48 Fun Facts About Tuberculosis

The bacterium that causes TB belongs to which genus?

Mycobacterium. The genus wears a thick, waxy coat that shrugs off the standard lab stain and helps it survive drying out, weak disinfectants and the body's own defences.

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

Consumption. The word had meant a wasting illness since the 1300s, and it fitted the way patients grew thinner and weaker, as if the disease were using them up.

How does tuberculosis usually spread?

It travels through the air when an infected person coughs, sneezes, talks or sings. Catching it usually takes long hours of shared indoor air, so most people get it from family or workmates.

Which literary family lost at least five of its six children to tuberculosis?

The Brontës. Maria and Elizabeth died as schoolgirls in 1825, and Branwell, Emily and Anne followed within nine months of one another in 1848-49, leaving Charlotte the last of the six.

Who identified the bacillus that causes tuberculosis in 1882?

Robert Koch. The germ is so hard to stain and so slow to grow that he had to devise new methods for both before he could show it to fellow doctors under the microscope.

World Tuberculosis Day marks the 1882 announcement of the TB germ's discovery in which city?

Berlin, on 24 March. The discoverer laid his microscope slides and other evidence before a room of fellow scientists; the campaign day itself was first proposed for the centenary in 1982.

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

One-quarter, roughly two billion people. Most will never fall ill: the bacteria stay walled off and dormant in about nine carriers out of ten.

How do people with latent TB infection differ from those with active tuberculosis?

They cannot spread it, and they feel perfectly well. A course of preventive medicine can clear the dormant bacteria before they ever wake up.

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

BCG, short for Bacille Calmette-Guérin. It shields babies from the deadliest childhood forms of TB but gives adults only patchy protection, and as of 2025 nothing better had been licensed.

Which ancient disease is caused by a close cousin of the TB bacterium, from the very same genus?

Leprosy. The two germs are such close relatives that the century-old vaccine against TB also gives partial protection against leprosy.

Penicillin did nothing against TB, so which 1940s antibiotic became the first that could cure it?

Streptomycin. In Britain's first trial patients rallied, then many worsened as the germ grew resistant to the lone drug, which is why TB has been treated with several drugs at once ever since.

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

Albert Schatz. He sued his supervisor to be recognised as co-discoverer and won a share of the royalties, yet the 1952 Nobel Prize went to the supervisor alone.

The first antibiotic to cure TB came from a microbe found in what?

Soil. The lab behind it had been systematically testing soil microbes for any that held back the TB germ; one winning strain came from a heavily manured field, another from a chicken's throat.

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

Six months. Patients often feel well within weeks, but stopping the pills early can let the surviving bacteria bounce back, this time resistant to the drugs.

Before antibiotics, doctors often treated a tuberculous lung by deliberately doing what to it?

Collapsing it. Letting air into the chest made the diseased lung go slack so that it could 'rest' and heal, the mainstay of treatment for the first half of the 20th century.

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

Rifampicin and isoniazid, the two most effective first-line drugs. Strains that shrug off both need longer, costlier, harsher treatment, and only about two in five patients got it in 2024.

How often does the TB bacterium divide, a pace that makes it unusually slow-growing?

About once a day, where a gut bacterium such as E. coli can divide every 20 minutes. That is why growing TB from a patient's sample can take weeks to give an answer.

Tuberculosis is named after the tubercle, which is what?

A small, hard nodule. Immune cells pile up around the bacteria to wall them in, which stops the infection spreading, though the germs can survive inside the wall.

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

Macrophage. These cells normally digest whatever they swallow, but the TB bacterium blocks that step, breeds inside and eventually destroys its would-be killer.

Tuberculin, launched in 1890 as a TB 'remedy', failed as a cure but was later adapted into what?

A skin test for infection. Hailed as a cure, the extract proved ineffective and opinion swung against it, but a tiny dose under the skin turned out to reveal who was carrying the germ.

The forearm injection used to check for TB infection is named after which physician?

Mantoux. Charles Mantoux devised it in the 1900s: a drop goes into the skin and the bump is measured two or three days later, though a past TB vaccination can set off a false alarm.

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

Hippocrates. He noted that it struck mainly between the ages of eighteen and thirty-five, and he believed it ran in families instead of passing from person to person.

Roughly how old are the oldest Egyptian mummies that show the spinal damage of tuberculosis?

About 5,000 years. The telltale sign is a spine collapsed into a sharp hump, damage so distinctive that it can be recognised in bones thousands of years after death.

Tuberculosis was long nicknamed a 'plague' and a 'death' of which colour?

White. The great white plague and the white death took their name from the extreme pallor of the sick, a wan look that fashionable society even came to admire.

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

The king's evil. English and French monarchs touched sufferers for centuries, and English kings came to hang a gold coin called an angel round each patient's neck as a charm.

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

Vampires. Families believed the first to die was draining the life from those who sickened next, so bodies were dug up and their hearts burned, as with Mercy Brown in Rhode Island in 1892.

Who founded the sanatorium in Silesia in the 1850s that launched the open-air cure for tuberculosis?

Hermann Brehmer. By one account he had cured his own TB in the Himalayas as a student; his clinic put patients on fresh air, walks and plentiful food, and was copied across Europe.

Edward Trudeau's Cottage Sanitarium, which made the fresh-air TB cure famous in America, stood in which Adirondack village?

Saranac Lake. Trudeau, a doctor with TB himself, housed his first two patients in a one-room cottage called Little Red; Robert Louis Stevenson later came for the cure.

Which Thomas Mann novel is set in a tuberculosis sanatorium?

The Magic Mountain. Its hero arrives at an Alpine clinic for a three-week visit and stays seven years; Mann himself needed over a decade to finish it, interrupted by the First World War.

Which Romantic poet, who had trained as a surgeon, died of tuberculosis in Rome in 1821?

John Keats. When he first coughed up blood in 1820 he recognised it at once as arterial, called it his death warrant, and sailed for Italy's warmer air that autumn.

René Laennec, who traced pulmonary TB to tubercles and died of it, invented which instrument?

The stethoscope. He first rolled a sheaf of paper into a tube to listen to a patient's heart, was delighted by how clearly he could hear, and went on to build a hollow wooden cylinder.

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

Pasteurisation. The TB germ's discoverer told a 1901 congress that cattle TB was no danger to people, a claim leading scientists strongly disputed; heat-treating milk later closed that route.

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

Spitting in the street. Coughed-up phlegm was thought to dry into germ-laden dust, so campaigners lectured the public and pushed for laws confining spit to spittoons.

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

Denmark. A Danish postal clerk, Einar Holbøll, had the idea of a charity stamp for Christmas mail; in 1907 Emily Bissell copied it to save a small Delaware sanatorium and raised ten times her $300 goal.

What did the World Health Organization declare tuberculosis in 1993?

A global emergency. After decades of decline and complacency, cases were climbing again, driven in part by strains that the standard drugs could no longer kill.

Tuberculosis is the leading cause of death among people living with which infection?

HIV. The virus weakens the immune defences that keep dormant TB in check, leaving people about 12 times more likely to fall ill; TB killed some 150,000 people with HIV in 2024.

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

About 1.2 million, more than any other single infection killed, although TB is preventable and curable. More than four in five of those deaths were in low- and middle-income countries.

A charity based in Tanzania trains which animals to sniff out tuberculosis in patients' sputum samples?

Rats. The charity APOPO trains giant pouched rats, better known for finding landmines, and says one of them can check in minutes a batch of samples that would take a lab technician all day.

Which country had the most new tuberculosis cases in 2024, far more than any other?

India, with about 25% of the world's new cases. China, with a population just as large, had roughly a fourth as many, after cutting its own rate by more than a third since 2010.

Which small southern African kingdom had Africa's highest estimated tuberculosis rate as of 2024?

Lesotho, with about 550 new cases a year for every 100,000 people. Even that is roughly half the rate the country suffered in 2010.

Which gunfighter of OK Corral fame went west for his tuberculosis and died of it in Colorado?

Doc Holliday. Advised to seek a drier climate for his health, he left his dental practice in Georgia for the gambling tables of the frontier, and outlived the famous gunfight by six years.

Tuberculosis of the spine, which can collapse the vertebrae into a sharp hunch, is known by what name?

Pott's disease, after the British surgeon Percivall Pott, who described it in 1779. As infected vertebrae crumble, the spine can buckle and press on the spinal cord, sometimes causing paralysis.

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.

A DNA study of 259 TB strains concluded the bacterium emerged with humans in Africa roughly how long ago?

70,000 years, about when modern humans were spreading out of Africa, and the germ seems to have travelled with them. A rival study of ancient skeletons in Peru argued for a far more recent origin.

What does DOTS, the tuberculosis control strategy the WHO launched in the mid-1990s, stand for?

Directly Observed Treatment, Short-course. A health worker watches the patient swallow every dose, because people who start to feel better are tempted to stop months too soon.

In Britain, which wild mammal has been culled and vaccinated in efforts to stop bovine TB spreading to cattle?

Badgers. They were identified as carriers in 1971 and decades of culling followed, but England issued its last cull licence in 2024 and by 2026 was moving to vaccination instead.

Edvard Munch painted The Sick Child six times in memory of which relative, who died of tuberculosis at 15?

His sister, Johanne Sophie, who died in 1877. Their mother had died of the same disease nine years earlier, and he kept returning to the deathbed scene for some forty years.

Which novel did George Orwell finish on a Scottish island while gravely ill with the tuberculosis that soon killed him?

Nineteen Eighty-Four. He finished the final draft on Jura at the end of 1948, collapsed, and spent the year of its publication in a sanatorium and hospital, dying in January 1950.