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Diphtheria: the story on HearLore | HearLore
Diphtheria
In the year 1735, a disease known as throat distemper swept through New England with such ferocity that in one New Hampshire town, 32 percent of all children under the age of ten perished. Families were not merely grieving; they were being systematically erased, with some losing three out of four children and others losing every single child to the same terrifying affliction. This was diphtheria, a bacterial infection caused by Corynebacterium diphtheriae that would haunt human history for centuries before its cause was ever understood. The disease earned its name from the Greek word diphthera, meaning leather, a reference to the thick, grey pseudomembrane that formed in the throats of the dying. This membrane was not merely a symptom; it was a physical barrier that slowly suffocated its victims, turning a simple sore throat into a death sentence by strangulation. Before the 19th century, the world had no name for this specific killer, referring to it variously as Boulogne sore throat in England or simply as a malignant throat infection, but the outcome remained the same: a slow, terrifying asphyxiation that left families in mourning and communities in terror.
The Discovery of the Invisible Killer
For centuries, physicians could see the leather-like membrane in a patient's throat but had no idea what caused it until the 1880s, when the invisible enemy was finally identified. In 1882, the Swiss bacteriologist Edwin Klebs first observed the rod-shaped bacterium inside the throat of a diphtheria patient, though he could not yet prove it was the cause of the disease. It was his colleague, the German bacteriologist Friedrich Loeffler, who in 1884 successfully cultured the organism and fulfilled Koch's postulates by reproducing the disease in animals. Loeffler discovered that the bacteria always resided in the mucous membranes of the larynx and trachea, and he was the first to suspect that the bacteria produced a poison that caused the symptoms. This poison, later named diphtheria toxin, was the true agent of destruction, not the bacteria themselves. The toxin was a protein of 60 kilodaltons that, once inside a human cell, would halt protein synthesis and kill the cell from the inside out. This mechanism of action, involving the ADP-ribosylation of elongation factor EF-2, explained why the disease could cause heart failure, nerve paralysis, and kidney damage long after the throat infection had seemingly healed.
The Horse Serum Revolution
The first true cure for diphtheria arrived not from a pill, but from the blood of horses, in a discovery that would win the first Nobel Prize in Physiology or Medicine. In 1890, Emil von Behring and Shibasaburō Kitasato demonstrated that serum from animals immunized with heat-treated diphtheria toxin could neutralize the poison in non-immunized animals. They had created the first antitoxin, a treatment that saved lives by neutralizing the toxin before it could bind to tissues. By 1894, human trials were successful, and the antitoxin became the standard of care, though the process was fraught with danger. The antitoxin was derived from horses, and the serum contained foreign proteins that could trigger severe allergic reactions known as serum sickness. In 1901, a tragedy in St. Louis saw ten of eleven inoculated children die from contaminated antitoxin, leading to federal regulation of biological products. Despite these early failures, the method was refined, and by the 1920s, the antitoxin was being produced in large quantities, saving millions of lives. The story of diphtheria treatment is a testament to the power of immunology, transforming a disease that killed 40 to 50 percent of untreated patients into a manageable condition.
What caused the 1735 New England diphtheria outbreak?
The 1735 New England diphtheria outbreak was caused by Corynebacterium diphtheriae bacteria. This bacterial infection resulted in the death of 32 percent of all children under the age of ten in one New Hampshire town.
Who discovered the diphtheria bacterium and when?
Swiss bacteriologist Edwin Klebs first observed the diphtheria bacterium in 1882. German bacteriologist Friedrich Loeffler subsequently cultured the organism in 1884 and identified the diphtheria toxin as the true agent of destruction.
How was the first diphtheria antitoxin developed?
Emil von Behring and Shibasaburō Kitasato developed the first diphtheria antitoxin in 1890 using serum from horses immunized with heat-treated diphtheria toxin. This treatment neutralized the poison before it could bind to human tissues.
What happened during the 1925 Nome Alaska diphtheria outbreak?
The 1925 Nome Alaska diphtheria outbreak required a relay of mushers and dogs to transport antitoxin over 674 miles in five days and five hours. Gunnar Kaasen and his lead dog Balto completed the final leg of the journey to save the town.
Why did diphtheria cases surge after 1991?
Diphtheria cases surged after 1991 due to falling vaccination rates in countries that were part of the Soviet Union following its collapse. As many as 200,000 cases were reported between 1991 and 1998, resulting in 5,000 deaths.
Which notable historical figures died from diphtheria?
Princess Alice and her daughter Princess Marie died of diphtheria in 1878, and Eleanor Roosevelt's mother Anna Hall Roosevelt died in 1892. Ruth Cleveland, the eldest daughter of former President Grover Cleveland, also died of diphtheria in 1904.
The transition from treating diphtheria to preventing it began in 1914, when William H. Park developed the first vaccine, a mixture of toxin and antitoxin known as TAT. This vaccine induced active immunity in humans, but it was not until 1926 that Alexander Thomas Glenny improved the process by treating the toxin with aluminum salts to create a toxoid. This modified version of the toxin was safer and more effective, leading to widespread vaccination campaigns in the 1930s. The impact was immediate and dramatic. In the United States, cases dropped from 4.4 per 100,000 inhabitants in 1932 to 2.0 in 1937. In contrast, Nazi Germany, which initially preferred treatment and isolation over vaccination, saw cases rise from 6.1 to 9.6 per 100,000 inhabitants during the same period. The vaccine became a cornerstone of public health, with the DPT vaccine, which also protected against pertussis and tetanus, being included in the World Health Organization's Expanded Programme on Immunization in 1974. Today, three or four doses of the vaccine are recommended during childhood, with booster doses every ten years, ensuring that diphtheria remains a rare disease in the developed world.
The Great Race of Mercy
In the winter of 1925, the remote town of Nome, Alaska, faced a diphtheria outbreak that threatened to wipe out its entire population. With the town cut off by snow and ice, the only hope for survival was a supply of diphtheria antitoxin stored in Anchorage, hundreds of miles away. The distance was too great for a single dog sled team to cover in time, so a relay of mushers and their dogs was organized. This relay, known as the Great Race of Mercy, saw the antitoxin transported over 674 miles in just five days and five hours, saving countless lives. The final leg of the journey was completed by a musher named Gunnar Kaasen and his lead dog, Balto, who delivered the serum to Nome. This event has since been celebrated as the Iditarod Trail Sled Dog Race, a testament to the power of human ingenuity and the importance of public health infrastructure. The story of Nome remains one of the most famous episodes in medical history, highlighting the critical role of rapid response and the devastating consequences of delayed treatment.
The Silent Resurgence
Despite the success of vaccination, diphtheria has not disappeared from the world. In the aftermath of the collapse of the Soviet Union in 1991, vaccination rates in its constituent countries fell so low that an explosion of cases occurred, with as many as 200,000 cases reported between 1991 and 1998, resulting in 5,000 deaths. The disease has re-emerged in various parts of the world, including Indonesia, Venezuela, and the United Kingdom, often in communities with low vaccination coverage. In 2015, 4,500 cases were officially reported worldwide, down from nearly 100,000 in 1980, but the threat remains. The disease is most common in sub-Saharan Africa, South Asia, and Indonesia, where children are most affected. In areas where it is still common, the mortality rate can reach 20 percent for children under five and adults over 40. The resurgence of diphtheria serves as a stark reminder of the fragility of public health achievements and the importance of maintaining high vaccination rates to prevent the return of a disease that once killed millions.
The Royal Tragedies
Diphtheria has left an indelible mark on history, claiming the lives of many notable figures, including members of European royalty. In 1878, Princess Alice, the second daughter of Queen Victoria, and her four-year-old daughter, Princess Marie, both died of diphtheria, leading the Sanitary Journal to warn readers of the kiss of death that may have spread the disease through the royal family. The disease also claimed the life of Eleanor Roosevelt's mother, Anna Hall Roosevelt, in 1892, and her brother, Elliott Roosevelt Jr., five months later. In 1904, Ruth Cleveland, the eldest daughter of former President Grover Cleveland, died of diphtheria at the age of 12. These tragedies highlighted the disease's ability to strike anyone, regardless of status, and underscored the need for effective prevention and treatment. The deaths of these prominent figures brought diphtheria into the public eye, driving efforts to improve public health and develop better medical interventions.