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November 28, 2018
Two international agencies are urging countries to remain vigilant about the possible re-emergence of the deadly cattle disease Rinderpest.
Rinderpest was declared eradicated in 2011, making it the first animal disease to be eliminated in the history of humankind. For centuries, Rinderpest caused the death of millions of cattle, buffaloes, yaks and wild animals, leading to famine and starvation, according to the U.N. Food & Agriculture Organization (FAO) and the World Organization for Animal Health (OIE).
FAO and OIE are now calling on countries to eliminate the last Rinderpest virus samples still being held in some laboratories around the world. To maintain global freedom from Rinderpest and prevent any reintroduction of the disease, the two agencies have developed a Global Action Plan that is meant to be guiding material for countries that outlines the responsibilities of all involved to maintain the eradication.
"Eradicating Rinderpest has made a major contribution to food security and nutrition around the world, and we have to work to together to maintain that," said Bukar Tijani, FAO assistant director-general, agriculture and consumer protection department. "We have to be vigilant and make sure we have the capacity to take fast action if, for any reason, it reappears."
"The current Rinderpest's absence in the field actually means livestock herds would be highly vulnerable in case of its re-emergence, wreaking significant disruption and damage to food safety and food security throughout the world," Matthew Stone, OIE deputy director general in charge of international standards and science, said.
The two agencies said the global action plan encompasses five phases: preparation, prevention, detection, response and recovery. As Rinderpest has been eradicated, the action plan to address the risk of re-emergence is distinct from other plans targeting transboundary animal diseases.
That entails keeping front-line actors aware of the disease and the possibility of its re-emergence, FAO and OIE said. Several actions have already been put in place to meet this objective, such as the "Never Turn Back" OIE communication campaign targeting laboratory staff, veterinary practitioners and veterinary students.
The global plan also entails optimizing capacity to make diagnostic tools and vaccines available if needed and a coordinated emergency plan that can be immediately activated upon the first confirmed case, assuring both a rapid return to global freedom from the disease and necessary support for affected livelihoods, FAO and OIE added. All of these phases need attention at the national, regional and international level.
Getting rid of what's left
One reason that diagnostic and vaccine capacities for Rinderpest are low is that the eradication campaign put a ban on using the virus except in highly controlled experiments supervised by OIE and FAO.
However, there are still some institutes around the world holding Rinderpest virus material — including vaccines from the past, the agencies said. These samples need to be either destroyed or moved to safe laboratories. By contrast, samples of the smallpox virus, the only other infectious disease to have been formally eradicated, exist in just two designated secure storage zones.
Ideally, countries might opt to destroy their virus holdings, and FAO and OIE run a program to help them do this. The two organizations also support key institutions where samples — which might be useful to derive vaccines in an emergency — can be safely stored. Alternatively, countries might upgrade their holding facilities to conform with FAO and OIE supervision protocols.
So far, however, progress in eliminating residual holdings has been slow, the agencies said. Only in the African Union has there been a regional agreement to sequester all virus samples in a single selected facility.
What was eradicated
Rinderpest, sometimes called cattle plague or steppe murrain, has been a scourge for millennia and has killed millions of animals, including some wild species. It is part of a group of viruses that includes canine distemper, peste des petits ruminants and measles in people.
After wreaking havoc in Europe and Asia for centuries, colonial invasions brought the disease to Africa, where it wrought vast damage in the late 19th century, decimating pastoralist communities, rearranging ecosystems and often facilitating colonial occupation of lands. Its eradication saves the continent losses of $920 million per year, according to FAO estimates.
A vaccine was created in the mid-20th century, but it took a few more decades to develop a version that could survive temperature variations in tropical countries. Pastoralists themselves played a critical role in the eradication campaign, thanks to their deep local knowledge and willingness to travel to remote areas in adverse circumstances.
FAO and OIE are using the successful Rinderpest eradication program as a model for a new campaign to rid the world of peste des petits ruminants, which affects sheep and goats and causes up to $2.1 billion a year in losses, mostly shouldered by small-scale farmers.
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