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Tag: "bacterium" at biology news

Understanding why C. difficile causes disease -- it's hungry

...d locus. Two of the genes code for the toxins the bacterium produces that cause disease and a third gene codes for a protein that makes a hole in the organism’s cell envelope to let the toxins out. The last two genes are of greatest interest to Sonenshein and his colleague, Bruno Dupuy from the Institut Past...

Modified mushrooms may yield human drugs

...smids, which have the ability to multiply within a bacterium known as Agrobacterium. The hygromycin resis...terium. Over the course of several days, as the bacterium goes through its lifecycle, it transfers a portion of its plasmid out of its cell right into the mus...

Helping chlorine-eating bacteria clean up toxic waste

...cultures that are injected into cleanup sites. The bacterium also grows better in a mixed community with other kinds of bacteria. "There are some factors it needs from other organisms, and we don't know yet what they are," she said. Her laboratory will test the D. ethenogenes strains under a variety of diff...

Researchers discover 'acquired' DNA key to certain bacterial infection

...ry of a mechanism by which Mycobacterium avium – a bacterium which can result in serious lung infections and is...f the study. “Without these acquired genes, the bacterium is very inefficient in infecting environmental amoeba, which is the environmental host,” Bermudez sa...

Bacteria ferry nanoparticles into cells for early diagnosis, treatment

...corporate only one copy of your gene cargo to each bacterium or virus particle," Akin said. In the new approach, bacteria can carry hundreds of nanoparticles, each of which can in turn carry hundreds of drug molecules, depending on the size of the nanoparticles. The approach also could make it possible t...

Small, self-controlled planes combine plant pathology and engineering

...collected with our autonomous UAVs appears to be a bacterium known only to exist in a cavern in Arizona,” he said. “What was that bacterium doing 100 meters above Kentland Farm" In many of our other samples, we have found organisms that hav...

Newly found sensing system enables certain bacteria to resist human immune defenses

...ories (RML), the scientists used the gram-positive bacterium Staphylococcus epidermidis to study its response to a specific human AMP, human beta defensin 3. S. epidermidis is one of several hard-to-treat infectious agents that can be transmitted to patients in hospitals via contaminated medical implants. Find...

New bacterium discovered -- related to cause of trench fever

A close cousin of the bacterium that debilitated thousands of World War I soldiers...ive work revealed that she was infected with a new bacterium that had never before been isolated from a human. A UCSF infectious disease team, in collaborat...

A new plant-bacterial symbiotic mechanism promising for crop applications

...is of the Nod factor, a compound elaborated by the bacterium which enables the plant to recognize it, by molecular recognition, thereby allowing the microorganism to penetrate inside the plant by the root hairs. The finding raises the question as to what signalling pathway Bradyrhizodium might use to gain e...

Researchers track how spores break out of dormant state

...it shows with unprecedented resolution how the new bacterium emerges from the disintegrating spore. The new research, led by Lawrence Livermore National Laboratory scientists, appears in the May 28-June 1 early online edition of the Proceedings of the National Academy of Sciences. The research appears in this ...

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