Tuberculosis (TB) is one of the most persistent infectious diseases, affecting millions of people worldwide. Marked annually on March 24, World Tuberculosis Day aims to raise awareness about TB, its symptoms, causes, and the urgent need for prevention and treatment. Though TB primarily targets the lungs, it can spread to other organs, making early detection crucial.
What Causes TB and How It Spreads
TB is caused by the bacterium Mycobacterium tuberculosis (Mtb). It spreads through airborne particles when an infected person with active TB coughs, sneezes, or even speaks, releasing bacteria into the air. While not everyone who inhales these bacteria falls sick, those who do develop either latent TB (inactive and non-contagious) or active TB (symptomatic and infectious).
Symptoms of TB
People with latent TB show no symptoms, but active TB can manifest through persistent coughing (sometimes with blood), chest pain, fatigue, weight loss, fever, and night sweats. When TB affects other parts of the body, such as the brain, kidneys, or spine, symptoms vary depending on the infected organ.
Risk Factors
Certain individuals are at higher risk of developing active TB, especially those with weakened immune systems. People with HIV/AIDS, diabetes, malnutrition, or chronic smoking habits face increased vulnerability. Infants and the elderly also have a greater likelihood of developing severe TB infections.
Global Impact and Challenges
TB remains a major global health threat. In 2023, 1.25 million people died from TB, surpassing COVID-19 as the leading infectious disease killer. Around 10.8 million people were diagnosed with TB that year, yet only 40% of those with drug-resistant TB received proper treatment. Despite being preventable and curable, drug-resistant strains of TB continue to pose a severe challenge. These strains resist standard antibiotics, requiring stronger, costlier treatments.
The Road Ahead
The World Health Organization (WHO) has set an ambitious goal to eliminate TB by 2030 under the United Nations Sustainable Development Goals (SDGs). However, to achieve this, a global investment of $22 billion annually is required to enhance TB prevention, detection, and treatment.
On World Tuberculosis Day 2025, raising awareness and strengthening healthcare strategies are crucial steps toward ending this devastating disease.
