50 Fun Facts About Tuberculosis

Which species of bacterium is the usual cause of TB?

Its waxy, lipid-rich cell wall means it barely takes up a Gram stain at all.

By what name was tuberculosis most commonly known in nineteenth-century English?

The word comes from Latin roots meaning to take up completely from under.

How does tuberculosis usually spread?

The droplets can stay airborne and infective for hours in a poorly ventilated room.

Which organ does active tuberculosis most commonly involve, in about 90% of cases?

In 15 to 20% of active cases it spreads elsewhere, causing forms such as Pott disease of the spine.

Who identified the bacillus that causes tuberculosis in 1882?

He won the 1905 Nobel Prize in Physiology or Medicine for the discovery, and the date is now World TB Day.

On what date is World Tuberculosis Day marked each year?

It is the anniversary of Koch's original scientific announcement.

Roughly what fraction of the world's population is estimated to have latent tuberculosis?

That is about 2 billion people; without treatment 5 to 15% of them will develop active disease in their lifetime.

Can people with latent tuberculosis infect others?

Most infections never produce symptoms at all.

Which vaccine, first used in 1921, was still the only licensed TB vaccine as of 2025?

Bacille Calmette-Guerin was first used on humans in France in 1921 and uses an attenuated bovine strain; newer candidates such as M72/AS01E were still in trials in 2025.

In what year did Calmette and Guerin achieve the first genuine success in immunising against tuberculosis?

Their vaccine only won wide acceptance in the US, Britain and Germany after World War II.

Which antibiotic, developed in the 1940s, first made a cure for tuberculosis a reality?

Rates were already falling thanks to sanitation and vaccination before it arrived.

Which PhD student first isolated the first anti-TB antibiotic in 1943 in Selman Waksman's lab?

He later sued Waksman for credit and royalties, settling for 3% against Waksman's 10%.

In which year did Selman Waksman win the Nobel Prize for the first anti-TB antibiotic?

The citation called it the first antibiotic active against tuberculosis.

How long is the usual course of first-line drug treatment for tuberculosis?

After about two weeks of effective treatment most patients stop being contagious, but stopping early breeds resistance.

Which of these is one of the four first-line tuberculosis drugs?

The others are isoniazid, pyrazinamide and ethambutol.

Multi-drug resistant tuberculosis is defined as resistance to which two drugs?

Extensively drug-resistant TB adds resistance to a fluoroquinolone and another Group A drug.

How often does the TB bacillus divide, making it unusually slow-growing?

Most bacteria manage it in under an hour, which is one reason TB cultures take weeks.

The disease takes its name from the tubercle, which is what?

Immune cells wall off infected macrophages, and the centre of the nodule dies.

Which type of immune cell does the TB bacterium colonise and survive inside after being engulfed?

It can survive and replicate inside the phagosome, eventually destroying the cell that swallowed it.

Koch's 1890 'remedy' tuberculin failed as a cure but was later adapted into what?

A skin test injects a little of it into the forearm to screen high-risk people.

The tuberculin skin screening injected into the forearm is named after which physician?

Prior BCG vaccination can give a false positive, which is why interferon-gamma release assays are used as follow-up.

Which ancient Greek physician described phthisis, generally equated with tuberculosis, around 400 BCE?

He called it a disease of dry seasons; the Indian Vedas refer to a similar wasting illness, yaksma.

Researchers have found tubercular decay in the spines of Egyptian mummies dating from roughly when?

Earlier evidence still goes back to the early Neolithic, some 10,000 years ago.

Roughly what proportion of all deaths in Europe did tuberculosis cause at its nineteenth-century peak?

In 1815 one in four deaths in England was down to the disease; by 1918 it was still one in six in France.

What was scrofula historically called because monarchs were thought able to cure it by touch?

The touchings began under Philip I of France and Henry I of England; the patient received a gold coin called an angel.

Deaths from tuberculosis in 19th-century New England were associated in folklore with what?

People believed the first family member to die was draining the life from the rest.

Who opened the first tuberculosis sanatorium, in 1859, in Silesia?

Even at the best sanatoria around 1916, half of those admitted were dead within five years.

Where was the first tuberculosis sanatorium in North America established, in 1885?

The Adirondack Cottage Sanitarium became a model for the fresh-air cure across the continent.

Which Thomas Mann novel is set in a tuberculosis sanatorium?

Puccini's La boheme and Verdi's La Traviata put the disease on the opera stage.

Which of these Romantic poets is listed among the famous figures who had tuberculosis?

Chopin, Chekhov, Kafka, Charlotte Bronte, Orwell and Modigliani are on the same grim roll call.

Which physician claimed in 1819 that tubercles were the cause of pulmonary tuberculosis?

Schonlein published the name Tuberkulose in 1832, and it was only in the 1820s that TB was recognised as one disease.

Who demonstrated in 1865 that tuberculosis could be transmitted by inoculation from humans to animals?

Marten had guessed at microbes back in 1720; Burdon-Sanderson confirmed Villemin's work in 1867 and 1868.

Which everyday process nearly eliminated milk-borne bovine TB in developed countries?

Koch himself doubted cattle and human TB were similar, which delayed recognition of infected milk.

Early-1900s health campaigns against tuberculosis targeted which everyday habit?

In the US, TB fears helped drive laws restricting spitting to spittoons.

In which country were the first Christmas seals sold in 1904 to raise money against tuberculosis?

Postal clerk Einar Holboll's idea sold over 4 million seals in its first year and was later copied by Emily Bissell in the US.

In which year did the World Health Organization declare tuberculosis a global health emergency?

The resurgence was driven partly by drug resistance and partly by the HIV pandemic.

People with HIV are about how many times more likely to develop active TB than those without?

TB is the leading cause of death among people living with HIV.

Roughly how many people died of tuberculosis in 2024, making it the leading infectious killer?

Incidence reached an estimated 10.7 million people that year.

Which rapid molecular test does the WHO recommend to diagnose TB and detect first-line drug resistance?

The WHO, the Gates Foundation and the US government subsidised it for poorer countries in 2012.

By what percentage does the WHO's End TB strategy aim to cut tuberculosis deaths by 2030?

The 2020 milestone of a 35% reduction was missed; deaths had only fallen 14%.

As of 2023, which country accounted for 6.8% of global TB cases, the fourth-highest share worldwide?

More than two-thirds of the global burden falls on eight countries including India, China, Indonesia and Nigeria.

Which small southern African kingdom had an estimated 664 new TB infections per 100,000 people in 2023?

Sub-Saharan Africa carries a particularly heavy burden of HIV-associated TB.

In which year did Robert Koch receive the Nobel Prize for his tuberculosis discovery?

He had identified and described the bacillus on 24 March 1882, the date now marked as World TB Day.

Tuberculosis of the bones and joints, especially the spine, is known by what name?

Infection spreads beyond the lungs in 15 to 20 percent of active cases, and in more than half of those with HIV.

What is the severe, disseminated form of TB called, with tiny white tubercles throughout the body?

It is most common in young children and people with HIV, and kills about 30 percent of patients even with treatment.

DNA studies suggest the TB bacterium's ancestors adapted to humans in Africa roughly how long ago?

The bacteria then spread across the globe with migrating humans, long before the first skeletal evidence around 4000 BC.

What did the acronym DOTS, the WHO's first global TB strategy launched in 1995, stand for?

A health worker watches the patient swallow each dose; the approach sharply improved case detection and cure rates.

Roughly what share of new TB cases occur in the 30 high-burden countries?

More than two-thirds of the global burden falls on just eight nations including India, Indonesia, China and Nigeria.

Which Norwegian painter appears on the list of artists who suffered from tuberculosis?

The 'romantic disease' also claimed Chopin, Chekhov, Kafka, Orwell and Modigliani among many others.

Roughly how many people does the WHO estimate fell ill with tuberculosis in 2024?

That made it the leading cause of death from a single infectious agent, with about 2 billion people carrying latent infection.