Tuberculosis makes a comeback in Spain.
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TB cases on the rise, prisons hit hardest, and public health experts urge early detection to stop the spread.
It’s back. Spain is witnessing a worrying uptick in cases of tuberculosis, a disease once dubbed the ‘white plague’ that haunted Europe for centuries. While modern medicine has kept it largely at bay, new figures suggest the ancient disease isn’t going quietly.
Health authorities in Spain have sounded the alarm after urban hotspots across the country reported fresh outbreaks. And although the national picture remains far better than many other countries, experts warn that complacency could let this old killer in through the back door.
The numbers don’t lie: Tuberculosis is on the rise in Spain
Roughly 4,000 new cases of TB are recorded in Spain each year, according to the Ministry of Health. Most infections target the lungs, but the bacteria can hit other organs too, including the lymph nodes, bones, and even the nervous system.
While overall infection rates have declined over decades, recent clusters in cities and a 14% spike among foreign inmates in Spanish prisons have thrown a spanner in the works.
At a recent public health update in Madrid, Enrique Acín García, head of Spain’s Prison Health Department, revealed that TB rates in jails had dropped overall, except among inmates from outside Spain, where cases have jumped significantly. Of 31 cases in 2024, 10 involved foreign prisoners, up from the previous year. The data suggest an overall incidence of 69.3 per 100,000 inmates.
That might sound low – but it’s still more than double the national average. Critics argue that there should be better prevention measures to screen inmates before they enter the prison system to avoid the spread.
How TB spreads (and who’s most at risk)
Tuberculosis spreads through the air via microscopic droplets when someone with active TB coughs, sneezes or even speaks. Not everyone exposed gets sick – but those who do can become highly contagious.
‘Contact doesn’t mean contagion,’ say experts – but poor ventilation, close proximity, and weak immune systems raise the risk dramatically. That’s why jails, shelters, and overcrowded homes remain breeding grounds.
People with HIV, diabetes, or those on immune-suppressing treatments are especially vulnerable, as are the elderly, young children, and those living in poverty. Healthcare workers and drug users also feature on the high-risk list.
Tuberculosis: A global concern with local consequences in Spain
Globally, TB remains a public health concern, infecting 10 million people each year, according to the World Health Organization. After the COVID-19 wave subsided, TB quietly crept back up to become the deadliest infectious disease on the planet.
While Spain’s situation is far better than many, the recent trends suggest complacency is a luxury we can’t afford. Whether in prisons, urban centres, or among vulnerable communities, TB is once again knocking on the door.
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