Tag: "strains" at biology news

Viral marker of human migration suspect

...Disease Dynamics. "But, in the case of this virus, strains from European communities appear to be the most divergent." The human polyomavirus, or JCV, is a small double-stranded DNA virus that is thought to be primarily transmitted from parents to their children. Infection is usually asymptomatic unless ...

New finding points way to foiling anthrax's tricks

...heir host so that the bacteria can reproduce. Some strains of E. coli produce more than one kind of sideropho...he gut, such as Salmonella enterica and pathogenic strains of E. coli. These two bacteria also contain a second siderophore, aerobactin, with a molecular struc...

Beauty and the brain

... when it comes to human faces, Winkielman said, it strains credulity when applied to inanimate objects or animals of a different species, which we are presumably not assessing for reproductive purposes. So Winkielman, with colleagues from the University of Otago, New Zealand, and the University of Denver,...

Solved: The mystery of flesh-eating bacteria's relentless attack

...ure," said Hanski. This may be one reason why some strains are less virulent than others; they might make mor...to study the amount of SilCR produced by the other strains and to determine their degree of tissue invasiveness." said Hanski. The link between SilCR and a h...

Fire ant-attacking fly spreading rapidly in Texas

... sites. In addition to Brazilian and Argentinean strains of P. tricuspis, two other phorid species were introduced since 2004, and Gilbert says the smallest one, P. curvatus, is also on the march. Gilbert says these initial successes should be seen as "getting to first base" in the attempt to control re...

Gut reaction: Researchers define the colon's genome

...rs conclude that the human GI tract hosts multiple strains of B. longum , and a majority of its archaeal species is related M. smithii. How many unique bacterial genera or species exist in the colon community? By comparison to the outside world, Gill suspects the human gut is at least as complex as our soi...

St. Jude test of bird flu vaccine proves successful

...ts provided significant protection against several strains of human influenza virus as well as the H5N1 "bird flu" strain. "Such cross-protection against bird and human influenza is considered by researchers to be the 'Holy Grail' of flu vaccines," Webby said. "By stimulating immune responses against targe...

Mayo Clinic Cancer Center: Harnessing the measles virus to attack cancer

...ry and in several animal models that measles virus strains can significantly shrink glioma tumors and prolong...unique in its pursuit of oncolytic measles vaccine strains for cancer treatment, and the research has grown from the most basic laboratory science to the sophi...

MRSA vaccine shows promise in mouse study

...mals from multiple disease-causing, drug-resistant strains of Staphylococcus aureus, the most common cause of...cademy of Sciences, available early online. These strains include USA100, a common cause of hospital-acquired infections, and USA400, a virulent community-ass...

No-mow grass may be coming to your yard soon

...more precise methods for altering industrial plant strains have come into play. But access to a pathway used by plant hormones to dictate size promises broader influence over the many genes involved in the process of growth. Levers that could be used to alter a hormone pathway to influence plant developmen...

Trials for new drug to overcome HIV

...ected human cells have shown that the drug defeats strains of HIV which are resistant to other anti-HIV drugs. A small human trial of the drug, reported last August, showed that when given on its own it rapidly clears most HIV from the blood, driving down the levels tenfold in a matter of hours. The trial p...

Potato blight pathogenicity explained by genome plasticity

... the pathogen responsible for potato blight. Some strains of the pathogen possess multiple copies of a specific gene, while other strains possess only a single copy. Certain potato plants do not recognize strains of the pathogen with onl...

Innovative method for creating a human cytomegalovirus vaccine outlined

...ate selected elements from several human rotavirus strains into a bovine rotavirus backbone. The vaccine that resulted takes advantage of the immunological characteristics of both the human and bovine viruses. This approach is conceptually similar to Maul's strategy for developing a CMV vaccine, although the...

DNA to the defense

...ts an unrivalled capacity for new immune-resistant strains of African trypanosomes." Analysis of the genome sequence of T. brucei was published just last year, amid increasing calls for research into new control strategies for this neglected disease. The current study underscores this parasite's reputat...

Transgenic goat's milk offers hope for tackling children's intestinal disease

...hat were fed milk from non-transgenic goats. Some strains of E. coli can cause severe intestinal illness. However, the kid goats fed lysozyme-rich goat's milk, had higher levels of coliform bacteria and roughly the same level of E. coli, compared to control group. Both the kid goats and the young pigs ...

Experimental vaccine protects lab animals against several strains of H5N1

...irulence, and vaccines based on less-virulent H5N1 strains have so far been relatively poor stimulators of immunity in human trials. In the study, the ferrets were vaccinated intramuscularly with one or two doses of vaccine. Both schedules induced a protective antibody response, but the two-dose schedule i...

New bird flu drug promises to beat the problem of resistance

... world's first anti-flu drug effective against all strains of flu. Dr McKimm-Breschkin was part of the team that developed Relenza which remains one of only two drugs considered effective treatments against avian influenza, and she has also carried out much of the research on influenza drug resistance. Ho...

HIV-1's high virulence might be an accident of evolution

...ected with the virus. While infection with related strains of "simian immunodeficiency virus" (SIV) is simila...chimpanzees--is the more virulent of the two human strains and the source of the majority of HIV infections throughout the world. The less pathogenic HIV-2 evo...

Ready, set, mutate?and may the best microbe win

...pan of 1,500 generations, the percentage of mutant strains inside the fermentor ebbed and flowed as the singl...ss. The researchers sampled the fermentor for new strains every other day. Though millions of mutations in the target gene are believed to have occurred, only...

HIV infection requires an accomplice: B cells with special protein direct HIV to T cells

...or both of two other receptors, from which the two strains of HIV, X4 and C5, take their names. Once anchored on the membrane, it's able to slither inside and take command of the cell. But as the Pitt studies have found, there is an important first step in a new pathway involving B cells that express a prote...

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