Synopsis: 4. biotech: Virology: Viruses:


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or absence of Varroa and Nosema parasites and viruses identify and measure pesticide contaminants in hives

Of the seven common honeybee viruses in the United states and Europe the team only identified three species

The number of viruses present was correlated positively with Varroa levels but was not related to colony size.

and viruses the researchers recommend that beekeepers in East Africa maintain healthy bee populations by protecting vital nesting habitat


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That's why researchers at the Kansas State Veterinary Diagnostic Laboratory at Kansas State university have developed new tests they hope will mitigate the spread of these viruses.

Hesse says there are at least three viruses with similar symptoms affecting pigs two of which have entered the United states for the first time--porcine epidemic diarrhea virus and delta coronavirus.


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Although avian flu strain diversity often originates in wild birds it is the mixing of viruses among poultry pigs

and monitor the diversity of all avian flu viruses--not just those known to cause disease.

Understanding the natural diversity of viruses is critically important to identifying health risks. But authorities face a challenge both in focusing efforts in the right places

which borrows on approaches used by ecologists to estimate the diversity of flu viruses in a particular location.

Given that flu viruses can jump from domestic poultry to people ongoing efforts at improving biosecurity at poultry farms


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but wastewater carries microorganisms such as viruses bacteria and protozoa that can contaminate food and cause disease.

However normal cooking temperatures and food preservation strategies can reduce the risks posed by microorganisms and viruses.

and regulations for the reuse of wastewater they present only threshold concentrations for bacteria such as E coli not viruses.


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However the filter probably cannot trap most viruses which are much smaller in size. Karnik says his group now plans to evaluate the filtering potential of other types of sapwood.


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or a busy airport where cold viruses and other germs circulate freely flowers are common gathering places where pollinators such as bees


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history booksa new study reconstructing the evolutionary tree of flu viruses challenges conventional wisdom and solves some of the mysteries surrounding flu outbreaks of historical significance.

We now have a really clear family tree of theses viruses in all those hosts--including birds humans horses pigs

when and from where pandemic viruses emerged. Once you resolve the evolutionary trees for these viruses correctly everything snaps into place

and makes much more sense Worobey said adding that the study originated at his kitchen table.

And I had a glimmer of an idea that this would be important for our public health inferences about where these viruses come from

and eggs may be substantially shaping the diversity of these viruses in the wild over time spans of decades.


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and of those viruses account for almost half. History tells us about the devastation caused by the emergence of disease from wild hosts in disparate countries such as the Central american origin of the oomycete that led to The irish potato famine.

It's possible that other viruses that similarly appear to be very recent may in fact have a more ancient origin.


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That the major causes of annual losses include pests (e g. the Varroa mite) pathogens (e g. viruses that these mites carry) and the need for research and advancements in management techniques available for large-scale apiaries

the toll of agricultural intensification on this semi-free ranging managed species and the confounding pressure of viruses spread through Varroa mites and the burden of these viruses and mites at the individual bee and colony level.


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The routine screening of bees for frequent and rare viruses resulted in the serendipitous detection of Tobacco Ringspot Virus

Notably about 5%of known plant viruses are transmitted pollen and thus potential sources of host-jumping viruses.

As a result viruses such as TRSV generate a flood of variant copies with differing infective properties.

or weak TRSV and other viruses were more common in the weak colonies than they were in the strong ones.

TRSV was detected also inside the bodies of Varroa mites a vampire parasite that transmits viruses between bees while feeding on their blood.

The increasing prevalence of TRSV in conjunction with other bee viruses is associated with a gradual decline of host populations


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but the usual suspects (viruses and bacterial infections) didn't have anything to do with the poor health of the trees.


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if pesticides or viruses or something else is the cause for the colony decline. Even if you don't like honey,


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Trying to predict which of these viruses we ought to be worried most about. In the animal population there is a whole soup of flu viruses.

We are not good at determining which of those are most likely to jump into humans.

as compared to most other avian viruses, to transmit. Was there any overt indication that this strain of flu was more of a risk?

what viruses bind to. So there are signatures that avian viruses have that are associated with binding to those avian cells.

This virus is primarily avian still but it did have some signatures that we associate with mammalian virus. Where does this virus rank among the flu viruses we know about already?

I think it is more infectious than H5. It's probably more infectious than H9

But if we rank it highest amongst the avian flu viruses, what does that mean? The next leap is:

But flu viruses do change. If you give them enough opportunity they will adapt to a new host.

So we have quite a bit of immunity to the human flu viruses. And that probably stunts a lot of the ability of that virus to cause disease.

We group flu viruses into pathogenic types. Highly pathogenic or low pathogenic. Some viruses of the H5n7 type fall into a very virulent form.

And we know how they do this. They accumulate additional amino acids in their H protein. The H5n1 is one of these highly virulent forms.

Isn't that the case with most viruses? With any flu viruses there is a period

when you're infectious before you start to get clinical signs. With the H5 you eventually see sick birds.

But if you look at the pandemics we've seen they have all been from viruses of the H1, H2 and H3 type.

If we find viruses like the H7 that we perceive as high-risk then we start making viable vaccine strains.

but essentially you are protected only from a portion of these H1 viruses. And you are protected not against the H5 or H7.


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But what about viruses? The computer metaphor, though, is a reminder that there is no shortage of fools

and criminals ready to construct viruses and other harmful computer programs. If such people got interested in the biological world,


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and viruses were amenable to the technology and within reach of a startup. According to Hessel, individualized drugs could lower the cost of drug development across the entire spectrum of the development chain.


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