strain

Varicella zoster virus

...nd vidarabine . A live attenuated VZV Oka/Merck strain vaccine is available and is marketed under the t...y Merck, Sharp & Dohme in the 1980s from the Oka strain virus isolated and attenuated by Michiaki Takahashi and colleagues in the 1970s. It was submitted t...

Vaccine

...he effects of infection by any natural or 'wild' strain of the organism. The term derives from vaccinia ...e is not the contagious TB strain, but a related strain called " BCG "; it is used in the United States very infrequently. A number of innovative vaccines ...

Oswald Avery

...acteria called a Pneumococcus was used. The R strain is harmless, while the S strain causes pneumonia in laboratory mice . Substances were available to remove various organic com...

Hfr cell

A hfr cell (also called hfr strain ) is a bacterium with a conjugative plasmid (often F ) integrated into its genomic DNA. Hfr is the abbreviation for high frequency recombination . Unlike a normal F+ cell, hfr strains will, upon conjugation with a F- cell, attempt to transf...

Gene

...s experiment , injections into a mouse of a deadly strain of a bacteria that had been heat-killed transferred genetic information to a safe strain of the same bacteria, killing the mouse. In 1941 , George Wells Beadle and Edward Lawrie Tatum ...

Ebola

...ippines , and was named Ebola–Reston . This strain seemed to be spread through the air, but did not c...ore outbreaks of Ebola–Zare than any other strain of Ebola virus. The first outbreak took place in 1976 in Yambuku , Zaire (now the Democratic Re...

Escherichia coli

...mal. Although in most healthy adult humans such a strain would probably cause no more than a bout of diarr...n people taking certain medications, an unfamiliar strain can cause serious illness and even death. A particularly virulent example of such a strain of E. c...

DNA

...Pneumococcus bacteria were transformed into a new strain of the S form, and the transferred S characteristics turned out to be heritable. In 1944 , the renowned physicist, Erwin Schrdinger , published a brief book entitled What is Life? , where he maintained that chromosomes contained what he called...

Biomechanics

...or, the deformation gradient tensor, and the Green strain tensor. A reader of the biomechanics literature would be well-advised to note precisely the definitions of the various tensors which are being used in a particular work. Biomechanics of Circulation Under most circumstances, blood flow can be mo...

Antibiotic

...active tuberculosis in the United States had a strain that resisted at least one antibiotic. In certain settings, such as hospitals and some child-care locations, the rate of antibiotic resistance is so high that the normal, low cost antibiotics are virtually useless for treatment of frequently seen i...

Ames test

...at already have a single mutation, for example, a strain that cannot produce histidine , an amino acid that is essential for the bacterium to grow if not provided externally with essential nutrients. Cultures of the bacteria are grown in an agar containing dish so that a "lawn" of bacteria is present...