Sentences with phrase «species barrier»

These experimental combinations of genes cross the natural species barrier and have not been proven safe.

Annette Cotter: GE — or manipulation of organisms at a genetic level by crossing species barriers is an inherently risky business.

«For these viruses to jump species barriers they need a lucky genetic mutation combined with significant fluid exchange.

Prof. Lieve Gheysen, one of the researchers involved: «The natural presence of Agrobacterium T - DNA in sweet potato and its stable inheritance during evolution is a beautiful example of the possibility of DNA exchange across species barriers.

Kadriye Cosgun (Waskow, TUD)-- «Kit regulates HSC engraftment across the mouse human species barrier» (2013)

Especially genetic modification that crosses species barriers?

Those changes can make a virus all of a sudden jump a species barrier to infect humans.

HIV crossed the species barrier from SIV many generations ago in Africa from eating infected bushmeat.

AIDs jumped the species barrier from the simian version in the African jungle many many decades before the crisis hit the US.

Animals and Why They Matter: A Journey Around the Species Barrier.

It is certainly not a more efficient form of traditional cross-breeding, but rather a qualitatively different and risky technology which can cross the species barrier, which nature would never do.

The leading theory is that a technique for heat rendering of sheep parts that became mandatory in the 1970s somehow altered the scrapie prions enough to allow them to jump the species barrier and cause BSE.

The assumption that BSE could not cross the species barrier was proving increasingly uncertain.

That's a question a number of us around the world have been working on for many years: trying to sort out what controls that species barrier between people and pigs — in both directions.

Finally, the study finds that genetic changes associated with adaptation to a new host seen in other flu viruses that have breached the species barrier — such as the avian H5N1 flu strain — are not seen in the novel H1N1, suggesting that unknown changes in the new virus account for its ability to replicate and transmit in humans.

New research published in ASM's Applied and Environmental Microbiology shows that pathogens can also jump the species barrier to move from humans to animals.

Previously it was assumed that these viruses crossed the species barrier as a result of mutation or recombination with another pathogen.

Although there's no evidence that PK causes human disease, retroviruses are particularly worrisome candidates for crossing the species barrier, says virologist Jon Allen of San Antonio's Southwest Foundation for Biomedical Research.

«It appears to work across tissue and species barriers,» he says.

To test whether the Wolbachia were enforcing the species barrier, the researchers fed the wasps antibiotics dissolved in sugar water.

The supposedly immutable «species barrier» had finally been broken, at least in Darwin's own mind.»

When an evolving viral disease hops a species barrier, it can sometimes cause horrific infections.

A retrovirus that naturally infects many nonhuman primate species can easily jump the species barrier to humans and does so frequently among bushmeat hunters in Africa, according to a study published in the 19 March issue of The Lancet.

But others, such as famed evolutionary biologist Francisco Ayala of the University of California, Irvine, argue that P. reichenowi jumped the species barrier from chimps to humans quite recently and then became P. falciparum.

Short elements within a prion protein's sequence can cause it to activate and even cross the species barrier to spread neurodegenerative disorders such as Creutzfeldt - Jakob disease to humans

«Punishing cross-species mating by sterility or death would be a powerful evolutionary way to maintain a species barrier,» Haag said.

The big question was whether these strains were capable of spreading only in a limited, sporadic way from birds to humans — many of the cases were linked to poultry exposure — or if they had truly «jumped the species barrier.»

This observation implies that TMAdV possesses an inherent capacity to cross the species barrier and infect both humans and nonhuman primates.

Nevertheless, our discovery of TMAdV, a novel adenovirus with the capacity to cross species barriers, highlights the need to monitor adenoviruses closely for outbreak or even pandemic potential.

To cross the species barrier and establish themselves in the human population, influenza strains must acquire mutations that allow them to evade components of the human immune system, including, perhaps, the innate immune protein MxA.

«This gives us insight as to why some prions can't cross the species barrier while others can — as they have with mad cows and humans.,» says Lindquist.

The finding, reported in the December 20 issue of Proceedings of National Academy of Sciences, is particularly unsettling because it undermines the comforting presumption that a «species barrier» dramatically lessened the likelihood that people exposed to «mad cow» disease through meats, cosmetics, and medicinal supplies would be infected.

The species barrier refers to the relative lack of susceptibility of one species to prions derived from another species.

Here's how the virus possibly managed to jump the species barriers.

For example, Hepatitis B and Hepatitis C can only infect humans and chimpanzees, and although this species barrier prevents us from being susceptible to every infection out there, the flipside is that finding treatments for human infections can be extremely difficult.

Somewhere between 3 and 1.4 million years ago, HSV2 jumped the species barrier from African apes back into human ancestors — probably through an intermediate hominin species.

New research uses innovative data modelling to predict which species acted as an intermediary between our ancestors and those of chimpanzees to carry HSV2 — the genital herpes virus — across the species barrier.

GAINESVILLE — Eight Jacksonville racing greyhounds were killed by an equine influenza virus that jumped the species barrier from horses to dogs, University of Florida researchers announced Thursday.

In April 2004, a group of researchers at the University of Florida reported that preliminary findings suggested equine influenza virus had jumped the species barrier to dogs and caused a respiratory tract disease outbreak, killing eight Greyhounds in January 2004 at a track in Jacksonville, Fla..

In a press release, the nonprofit AKC - CHF singled out Breitschwerdt's innovative, leading - edge research in infectious disease research that, «has advanced our knowledge of deadly pathogens that cross species barriers, contributing to both canine and human health.»

However, since the 1990s, after outbreaks among nonhuman primates began to surface, many experts have been increasingly concerned that the rapidly mutating virus might soon be capable of jumping the species barrier.

Not only will individual animals often travel great distances to find unoccupied territories, they may also cross the species barrier as they do so.

A wolf will mate with both a dog AND a coyote, while finches leap across the species barrier at the drop of a hat.

No wonder it jumped the species barrier in such a dramatic way.

zooepidemicus are HORSE (equi) diseases that jumped the species barrier after MLV - modified (as in mutated or genetically engineered) live virus vaccines for horses were developed for those diseases.

His eventual goal is to find ways of «crossing the species barrier» between academics and the general public, to liberate the professional knowledge of attachment theory into the population at large.