Almost forgotten today, tuberculosis is still one of the deadliest infectious diseases in the world. In an interview with Coliquio, Ronald D. Gerste, MD, PhD, an ophthalmologist and historian, looked back on this disease’s eventful history, which encompasses outstanding discoveries and catastrophic failures in diagnosis and treatment from the Middle Ages to the present day.
Under different names, TB has affected mankind for millennia. One of these names was the “aesthetic disease,” because it led to weight loss and pallor in the younger patients that it often affected. This was considered the ideal of beauty in the Victorian era. Many celebrities suffered from the disease, including poets and artists such as Friedrich Schiller, Lord Byron, and the Bronte family. As recently as the early 1990s, the disease almost changed world history, because Nelson Mandela became ill before the negotiations that led to the end of apartheid in South Africa.
Today, the global community is still not on track to meet its self-imposed targets for controlling the infectious disease, as reported by the World Health Organization on World TB Day in late March. Children and young people are the leading victims. In 2020 alone, 1.1 million children and adolescents under age 15 years were infected with TB, and 226,000 died of the disease, according to the WHO.
Q: Nelson Mandela was ill with tuberculosis during his imprisonment. How did the disease manifest itself in the future Nobel Peace Prize winner, and what is known about the treatment?
Ronald D. Gerste: Nelson Mandela contracted tuberculosis in 1988. At that time, he was 70 years old and had been in prison for 26 years. The disease presented in him with the almost classic symptom: He was coughing up blood and was also increasingly fatigued and losing weight. After doctors initially suspected a viral infection, but then TB was proven, he was treated with medication, and fluid was also drained from his lungs. [Mr.] Mandela was hospitalized for six weeks at Tygerberg Hospital in Cape Town, the second largest hospital in South Africa. The therapy worked well, but [Mr.] Mandela’s lungs remained damaged. He was subsequently prone to pneumonia and was repeatedly hospitalized for pneumonia in 2012 and 2013.
Q: Mandela was lucky that the treatment worked for him. A few years later, the first antibiotic-resistant pathogen strains developed. How did medical research respond to this development?
Gerste: The emergence of multidrug resistant (MDR) strains of the pathogen prompted the WHO to declare a “global health emergency” in 1993. Three years later, World TB Day was proclaimed to raise awareness of the threat posed by this disease, which has been known since ancient times. It always takes place on March 24, the day in 1882 when Robert Koch gave his famous lecture in Berlin in which he announced the discovery of the pathogen Mycobacterium tuberculosis.
Medical research has introduced new drugs into TB therapy, such as bedaquiline and delamanid. But MDR tuberculosis therapy remains a global challenge and has diminished hopes of eradicating tuberculosis, as we did with smallpox some 40 years ago. Today, only 56% of all MDR-TB patients worldwide are successfully treated.