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Tag: "infect" at biology news

Hide and seek: Researchers discover a new way for infectious bacteria to enter cells

...isteria's use of receptor-mediated endocytosis to infect hosts, according to Cossart, suggests that other bacteria may exploit the same mechanism to gain entry into non-phagocytic cells. "This mechanism of cell entry may be used by several different kinds of bacteria, which is a major deviation from the be...

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

..., to study their effects on the virus's ability to infect its target cell," said Ahlquist. Importantly, said Ahlquist, the system successfully produces multiple types of HPV. "We found no specificity of this technique, and there appears to be no reason this method cannot be extended to other subtypes," he ...

Virologist finds contagious equine flu in dogs

...k state. There is no evidence that the virus could infect people. According to a paper published in the Sept. 26 issue of Science Express (Vol. 309, No. 5743), the online version of Science magazine, this is the first time an equine flu virus has been found to jump species. The equine influenza virus, H...

Secrets to antibody's success against West Nile Virus surprise scientists

...nto new viral particles or virions and sent out to infect other host cells and reproduce. But with the viral reproduction process blocked by the antibody, scientists suspect that the host cell eventually destroys the virion. Fremont and colleagues, who publish their results in the Sept. 29 issue of Natur...

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

...e 1950s in Malaysia and Thailand. Langat virus can infect people following a tick bite, but there are no cases of natural disease recorded. In the 1970s Langat was briefly used as a live vaccine against more virulent tick-borne encephalitis viruses in Russia but caused encephalitis complications in about 1 ...

Say what? Bacterial conversation stoppers

...e, so they can move out of the body where they can infect another person. Here, E. coli squelched much of the quorum-sensing response of the cholera bacteria, although the effect was not as dramatic as with the marine bacteria. "The real take-home point is the interference," Bassler said. "Consumption of...

Researchers seek to discover what really happens when a virus enters the body

... virus moves out from the center in its attempt to infect other healthy cells, Duca identifies and stains relevant markers from the virus and the host. Under ultraviolet lighting, the chemical stains become fluorescent, allowing Bell and Duca to capture images of the laboratory dish at regular time interval...

New Look at DNA Hints at Origin of UV Damage

...e pathogen may use similar virulence mechanisms to infect evolutionary disperse organisms. These findings a...ssecting the ways pathogens such as the plague can infect and kill their hosts," said Pamela Marino, Ph.D., scientist at the National Institute of General Med...

Novel plague virulence factor identified

...e pathogen may use similar virulence mechanisms to infect evolutionary disperse organisms. These findings a...ssecting the ways pathogens such as the plague can infect and kill their hosts," said Pamela Marino, Ph.D., scientist at the National Institute of General Med...

Study: Harmless virus kills some cancers

...gling with another virus, AAV2 seems to be able to infect and express itself in other types of cancer cells ... recognize cells that have undergone deregulation, infect them, express its own genes, which disrupt the host cell's life cycle and kill it. Scientists have ...

Two studies document rise of superbugs in the environment

... antibiotics. These drug-resistant "superbugs" can infect people and cause health problems that are difficult to address with the standard antibiotic regimens. One of the culprits is methicillin-resistant Staphylococcus aureus, or MRSA, an organism that was associated mainly with hospital-acquired infection...

Genome study of beneficial microbe may help boost plant health

...m other microbes or viruses, known as phages, that infect bacteria. Says Paulsen: "We found exciting evidence that P. fluorescens may have acquired new clusters of genes, called genomic islands, by means of lateral transfer from phages or other microbes." ...

Scientists find viruses can't stick to sea bugs in the dark

...ages - marine viruses that specifically attack and infect cyanobacteria. These phages can seriously damage the health of the cyanobacteria, and also the sea. Ying Jia, from the University of Warwick, is presenting new research today (Monday, 04 April 2005) at the Society for General Microbiology's 156th Me...

Active Vaccine Prevents Mice From Developing Prion Disease

... for prion-related diseases, and prions can easily infect the body because they do not elicit any immune response. To create a vaccine that could rally the immune system of mice, the NYU researchers designed a vaccine in which scrapie prions were attached to a genetically modified strain of Salmonella. Thi...

Chimp genome reveals a retroviral invasion

...an great apes and Old World monkeys -- but did not infect humans and Asian apes (orangutan, siamang, and gibbon). This undermines the notion that an ancient infection invaded an ancestral primate lineage, since great apes (including humans) share a common ancestor with Old World monkeys. Eichler and collea...

Bee mites suppress bee immunity, open door for viruses and bacteria

... shown that both harmful and harmless bacteria may infect the feeding location." Deformed wing virus is endemic among honey bees in the U.S., although when the European bees became historically infested with this virus, is unknown. However, simply having deformed wing virus does not cause bees to emerge fr...

Touching Molecules With Your Bare Hands

...ent. But some viruses, like the gamma-herpesvirus, infect B cells of the immune system, which occasionally divide. The gamma-herpesvirus genome persists as circular pieces of DNA called episomes. When an infected B cell divides, the latent gamma-herpes virus episome must replicate and segregate into daughte...

How A Latent Virus Eludes Immune Defenses

...ent. But some viruses, like the gamma-herpesvirus, infect B cells of the immune system, which occasionally divide. The gamma-herpesvirus genome persists as circular pieces of DNA called episomes. When an infected B cell divides, the latent gamma-herpes virus episome must replicate and segregate into daughte...

Stealth Worms May Improve Insect Pest Control

...ions in soils for long periods of time before they infect more insects. This naturally-occurring relationship between the nematodes and their mutualistic bacteria has existed for millennia. EPNs are found in terrestrial environments, including deserts, rainforests, grasslands and other ecological systems, ...

Gladstone investigators discover how resting T cells avoid HIV infection

... the prevailing belief has been that HIV failed to infect resting T-cells due to a simple lack of some essential factor or nutrient," says Greene, a professor of medicine, microbiology and immunology at the University of California, San Francisco. "This study now shifts the paradigm, showing that resting CD...

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