Tuberculosis (TB) remains one of the world’s most persistent public health challenges. Caused by the bacterium Mycobacterium tuberculosis, the disease primarily affects the lungs but can also spread to other organs. Despite being preventable and curable, tuberculosis continues to claim millions of lives each year, particularly in low‑ and middle‑income countries. The World Health Organization (WHO) publishes an annual report that tracks the epidemic, offering insights into prevention, diagnosis, and treatment progress at global, regional, and national levels.
Global Tuberculosis Trends
The WHO’s 2023 report revealed that 8.2 million people were newly diagnosed with tuberculosis, the highest annual case count since global TB tracking began in 1995. This marked a sharp increase from 7.5 million new cases in 2022. While TB deaths declined slightly—from 1.32 million in 2022 to 1.25 million in 2023—the numbers remain alarming, especially when compared to the 320,000 COVID‑19 deaths recorded in the same year.
The burden of tuberculosis is not evenly distributed. Thirty countries, mostly low‑ and middle‑income nations, account for 87% of global TB cases. Among them, five countries—India, Indonesia, China, the Philippines, and Pakistan—contribute more than half of the world’s TB burden. Demographically, men represent 55% of TB patients, women 33%, and children/adolescents 12%.
Risk Factors Driving Tuberculosis
Tuberculosis does not occur in isolation. The WHO report highlights five major risk factors that significantly increase vulnerability:
- Malnutrition weakens immunity, making individuals more susceptible.
- HIV infection increases the risk of developing TB symptoms by up to 20 times.
- Alcohol use disorders and smoking both compromise lung health and immunity.
- Diabetes doubles or triples the risk of contracting TB and is linked to higher rates of drug‑resistant TB.
These risk factors underline the need for integrated health strategies that go beyond TB treatment alone.
Tuberculosis in India
India carries the world’s largest TB burden. In 2023, the country was estimated to have 2.7 million TB cases, with 2.51 million individuals diagnosed and receiving treatment. This raised India’s treatment coverage to 89%, a significant improvement from 72% in 2015. The incidence rate also fell from 237 per 100,000 people in 2015 to 195 per 100,000 in 2023—a 17.7% reduction.
The India TB Report 2024 highlighted further progress:
- TB mortality decreased from 28 per lakh in 2015 to 23 per lakh in 2022.
- Private healthcare providers reported 33% of TB cases in 2023, showing improved collaboration with government systems.
- India successfully initiated treatment for 95% of diagnosed TB patients, meeting its national target.
Despite these gains, challenges remain. Malnutrition continues to affect nearly 744,000 TB patients, while HIV and diabetes complicate treatment outcomes. In 2022, 94,000 TB patients were also diagnosed with HIV, and 102,000 had diabetes.
Transmission and Symptoms of Tuberculosis
Tuberculosis spreads through the air when infected individuals cough, sneeze, or spit, releasing bacteria into the environment. Common symptoms of active TB include:
- Persistent cough, sometimes with blood
- Chest pain
- Weakness and fatigue
- Weight loss
- Fever and night sweats
Most TB cases occur in adults, but children and adolescents remain vulnerable, especially in high‑burden countries.
Treatment and Drug Resistance
Standard TB treatment involves a six‑month course of four antimicrobial drugs, administered under supervision to ensure adherence. However, drug resistance poses a growing challenge.
- Multidrug‑resistant TB (MDR‑TB): Caused by bacteria resistant to isoniazid and rifampicin, the two most powerful first‑line drugs.
- Extensively drug‑resistant TB (XDR‑TB): A more severe form, resistant to second‑line drugs, leaving patients with limited treatment options.
Newer drugs like bedaquiline have improved outcomes for MDR‑TB, but scaling up access remains critical.
India’s Initiatives to Eliminate Tuberculosis
India has set an ambitious target to eliminate TB by 2025, five years ahead of the global goal of 2030. Key initiatives include:
- Pradhan Mantri TB Mukt Bharat Abhiyan: A nationwide campaign to eradicate TB.
- National TB Prevalence Survey: The largest survey ever conducted to assess true TB burden.
- TB Harega Desh Jeetega Campaign: Focused on awareness, early diagnosis, and treatment.
- WHO’s “Find. Treat. All. #EndTB” initiative: A global partnership supporting India’s efforts.
- Global Plan to End TB (2023–2030): Provides a roadmap of priority actions and financial resources needed to end TB worldwide.
World Tuberculosis Day
Observed annually on 24th March, World Tuberculosis Day raises awareness about the devastating health, social, and economic consequences of TB. The day commemorates Dr. Robert Koch’s 1882 discovery of Mycobacterium tuberculosis, which paved the way for diagnosis and treatment. The theme for 2025—“Yes! We can end TB Yes: Commit, Invest, Deliver”—reflects global optimism and determination.
To Download Monthly Current Affairs PDF Click here
Click here to get a free demo
Discover all about CLAT Exam
