*Warning comes after man died from a Sars-like virus that had previously only been seen in bats
*Earlier this month a man from Glasgow died from a tick-borne disease that is widespread in domestic and wild animals in Africa and Asia
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The symptoms appear suddenly with a headache, high fever, joint pain, stomach pain and vomiting.
As the illness progresses, patients can develop large areas of bruising and uncontrolled bleeding. In at least 30 per cent of cases, Crimean-Congo Viral Hemorrhagic Fever is fatal.
And so it proved this month when a 38-year-old garage owner from Glasgow, who had been to his brother’s wedding in Afghanistan, became the UK’s first confirmed victim of the tick-borne viral illness when he died at the high-security infectious disease unit at London’s Royal Free Hospital.
It is a disease widespread in domestic and wild animals in Africa and Asia — and one that has jumped the species barrier to infect humans with deadly effect.
But the unnamed man’s death was not the only time recently a foreign virus had struck in this country for the first time.
Last month, a 49-year-old man entered London’s St Thomas’ hospital with a raging fever, severe cough and desperate difficulty in breathing.
He bore all the hallmarks of the deadly Sars virus that killed nearly 1,000 people in 2003 — but blood tests quickly showed that this terrifyingly virulent infection was not Sars. Nor was it any other virus yet known to medical science.
Worse still, the gasping, sweating patient was rapidly succumbing to kidney failure, a potentially lethal complication that had never before been seen in such a case.
As medical staff quarantined their critically-ill patient, fearful questions began to mount. The stricken man had recently come from Qatar in the Middle East. What on earth had he picked up there? Had he already infected others with it?
Using the latest high-tech gene-scanning technique, scientists at the Health Protection Agency started to piece together clues from tissue samples taken from the Qatari patient, who was now hooked up to a life-support machine.
The results were extraordinary. Yes, the virus is from the same family as Sars. But its make-up is completely new. It has come not from humans, but from animals. Its closest known relatives have been found in Asiatic bats.
The investigators also discovered that the virus has already killed someone. Searches of global medical databases revealed the same mysterious virus lurking in samples taken from a 60-year-old man who had died in Saudi Arabia in July.
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When the Health Protection Agency warned the world of this newly- emerging virus last month, it ignited a stark fear among medical experts.
Could this be the next bird flu, or even the next ‘Spanish flu’ — the world’s biggest pandemic, which claimed between 50 million and 100 million lives across the globe from 1918 to 1919?
In all these outbreaks, the virus responsible came from an animal. Analysts now believe that the Spanish flu pandemic originated from a wild aquatic bird.
The terrifying fact is that viruses that manage to jump to us from animals — called zoonoses — can wreak havoc because of their astonishing ability to catch us on the hop and spread rapidly through the population when we least expect it.
One leading British virologist, Professor John Oxford at Queen Mary Hospital, University of London, and a world authority on epidemics, warns that we must expect an animal-originated pandemic to hit the world within the next five years, with potentially cataclysmic effects on the human race.
Such a contagion, he believes, will be a new strain of super-flu, a highly infectious virus that may originate in some far-flung backwater of Asia or Africa, and be contracted by one person from a wild animal or domestic beast, such as a chicken or pig.
By the time the first victim has succumbed to this unknown, unsuspected new illness, they will have spread it by coughs and sneezes to family, friends, and all those gathered anxiously around them.
Thanks to our crowded, hyper-connected world, this doomsday virus will already have begun crossing the globe by air, rail, road and sea before even the best brains in medicine have begun to chisel at its genetic secrets. Before it even has a name, it will have started to cut its lethal swathe through the world’s population.
If this new virus follows the pattern of the pandemic of 1918-1919, it will cruelly reap mass harvests of young and fit people.
They die because of something called a ‘cytokine storm’ — a vast overreaction of their strong and efficient immune systems that is prompted by the virus.
This uncontrolled response burns them with a fever and wracks their bodies with nausea and massive fatigue. The hyper-activated immune system actually kills the person, rather than killing the super-virus.
Professor Oxford bases his prediction on historical patterns.
The past century has certainly provided us with many disturbing precedents. For example, the 2003 global outbreak of Sars, the severe acute respiratory syndrome that killed nearly 1,000 people, was transmitted to humans from Asian civet cats in China.
In November 2002, it first spread among people working at a live animal market in the southern Guangdong province, where civets were being sold.
Nowadays, the threat from such zoonoses is far greater than ever, thanks to modern technology and human population growth. Mass transport such as airliners can quickly fan outbreaks of newly- emerging zoonoses into deadly global wildfires.
The Sars virus was spread when a Chinese professor of respiratory medicine treating people with the syndrome fell ill when he travelled to Hong Kong, carrying the virus with him.
By February 2003, it had covered the world by hitching easy lifts with airline passengers. Between March and July 2003, some 8,400 probable cases of Sars had been reported in 32 countries.
It is a similar story with H1N1 swine flu, the 2009 influenza pandemic that infected hundreds of millions throughout the world. It is now believed to have originated in herds of pigs in Mexico before infecting humans who boarded flights to myriad destinations.
Once these stowaway viruses get off the plane, they don’t have to learn a new language or new local customs.
Genetically, we humans are not very diverse; an epidemic that can kill people in one part of the world can kill them in any other just as easily.
On top of this, our risk of catching such deadly contagions from wild animals is growing massively, thanks to humankind’s relentless encroachment into the world’s jungles and rainforests, where we increasingly come into contact for the first time with unknown viral killers that have been evolving and incubating in wild creatures for millennia.
This month, an international research team announced it had identified an entirely new African virus that killed two teenagers in the Democratic Republic of the Congo in 2009.
The virus induced acute hemorrhagic fever, which causes catastrophic widespread bleeding from the eyes, ears, nose and mouth, and can kill in days.
A 15-year-old boy and a 13-year-old girl who attended the same school both fell ill suddenly and succumbed rapidly. A week after the girl’s death, a nurse who cared for her developed similar symptoms. He only narrowly survived.
The new microbe is named Bas-Congo virus (BASV), after the province where its three victims lived. It belongs to a family of viruses known as rhabdoviruses, which includes rabies.
A report in the journal PLoS Pathogens says the virus probably originated in local wildlife and was passed to humans through insect bites or some other as-yet unidentified means.
There are plenty of other new viral candidates waiting in the wings, guts, breath and blood of animals around us. You can, for example, catch leprosy from armadillos, which carry the virus in their shells and are responsible for a third of leprosy cases in the U.S.
Horses can transmit the Hendra virus, which can cause lethal respiratory and neurological disease in people.
In a new book that should give us all pause for thought, award-winning U.S. natural history writer David Quammen points to a host of animal-derived infections that now claim lives with unprecedented regularity. The trend can only get worse, he warns.
Quammen highlights the Ebola fever virus, which first struck in Zaire in 1976. The virus’s power is terrifying, with fatality rates as high as 90 per cent. The latest mass outbreak of the virus, in the Congo last month, is reported to have killed 36 people out of 81 suspected cases.
According to Quammen, Ebola probably originated in bats. The bats then infected African apes, quite probably through the apes coming into contact with bat droppings. The virus then infected local hunters who had eaten the apes as bushmeat.
Quammen believes a similar pattern occurred with the HIV virus, which probably originated in a single chimpanzee in Cameroon.
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