Multiple gene-swapping events brought them together in a single killer strain, say the researchers; improving surveillance in humans and in swine could alert scientists to such events early in the future.
the team broke the virus down and inserted genes from the killer strain, one at a time, into a related but benign bird influenza virus that normally infects only the lungs of mice.
After all, ensuring that our government does its job means we can all rest a little easier knowing we have systems in place to protect us from the next threat to the public health -- be it an outbreak of contaminated food or a killer strain of the flu.
Scientists are largely in the dark about how to stop or treat the slew of never-seen-before global health problems of recent years, from the emergence of the deadly MERS virus in Saudi Arabia, to a new killer strain of bird flu in China and an unprecedented Ebola outbreak in West Africa.
The membrane bioreactor made it possible to carry out mixed killer/sensitive fermentations with a double physiological characterization of both killer and sensitive strains.
Since the first discovery of killer toxin-secreting strains of Saccharomyces cerevisiae [ 3], yeast killer phenomenon has been documented in many different yeast species and genera from the environment, including Wickerhamomyces anomalus (previously known as Pichia anomala and Hansenula anomala) and Aureobasidium pullulans [ 4– 9].
Mr. Brezhnev was convinced that President Nixon was trying to trick him, so he ordered creation of the Biopreparat program in the Soviet Union, which weaponized anthrax and mutant strains of killer viruses, including smallpox.
Although false negatives are possible (if our primers failed to amplify a novel strain), our screen would have detected known insect Spiroplasma strains, including male-killers and non-male-killers.
Nor was the Spiroplasma found in the D. melanogaster female a male-killer, as the strain was established in culture and yielded infected flies of both sexes.
On October 13th a study published in Science Translational Medicine revealed that early-stage trials show a new tuberculosis vaccine may work against drug-resistant strains of that killer disease.Yet vaccines are an inherently risky business.
