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Tag: "infecting" at biology news

New bacterium discovered -- related to cause of trench fever

...l important lessons: new diseases and new bacteria infecting humans are still being discovered, and it is important to carefully investigate the genetic make-up of all bacteria that appear in any new or unusual infection. This kind of sleuthing allowed the researchers to discover the new organism, Bartonella r...

Researchers discover 'acquired' DNA key to certain bacterial infection

...quired genes, the bacterium is very inefficient in infecting environmental amoeba, which is the environmental host,” Bermudez said. “In fact, its efficiency is close to zero. But with this ‘island’ of acquired genetic material, the bacterium finds a way to get inside the cells and it takes control, not the pha...

How plague-causing bacteria disarm host defense

...guys that help bacterial pathogens do their job of infecting the host by crippling the body's immune system. In essence, they knock down the front door of resistance and disarm the cell's alarm system. Now, researchers at the University of California, San Diego (UCSD) School of Medicine have identified a nov...

Smallpox outbreak: How long would it take for vaccines to protect people? Would it work?

...by giving the body a jump-start at recognizing the infecting virus or bacteria," said Sharon Frey, M.D., the principal investigator for the study at Saint Louis University. "After successful vaccination, the body experiences a quicker fighting response to the infection, which lessens or completely avoids the s...

Healthy coral reefs hit hard by warmer temperatures

...fer low-lying coastal areas. "More diseases are infecting more coral species every year, leading to the global loss of reef-building corals and the decline of other important species dependent on reefs," said lead study author John Bruno at UNC. "We've long suspected climate change is driving disease outbre...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...e connection between illness and sleep patterns by infecting fruit flies with one of two bacteria - Streptococcus pneumoniae or Listeria monocytogenes. The infected flies lost their "day" and "night" patterns of activity, which are part of the regular changes that occur in the course of a day, called circad...

Deconstructing brain wiring, one neuron at a time

...rus. This prevented the modified rabies virus from infecting mammalian neurons at all ?unless they had been engineered to express the bird virus's receptor, a bird cell surface protein known as TVA. Such neurons will then be "disguised" as bird cells and the rabies virus ?now acting like a bird virus ?will inf...

Investigating the measles virus as a tool to kill multiple myeloma

...r the cancer cells. Upon entry, the virus spreads, infecting nearby tumor cells and fusing them together, increasing cancer cell death. This study differs from the other two open clinical trials because researchers are administering the measles virus strain intravenously, rather than directly to the tumor ...

New recommendations against a major opportunistic infection -- cryptococcosis

...vere infections, such as the patient’s sex and the infecting serotype. In light of the results, the authors propose a modification in the therapeutic treatment of individuals suffering from cryptococcosis. Caused by a microscopic fungus, Cryptococcus neoformans, cryptococcosis affects immunosuppressed individ...

Bacteria control how infectious they become, study finds

...ill a cell, while too little would prevent it from infecting any living being. “We think that RfaH is responsible for more than making a microbe infectious,?he continued. “Actually seeing what happens at the molecular level will help us figure out what else this protein regulates.? Svetlov and Artsimovitc...

Trojan horse strategy defeats drug-resistant bacteria

...s potent defense mechanisms to keep iron away from infecting organisms, and invaders must steal some if they ar...ause iron is so important in infection, we thought infecting bacteria might be vulnerable to interventions that target iron," explained Yukihiro Kaneko, senior f...

Discovery of an HIV inhibitor in human blood points to new drug class

...rus predominantly responsible for human AIDS, from infecting immune cells and multiplying. The virus blocker might play a role in the progression of HIV to full-blown AIDS and—because it works in a different way than existing antiretroviral inhibitors—could lead to the development of another class of drugs in ...

Study uncovers a lethal secret of 1918 influenza virus

...ses and their potential to cause pandemics." By infecting monkeys with the virus, the team was able to show that the 1918 virus prompted a deadly respiratory infection that echoed historical accounts of how the disease claimed its victims. Importantly, the new work shows that infection with the virus prom...

New research may overturn conventional wisdom on drug-resistant tuberculosis

...ng thought to be acquired through mutations in the infecting strain when the treatment regimen was inadequate or the patient did not comply with it. More recently, studies of the genetic make-up of Mycobacterium tuberculosis (M. tuberculosis) strains have shown that resistance can also result from re-infection...

Experimental vaccine given during pregnancy reduces stillbirths from common virus

...he virus?genes, to prevent it from reproducing and infecting new hosts. The young female guinea pigs in the study were vaccinated three times at two-month intervals before they became pregnant and were injected with the guinea pig form of CMV early in their third trimester. Tests showed that the rodents ...

Widely used hepatitis B drug spurs HIV drug resistance

...V showed that the drug did not stop the virus from infecting the cells. This provided evidence, scientists say, that the drug specifically fostered development of this mutation in HIV, later confirmed by clinical testing. When researchers tested the blood of one of the co-infected patients for the M184V mu...

UCSF study will test new vaginal microbicide for herpes and HIV

...dendrimer branches and prevented from entering and infecting human cells, Moscicki said. To participate in the study, women must be between 18 and 24 years old, sexually active, healthy and free of any sexually transmitted disease. They cannot be pregnant or breast feeding. They must either have regular men...

Einstein researchers demonstrate a novel approach to treating AIDS

...he multiplication of HIV and help prevent HIV from infecting additional cells," says Dr. Harris Goldstein, Director of the Center for AIDS Research at Einstein. "But we currently have no way of eliminating the HIV-infected cells that make these infections chronic. The novelty of this technique is that it targe...

'Protecting virus' offers instant flu protection and converts flu infections into their own vaccines

...ding H5N1 and any new pandemic or epidemic strains infecting humans. The 'protecting virus' provides instant pr... beneficial effect whatever strain of influenza is infecting you. This is because the coat of the virus is irrelevant to the protection process ?the effect work...

Virus may control Australia's

...ies suggest that it has a very limited host range, infecting only carp. "If the laboratory studies show promise, the next step will be extensive government, public and industry consultation to determine the best course of action to control carp, while protecting and restoring Australia's valuable waterways," ...

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