World Bulletin / News Desk
Three vaccines used to prevent respiratory disease in chickens have swapped genes, producing two lethal new strains that have killed tens of thousands of fowl across two states in Australia, scientists reported on Friday.
The creation of the deadly new variant was only possible because the vaccines contained live viruses, even though they were weakened forms, said Joanne Devlin, lead author of the paper published in the journal Science.
Devlin and her team discovered how closely related the two new strains were with viruses in the vaccines after analysing their genes.
"What we found was the field viruses ... were actually a mixture of the genomes from different vaccine viruses," said Devlin, a lecturer at the University of Melbourne's School of Veterinary Science. "They actually combined, mixed together."
The viruses emerged in 2008, a year after Australia started using a European vaccine along with two very similar Australian vaccines to fight acute respiratory disease in poultry. The illness causes coughing, sneezing and breathing difficulties in birds, normally killing 5 percent of them.
The two new strains, however, were far more harmful, and since they were created have killed up to 17 percent of chicken flocks across Victoria and New South Wales, the two main chicken rearing states in Australia.
"What could have happened was one chicken was vaccinated with one vaccine and later was exposed to the other vaccine somehow, from nearby chickens," Devlin said.
Agricultural authorities in Australia have been informed of the results of the study, and are considering how to prevent similar cross-overs happening again.
"Use of only one vaccine in a population of birds will prevent different viruses from combining," Devlin said.
"Authorities are reviewing labels on vaccine to change the way vaccines are used and prevent different vaccines being used in one population."
Qualcomm also sued by US, Korean regulators for apparent demand of royalties for their chip technology
Uber has recently stopped using an outside partner for financing vehicles in favor of an in-house program to better oversee the process.
Research finds 4.5-billion-year-old moon formed few million years after Earth
In Europe, green cars benefit increasingly from subsidies, tax breaks and other perks, while combustion engines face mounting penalties including driving and parking restrictions.
Automation has transformed the productivity of manufacturing since industrial robots first started painting, cutting, welding and assembling in the 1960s.
The Marines's version of the plane, known as the F-35B, is capable of conducting short takeoffs and vertical landings.
An unmanned SpaceX Falcon 9 rocket exploded September 1 in Cape Canaveral, destroying a satellite that Facebook planned to use to beam high-speed internet to Africa.
English, Chinese versions removed following government request
Scientists at the University of California, Berkeley, and the University of York, England, corroborated the results of the National Oceanic and Atmospheric Administration's (NOAA) research paper in 2015.
The South Korean automaker wants to stand out by being ordinary: making a self-driving car for the average consumer.
New $100 billion fund initiated by Japanese bank finds supporters in Foxconn, Saudi Arabia and Oracle
Turmaks establishes a facility to produce silicopolymer recycling technology in the Netherlands
The rocket is set to blast off from the southern spaceport of Sriharikota in February carrying three Indian satellites and 100 foreign ones including from the US, France and Germany, the Press Trust of India said.
A new design takes on Tesla surpassing key benchmarks
The factory will make large-screen liquid crystal displays (LCD), the firm said at an event in the Chinese city on Friday. It will be operational by 2019.