use

• Overcrowded living conditions

Symptoms of Tuberculosis

The symptoms of tuberculosis develop gradually and may initially be mild, which often delays diagnosis. Pulmonary TB commonly presents with persistent cough, fever, weight loss, and night sweats. In advanced cases, symptoms may become more severe and affect overall health and daily functioning. 

Common Symptoms

• Persistent cough for more than 2–3 weeks

• Fever (especially evening rise)

• Night sweats

• Weight loss

• Loss of appetite

• Fatigue

Pulmonary TB Symptoms

• Cough with sputum

• Blood in sputum (hemoptysis)

• Chest pain

• Shortness of breath

Extrapulmonary TB Symptoms

• Swollen lymph nodes

• Bone or joint pain

• Headache or confusion (TB meningitis)

• Abdominal pain

Diagnosis of Tuberculosis

The diagnosis of tuberculosis involves clinical evaluation supported by laboratory and imaging investigations. Early and accurate diagnosis is crucial not only for effective treatment but also for preventing community transmission. Modern diagnostic tools allow rapid detection and identification of drug resistance.

TB is diagnosed using:

• Sputum examination (AFB smear, CBNAAT/GeneXpert)

• Chest X-ray

• Tuberculin skin test (Mantoux test)

• Blood tests

• Biopsy in extrapulmonary TB

Treatment of Tuberculosis

Tuberculosis is a curable disease when treated appropriately with a combination of anti-tubercular medications. Treatment requires strict adherence for several months to ensure complete eradication of the bacteria and to prevent the development of drug-resistant TB. Early initiation and uninterrupted therapy are key to successful outcomes.

TB is curable with proper treatment.

Anti-Tubercular Treatment (ATT)

• Combination of antibiotics

• Treatment duration: 6 months or longer

• Must be taken regularly without interruption

Common drugs include:

• Isoniazid

• Rifampicin

• Pyrazinamide

• Ethambutol

 Incomplete treatment can lead to drug-resistant TB.

Drug-Resistant Tuberculosis

Occurs when TB bacteria become resistant to standard medicines due to:

• Irregular treatment

• Stopping medicines early

• Incorrect drug dosage

Drug-resistant TB requires longer and specialized treatment.

Prevention of Tuberculosis

• BCG vaccination (given in childhood)

• Early detection and complete treatment

• Good nutrition

• Avoid overcrowding

• Use masks in high-risk settings

• Screening of close contacts

Tuberculosis and Nutrition

Good nutrition supports recovery:

• High-protein diet

• Fruits and vegetables

• Adequate calories

• Proper hydration

Avoid:

• Alcohol

• Smoking

When to See a Doctor

Seek medical care if you have:

• Chronic cough

• Unexplained weight loss

• Persistent fever

• Blood in sputum

Early diagnosis improves outcomes and prevents spread.

Conclusion

Tuberculosis is a serious but curable disease. With early diagnosis, proper medication, and treatment completion, TB can be fully cured and complications prevented. Awareness and adherence to treatment are key to TB control.

-medskology medical team

 Disclaimer

This article is for educational purposes only and does not replace professional medical advice. Always consult a qualified healthcare provider for diagnosis and treatment.