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Tag: "transmitted" at biology news

UCI scientists reconstruct migration of avian flu virus

...lihood that it will mutate into a form that can be transmitted from human to human." Avian flu has been isolated almost exclusively among bird populations. The H5N1 virus has only sporadically been passed on from a bird host to humans; there is little evidence that the virus can efficiently be passed on from ...

Study suggests some drug resistance to influenza B medications

...ion or through drug selection, or whether they are transmitted within families or acquired from the community, the resistant variants may be here to stay. In light of the recent observation that oseltamivir may be less effective against influenza B than against influenza A, an important concern is whether subopt...

Scientists identify molecular cause for one form of deafness

... cells, which then trigger nerve impulses that are transmitted to the brain. Researchers have now learned that mutations in a protein called espin can cause floppiness in tiny bundles of protein filaments within the hair cells, impairing the passage of vibrations and resulting in deafness. Filamentous actin ...

Male-killing bacteria makes female butterflies more promiscuous

...m more rampant!" The male-killling bacterium is transmitted from mother to son and actually kills the son before the embryo hatches into a caterpillar. Only female offspring of female carriers of the bacteria can survive, which can lead to the male population being as low as one male to every hundred females ...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...ransplanted cells replaced damaged nerve cells and transmitted nerve impulses, offering the first evidence that stem cell-derived nerve cells may integrate electrically and functionally into a diseased brain. The transplanted cells also boosted the brain's supply of the enzyme Hex, which reduced the lipid accumu...

UTSA researchers examine effects of global warming on Antarctic

...s of the sea ice for their own research and also transmitted meteorological data regularly into the world weather observing network for a variety of factors including water and air temperatures, wind speed and direction, visibility, cloud cover and atmospheric pressure. "As a student it was an amazing once...

Africa's first large-scale HIV vaccine study launches

...l be provided access to treatment for any sexually transmitted infection acquired during the study. Recent research has shown that men who are circumcised are less likely to become HIV infected when they have sexual relations with women. As a result, access to medical circumcision also will be provided to male ...

Cancer-killing invention also harvests stem cells

.... In a process called metastasis, these cells are transmitted from the primary tumor to other locations in the body, where they form secondary, cancerous growths. As a cancer cell flows along the implanted surface, King's device captures it and delivers an apoptosis signal, a biochemical way of telling the ...

Scientists sequence genome of parasite responsible for common sexually transmitted infection

...es trichomoniasis, one of the most common sexually transmitted infections (STIs), revealing potential clues as to...ony S. Fauci, M.D. Trichomoniasis is a sexually transmitted infection that affects both men and women and results in roughly 7.4 million new cases in the United...

The chimpanzee stone age

...esources. Nut cracking behaviour in chimpanzees is transmitted socially, and the new discoveries presented in this study shows that such behaviour has been transmitted over the course of many chimpanzee generations. Chimpanzee prehistory has deep roots! The study o...

Researchers from the UGR use a bacterium to obtain biopreservatives from food

...t numerous bacteria, including pathogenic bacteria transmitted by food, "which makes it a suitable molecule to use as a biopreservative." The research carried out at the UGR will complete the information concerning the way that bacteriocins act on bacterial membranes and will also help in designing antimicrob...

Study identifies risk factors for spread of respiratory infections in hospitals

...ARS," he concluded, "but also for other infections transmitted by droplets such as influenza. Fast Facts Placing hospital beds less than 1 meter apart increased the risk of SARS transmission from one patient to another. Hospital staff working while showing symptoms of SARS also increased th...

Researchers find hepatitis A and hepatitis C attack same protein to block immune defenses

... in common. The two are far apart genetically, are transmitted differently, and produce very different diseases. ... water, for example), but hepatitis C is generally transmitted only by direct contact with infected blood. Hepatitis A produces fever, nausea and abdominal pain th...

Mosquito repellents that emit high-pitched sounds don't prevent bites

... to do more research with the devices. Malaria is transmitted when a person is bitten by an infected female mosquito. Manufacturers of electronic mosquito repellents (EMRs) claim that the high pitch sound they emit repels female mosquitoes, and therefore protects people in the vicinity from bites and disease. ...

Researchers discover surprising drug that blocks malaria

...or 50 years. A blood-borne illness, malaria is transmitted by infected mosquitoes. The symptoms include high fevers and flu-like symptoms such as chills, headache, muscle aches and fatigue. The disease kills an estimated 2 million people a year, mostly African children under five. It also poses a risk to tra...

New test for most virulent HPV strains under study

...options for screening for the most common sexually transmitted disease. The current national study is giving the new HPV test and the type-specific assay to 1,500 women age 30 and older with a negative Pap test and to 1,000 women age 18 and older with cervical cell changes of undetermined significance ?pathol...

Experimental vaccine given during pregnancy reduces stillbirths from common virus

...United States are infected with CMV. The virus is transmitted to the fetus through the mother’s placenta. Dr...s the mouth or breaks in the skin. It can also be transmitted through nasal secretions, blood transfusions, and sexual contact. Most adults will become infected ...

'Ancestral eve' was mother of all tooth decay

...n 100,000 and 200,000 years ago. S. mutans is transmitted from mothers to infants, and first appears in an infant’s mouth at about two years of age. Caufield’s findings are reported in an article in the February issue of the Journal of Bacteriology. In his analysis of the bacterium, Caufield used DNA fi...

Viral protein is an effective preventative against infection

...e ear infections, Streptococcus pneumoniae, aren’t transmitted at school. They already reside on the mucosal membranes in the nose, waiting for their chance to strike. When a child catches the flu, or another virus that causes an upper respiratory infection, the bacteria seize the opportunity and migrate to the ...

2,000 influenza virus genomes now completed and publicly accessible

...f a new, highly lethal virus strain that is easily transmitted from person to person. Influenza pandemics have occurred three times in the last century, the most lethal of which was the pandemic of 1918, which caused an estimated 40 to 50 million deaths worldwide. "A few years ago, only limited genetic inform...

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