In 1959, parasitologist Reinhard Hoeppli proposed that a prescription in the Ebers papyrus – a medical text written around 1500 BCE – referred to the removal of a Guinea worm, an identification endorsed ten years later by the physician and Egyptologist Paul Ghalioungui; this would make the Ebers papyrus the oldest known description of the disease.
Carl Linnaeus included the Guinea worm in his 1758 edition of Systema Naturae, naming it Gordius medinensis. The name medinensis refers to the worm's longstanding association with the Arabian Peninsula city of Medina, with Avicenna writing in his The Canon of Medicine (published in 1025) "The disease is commonest at Medina, whence it takes its name". In Johann Friedrich Gmelin's 1788 update of Linnaeus's Systema Naturae, Gmelin renamed the worm Filaria medinensis, leaving Gordius for free-living worms. Henry Bastian authored the first detailed description of the worm itself, published in 1863. The following year, in his book Entozoa, Thomas Spencer Cobbold used the name Dracunculus medinensis, which was enshrined as the official name by the International Commission on Zoological Nomenclature in 1915. Despite longstanding knowledge that the worm was associated with water, the lifecycle of D. medinensis was the topic of protracted debate. Alexei Pavlovich Fedchenko filled a major gap with his 1870 publication describing that D. medinensis larvae can infect and develop inside copepods. The next step was shown by Robert Thomson Leiper, who described in a 1907 paper that monkeys fed D. medinensis–infected copepods developed mature Guinea worms, while monkeys directly fed D. medinensis larvae did not.
In the 19th and 20th centuries, dracunculiasis was widespread across nearly all of Africa and South Asia, though no exact case counts exist from the pre-eradication era. In a 1947 article in the Journal of Parasitology, Norman R. Stoll used rough estimates of populations in endemic areas to suggest that there could have been as many as 48 million cases of dracunculiasis per year. In 1976, the WHO estimated the global burden at 10 million cases per year. Ten years later, as the eradication effort was beginning, the WHO estimated 3.5 million cases per year worldwide.
Eradication
thumb|upright=1.4|Logarithmic scale of reported dracunculiasis cases 1989–2022 |alt=A graph shows the precipitous drop in Guinea worm cases over time.
The campaign to eradicate dracunculiasis began at the urging of the CDC in 1980. Following smallpox eradication (last case in 1977; eradication certified in 1981), dracunculiasis was considered an achievable eradication target since it was preventable with only behavioral changes and less common than many similar diseases of poverty. In 1981, the steering committee for the United Nations International Drinking Water Supply and Sanitation Decade (a program to improve global drinking water from 1981 to 1990) adopted the goal of eradicating dracunculiasis as part of their efforts. The following June, an international meeting termed "Workshop on Opportunities for Control of Dracunculiasis" concluded that dracunculiasis could be eradicated through public education, drinking water improvement, and larvicide treatments. In response, India began its national eradication program in 1983.
In 1986, the 39th World Health Assembly issued a statement endorsing dracunculiasis eradication and calling on member states to craft eradication plans. The same year, the Carter Center began collaborating with the government of Pakistan to initiate its national program, which then launched in 1988. By 1996, national eradication programs had been launched in nearly<!-- DRC is not in the list here, but the WHO fact sheet says it was endemic there, at least in the 1950s. It was not certified for eradication until 2022. --> every country with endemic dracunculiasis: Ghana and Nigeria in 1989; Cameroon in 1991; Togo, Burkina Faso, Senegal, and Uganda in 1992; Benin, Mauritania, Niger, Mali, and Côte d'Ivoire in 1993; Sudan, Kenya, Chad, and Ethiopia in 1994; Yemen and the Central African Republic in 1995.
Each national eradication program had three phases. The first phase consisted of a nationwide search to identify the extent of dracunculiasis transmission and develop national and regional plans of action. The second phase involved the training and distribution of staff and volunteers to provide public education village-by-village, surveil for cases, and deliver water filters. This continued and evolved as needed until the national burden of disease was very low. Then, in a third phase, programs intensified surveillance efforts to identify each case within 24 hours of the worm emerging and preventing the person from contaminating drinking water supplies. Most national programs offered voluntary in-patient centers, where those affected could stay and receive food and care until their worms were removed.
In May 1991, the 44th World Health Assembly called for an international certification system to verify dracunculiasis transmission eradication country-by-country. To this end, in 1995 the WHO established the International Commission for the Certification of Dracunculiasis Eradication (ICCDE). Once a country reports zero cases of dracunculiasis for a calendar year, the ICCDE considers that country to have interrupted Guinea worm transmission and entered the "precertification phase". If the country reports zero cases in each of the next three calendar years, the ICCDE sends a team to the country to assess the country's disease surveillance systems and to verify the country's reports. and Democratic Republic of the Congo in 2022. In 2020, the 76th World Health Assembly endorsed a new guidance plan, the Roadmap for Neglected Tropical Diseases 2021–2030, which set a 2027 target for eradication of dracunculiasis, which would enable certification by the end of 2030.<!-- Apparently an impossible goal at this point, with ~700 animal cases reported in 2025. -->
Due to the importance of animals as reservoirs for Guinea worm disease, a modified definition of worldwide eradication of dracunculiasis was adopted by the International Commission for the Certification of Dracunculiasis Eradication in 2023. The modified definition requires "the confirmed absence of the emergence of adult female worms in human beings for three consecutive years or longer at the global level" (emphasis added). In January 2026, the Carter Center reported approximately 700 cases detected in animals in 6 countries in 2025, primarily in Cameroon (445 cases), Chad (147) and Angola (70). The total had risen slightly in 2025 due to increases in Cameroon and Angola.