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Tag: "virulent" at biology news

Taking Aim With Nanoparticle PEBBLEs

...aging preliminary results using PEBBLEs to treat a virulent form of brain cancer in rats. PEBBLEs are polymer spheres, typically 20 to 200 nanometers in diameter—about the size of a virus. The spheres carry an assortment of molecules on their surfaces, some to guide the PEBBLEs to their targets inside the bo...

NYC's First Rapid HIV Drug-resistant AIDS Case Prompts Call to Step Up HIV Prevention

...this individual has contracted a new, particularly virulent strain of HIV that swiftly advanced to AIDS in just a few short months," said Charles Farthing, MD, AIDS Healthcare Foundation's Chief of Medicine. "Unfortunately, it also seems that few of the AIDS treatments currently available today can be used in...

The Bacteria's guide to survival

...his can pose a problem. If the bacteria are highly virulent and induce too much cell death, they could take down their host before they're able to jump ship, thus hurting the bacteria's chances of survival in the long run. Reporting in the open-access journal PLoS Biology, Magdalene So and colleagues present...

New Drugs For Bad Bugs: UF Approach Could Bolster Antibiotic Arsenal

...usly treatable diseases could again emerge in more virulent forms. Public health officials cite antibiotic resistance as a growing problem for a host of diseases, from childhood ear infections to malaria. Last year, the FDA published a report calling attention to inefficiencies in the drug and medical produc...

Study reveals dramatic difference between breast cancers in US and Africa

...cestry are more likely to be diagnosed with a more virulent form of the disease than women of European ancestry. Researchers from the University of Chicago, working with colleagues at the University of Calabar in Nigeria and the University of North Carolina, found that breast cancers in African women produce...

Ebola virus: from wildlife to dogs

...c of Congo belongs to the most widespread and most virulent of the four known Ebola sub-groups, the Zaire sub-type, which exists in several strains. ...

Research Reveals Functions Of Harmful Shellfish Pathogens

... of V. vulnificus in oysters suggests that strains virulent to humans may be more invasive to--and persistent in--oysters. The Dover center, a field location of the ARS Eastern Regional Research Center in Wyndmoor, Pa., also studies methods to detect norovirus and the hepatitis A virus in shellfish. It also ...

Understanding how bacteria communicate may help scientists prevent disease

...biofilm formation, releasing toxins, or becoming a virulent invader," said Rahul Kulkarni. While Kulkarni work...s or short-circuiting bacteria's ability to become virulent by disturbing their communication network so they remain harmless, is an alternative strategy to con...

Studies reveal how plague disables immune system, and how to exploit the process to make a vaccine

...fectious Diseases Research (GLRCE). "It's the most virulent bacterial organism known to mankind. But we now know a little more about how it exercises those powers and we think we can use that knowledge to prepare a preemptive strike." Historically, the terms "plague" or "Black Death" have referred to the bub...

Scientists take aim at virulent bacteria by decoding machinery of key control enzyme

...er to designing a new kind of drug that could stop virulent bacterial infections in their tracks. Their research will be published in the May 6 issue of the journal Cell. Scientists have known for many years that an enzyme called Dam (DNA adenine methyltransferase) plays a role in regulating gene expression ...

Most common lung cancers may begin in newly discovered cells

...idence that some human cancers contain a small but virulent group of cells known as "cancer stem cells" that regenerate the tumor, a capacity that most cells in a tumor lack. "They may be the cells that we have to eliminate in cancer in order to obtain durable cures for the disease," said Jacks. "Along the w...

Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses

...at was briefly used as a live vaccine against more virulent tick-borne encephalitis viruses in Russia but caused encephalitis complications in about 1 of every 10,000 people. Interferon, the body's first defense against many viruses, triggers a cascade of immune defenses. According to researchers at NIAID's ...

Virologist finds contagious equine flu in dogs

...test to see if it was an avian flu virus, like the virulent H5N1 that has jumped from birds to humans over the last few years. A highly sensitive test -- called a PCR (polymerase chain reaction) that amplifies and detects small amounts of DNA or RNA in a blood or tissue sample -- ruled out avian flu strains H...

Mass production of human papillomavirus could lead to gains against cervical cancer

...cancers and some skin cancers. A more common, less virulent form of the virus causes genital warts. Using the new technique scientists can quickly produce a thousand times more infectious virus per culture dish than they could using conventional methods. Researchers are hopeful that this advance could lead t...

Monkeypox mystery: New research may explain why 2003 outbreak in the US wasn't deadly

...s conclude that some strains of monkeypox are more virulent than others, depending on where in Africa the virus came from. "We have at least two biological strains of monkeypox virus - one on the west coast of Africa, and the other in the Congo basin," Buller said. "The 2003 outbreak in the United States was...

Bacteria recognize antimicrobials, respond with counter-defenses

...ople. Some food science institutes anticipate that virulent strains of salmonella will become more common throughout the food chain. Learning how this sometimes deadly organism fights back against the immune system may lead to treatments that get around bacterial resistance. Work in this area may also sugges...

Less virulent strains of avian influenza can infect humans

...l with human strains, which could result in a more virulent virus. Researchers in Italy studied outbreaks that occurred among poultry between 1999 and 2003, to determine the risk of avian influenza virus transmission to persons in contact with the animals. The outbreaks occurred in northern Italy in regions...

Transplanting Animal Organs Could Soon Be A Reality

...l with human strains, which could result in a more virulent virus. Researchers in Italy studied outbreaks that occurred among poultry between 1999 and 2003, to determine the risk of avian influenza virus transmission to persons in contact with the animals. The outbreaks occurred in northern Italy in regions...

First Whole Genome Map of Genetic Variability in Parkinson’s Disease

...l with human strains, which could result in a more virulent virus. Researchers in Italy studied outbreaks that occurred among poultry between 1999 and 2003, to determine the risk of avian influenza virus transmission to persons in contact with the animals. The outbreaks occurred in northern Italy in regions...

Corn grain mould used as pesticide

...ven today the toxin is regarded as one of the most virulent natural carcinogenic substances. The tasteless toxin is produced by the mould aspergillus flavus. It grows in hot, arid regions, in the south-west of the US and in many regions of Africa and Asia. In Third World countries, particularly, this dangero...

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