Sentences with phrase «virus sequences from»

Chen and her colleague Guan - Zhu Han, an evolutionary biologist based at Nanjing Normal University, Nanjing, China, evaluated all dengue virus sequences from China available in the public database GenBank — about 1,000 - 4,000 samples each for the four dengue serotypes (DENV 1 - 4), for almost 10,000 total.

Not exact matches

Here's how it works: When a bacterium encounters DNA from a virus, it makes a strand of RNA, a molecular cousin to DNA, that matches the sequence of the viral DNA, known as a guide RNA.

Genetic sequencing by IAH scientists has, however, confirmed the two outbreaks sprung from the same virus, suggesting the culls and biosecurity measures failed to contain foot and mouth.

Many scientists also argue that destroying the stocks would do little to protect the world from smallpox, because it is now possible to recreate the virus from its genome, which was sequenced in 1994.

An analysis of the HPV16 genome from 5,570 human cell and tissue samples revealed that the virus actually consists of thousands of unique genomes, such that infected women living in the same region often have different HPV16 sequences and variable risks to cancer.

As is typical of newly isolated HIV viruses from Africa, the sequences did not match any HIV sequence then available on GenBank, the online database of genetic sequences maintained by the U.S. National Institutes of Health.

CDC, racing to sequence the virus from those infected, said it's seeing «slight changes» in its genetic makeup, but, said Besser, agency scientists don't know what that means.

Data from in vivo mouse models indicate that delivery of the DMAb sequence for the influenza A-targeted monoclonal antibody protected against lethal doses of two very different, clinically relevant influenza A viruses.

«Our genomes are packed with sequences derived from viruses that were inserted many thousands of years ago, and these virus - like sequences can move around, causing genetic mutations and contributing to the evolution of our genomes.

HPV is detected using a DNA analysis that looks for characteristic sequences from the 13 high risk strains of the virus in the cervical cell sample.

We also sequenced 35 samples from suspected EVD cases that tested negative for EBOV; genomic analysis identified other known pathogens, including Lassa virus, HIV - 1, enterovirus A, and malaria parasites (fig.

The authors analyzed changes in the viral sequence and conclude that the current outbreak probably resulted from the spread of the virus from central Africa in the past decade.

We used massively parallel viral sequencing to understand how and when EBOV entered human populations in the 2014 West African outbreak, whether the outbreak is continuing to be fed by new transmissions from its natural reservoir, and how the virus changed, both before and after its recent jump to humans.

We sequenced 99 Ebola virus genomes from 78 patients in Sierra Leone to ~ 2000 × coverage.

Unlike the previous studies that focused on certain species or a particular RNA virus, Skalka went broad: She and her colleagues surveyed every vertebrate genome available, 48 in all, and looked for hints of 5666 RNA viral sequences from 38 known families and nine genera that were unclassified.

However, they identified genetic sequences matching viruses that infect dogs, chickens, and pigs, suggesting the possibility that some of the viruses had crossed over from other species.

The researchers compared the HSV - 1 and HSV - 2 gene sequences to the family tree of simplex viruses from eight monkey and ape host species.

When the researchers expanded their search to include all the data from the Human Microbiome Project, a large - scale project to sequence the DNA of all the microbes that live in and on our bodies, they found that the same virus was present in 73 per cent of all 466 human faecal samples.

A team of researchers from the United Kingdom has obtained the first complete genome sequence of Zika virus that was isolated from a semen sample.

Quintana - Murci and colleagues used RNA - sequencing to characterize the way that immune cells, known as primary monocytes, derived from 200 people of self - reported African or European ancestry would respond to attack by a bacteria or a virus.

In rapid - fire sequence he jumps from scientific minutiae to grand political comparisons (viruses, bacteria, oncogenes, even researchers who study these entities can be transformed into Goebbels or «good Germans»), and then he might toss in an entirely new idea before returning to his original topic — all within seconds.

We analyzed 7.2 terabases of metagenomic data from 243 Tara Oceans samples from 68 locations in epipelagic and mesopelagic waters across the globe to generate an ocean microbial reference gene catalog with > 40 million nonredundant, mostly novel sequences from viruses, prokaryotes, and picoeukaryotes.

The successful isolation of Zika virus from this semen sample allowed the investigators to sequence the virus, resulting in the first genome of Zika virus isolated from semen.

Using a specially designed computational tool as a lure, scientists have netted the genomic sequences of almost 12,500 previously uncharacterized viruses from public databases.

Genome sequencing of specimens from both Canada and Mexico will help us to understand if the virus has mutated which may help us to explain the increased severity of the cases in Mexico.

They extracted and sequenced RNA from 41 strains of HIV as well as 61 strains of hepatitis C virus infecting the children.

The finding doubles the number of recognized virus genera — a biological classification one step up from species — and increases the number of sequenced virus genomes available for study almost tenfold.

But the genome sequences revealed in this study suggest that there are many more prophage - like viruses that are different in one important respect: Their genome remains separate from their microbial hosts» genome.

Lipkin then used a rapid genome - sequencing technique to identify RNA from a variety of bacteria, fungi, and viruses.

The CRISPR - Cas system protects bacteria from invaders such as viruses by creating small strands of RNA called CRISPR RNAs, which match DNA sequences specific to a given invader.

And a new prototype device can display a fluorescent letter in the presence of nucleic acid sequences from the Ebola virus or the closely - related Marburg virus: «E» for Ebola or «M» for Marburg.

These results appear only now, months after the peak of the outbreak, because sequencing Zika virus has proved to be challenging, particularly directly from patient samples.

To narrow down this time window, Whitfield studied sequences of three genes from 28 species of wasps — some virus - carriers and some not — and used differences among the species to build a family tree.

With the aid of advanced gene sequencing, comparative DNA analysis, and endless cross-referencing of the genomes of organisms from the three — or perhaps four — domains of life, a fuller concept of viruses and their role in evolution has begun to coalesce.

In the past two years, genetic sequence information of the flu - virus protein hemagglutinin from only two influenza strains from India has been deposited into publicly available influenza databases, making it difficult to determine exactly which strain is causing the new outbreak, and how it differs from previous strains.

We are nowhere near being able to predict from a flu virus's genetic sequence whether it will be transmissible or virulent, and our surveillance of flu strains in the wild is extremely limited.

But this month, researchers reported that the instruments passed an important field test, conducting on - the - spot sequencing of viruses isolated from patients during last year's Ebola epidemic in West Africa.

«Amazingly fast, cheap genome sequencing: Zika virus mosquito genome assembled from scratch.»

Thirty - one years ago, Gould and Vrba suggested that repetitive DNA sequences known as transposons, which originated from viruses, might serve no direct function at first, but may be used to great advantage later on.

A multi-institutional team has sequenced the genome of the mosquito that transmits the Zika virus uisng a new way to sequence the genome of an organism entirely from scratch, dramatically cheaper and faster.

Glenn Browning at the University of Melbourne in Australia and colleagues sequenced the viruses and found that they arose when the European strain acquired genes from the Australian strains.

From its sequence, researchers already knew that the 1918 HA gene resembled that of avian flu viruses.

Preliminary sequencing of virus isolates from Reunion at the Pasteur Institute in Lyon, France, suggests that the virus was imported from East Africa, says Pasteur virologist Nathalie Pardigon.

When the team sequenced these regions and compared them to those from SFV strains isolated from a wide variety of different species, they discovered that one person had most likely been infected with an SFV strain from a gorilla, one with a mandrill strain, and the third with a virus from a monkey species called De Brazza's guenon.

In response to growing criticism about the lack of access to influenza data, the Centers for Disease Control and Prevention (CDC) in Atlanta, Georgia, on 22 August made public the sequence of more than 650 genes from flu viruses isolated in the United States.

Even so, sequences of the virus have been published just twice, in March of 2014 (using samples from Guinea) and in June of 2014 (using samples from Sierra Leone).

They had also sequenced the virus directly from samples taken from the patient and the camel — and those two were also 100 % identical.

The Saudi scientists said they had isolated a virus from the patient as well as from one of the camels, grown both samples in monkey kidney cells, and sequenced their genomes, which turned out to be 100 % identical.

Together the pieces represented about 15 % of the camel virus genome and these parts were almost identical to the genome sequenced from the patient.

In nature, bacteria use DNA snippets from viruses to form CRISPR sequences to fight viral infections.