strain
A tearing injury to muscle. Usually causes some degree of bleeding within the muscle tissue (haematoma).
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Strain
An organism that is different from other organisms of the same species due to genetic differences.
F- strain: E.coli strain behaving as recipients during conjugation (female). It lacks the F factor.
If a strain of resistant bacteria shows up in a community, let's say it shows up in a school. What should the public health people be doing to control it?
[edit] Strains
Model of successive binary fission in E. coli
A strain of E. coli is a sub-group within the species that has unique characteristics that distinguish it from other E. coli strains.
Strains of HIV (designated "R5") bind the coreceptor CCR5. These are the strains that are most infectious.
Strains of HIV (designated "X4") bind the coreceptor CXCR4.
Strain
Pure culture of microorganisms composed of the descendants of a single cell.
Related Terms:
Progeny
The subsequent generation following a mating or crossing of parents; offspring.
The strain used in this study does not cause disease, but related toxic strains have been associated with an increasing number of human food poisonings.
Two strains of Drosophila paulistorum developed hybrid sterility of male offspring between 1958 and 1963. Artificial selection induced strong intra-strain mating preferences.
Host strain (bacterial): The bacterium used to harbor a plasmid. Typical host strains include HB101 (general purpose E. coli strain), DH5a (ditto), JM101 and JM109 (suitable for growing M13 phages), XL1-Blue (general-purpose, ...
Vaccine strain derived from SAD by escape mutant monoclonal antibody techniques (Street Alabama Gif) ...
A mutant strain of microorganism that will proliferate only when the medium is supplemented with some specific substance not required by wild-type organisms.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
coli strain is F lac Z met bio. Cells from this strain are mixed with an E. coli strain that is lac Z met bio and carrying an F' episome with the plac O lac Z DNA sequence on the episome, and cultured for several hours.
a homozygous strain produced by inbreeding
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
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1. The dead S strain had been reanimated/resurrected.
2. The Live R had been transformed into Live S by some "transforming factor".
Further experiments led Griffith to conclude that number 2 was correct.
biotype. A strain of a species that has certain biological characters separating it from other individuals of that species.
blackarm. Bacterial blight lesions on stems.
Nearly identical strains of an organism; they vary at only a single locus.
Comparative genomics
The study of human genetics by comparisons with model organisms such as mice, the fruit fly, and the bacterium E. coli.
Auxotrophic mutantA bacterial strain which has a mutation in at least one of the enzymes in a biochemical pathway responsible for synthesising an essential substance, for example an amino acid.
Antibiotic use in food animal production has been associated with the emergence of antibiotic-resistant strains of bacteria including Salmonella, Campylobacter, Escherichia coli and Enterococcus, among others.
Mutations in the antigenic structure of the influenza virus have resulted in a number of different influenza subtypes and strains.
Vaccines therefore may consist of just the viral protein coat (some flu vaccines), or they may be heat-killed viruses (the Salk polio vaccine) which can no longer replicate or a vaccine may be an "attenuated" live virus strain (Sabin polio vaccine).
Ossification of muscular tissue as a result of repeated strain or injury is not infrequent. It is oftenest found about the tendon of the Adductor longus and Vastus medialis in horsemen, or in the Pectoralis major and Deltoideus of soldiers.
The term "true-breeding strain" is a code word for homozygous. Dominant alleles are those that show up in the next generation in crosses between two different "true-breeding strains".
Although a neutrophil can kill this bead-like string of Streptococcus pyogenes, this particular strain of bacteria expresses streptolysin-s on its surface which kills the white cell through necrosis, ...
molecular mapping line Strains that are typically used for molecular mapping are generally recombinant inbred lines. RI lines are derived from a cross between parents with polymorphic genotypes.
A cross between a progeny from a previous cross and its parental strain, a cross of a heterozygote with its homozygous recessive parent, or the cross of a plant of unknown genotype with a homozygous recessive.
Related Terms:
Heterozygote ...
He observed that heat-killed S strain bacteria injected into mice did not kill them. When he injected a mixture of heat-killed S and live R bacteria, the mice died. Moreover, he recovered living S bacteria from the carcasses.
A group of planktonic tunicates that secrete a gelatinous house, used to strain unsuitable particles (large particles are rejected).
Ecotype a genetic strain of a population that is adapted to the unique local environmental conditions
(eco‚ oikus = house) ...
Pesticide resistance: A genetic change in response to selection by a pesticide, resulting in the development of strains capable of surviving a dose lethal to most individuals in a normal population.
stress Physical, chemical, or emotional factors that place a strain on an animal. Plants also experience physiological stress under adverse environmental conditions.
stress-related disease See stress shock.
In primitive chordates the pharyngeal slits are used to strain water and filter out food particles; in fishes they are modified for respiration. Most terrestrial vertebrates have pharyngeal slits only in the embryonic stage.
Insect resistant (plants): Tolerant of, or resistant to, insect attack (as in plants). individuals from strains whose ancestors had not been exposed to the pesticide.
During extraction of plasmid DNA from the bacterial cell, one strand of the DNA becomes nicked. This relaxes the torsional strain needed to maintain supercoiling, producing the familiar form of plasmid. (See Plasmid.) ...
Selectins Carbohydrate-binding proteins that constrain immune-system cells to the site of injury in an inflammatory response.
Selectivity filter A region of ion-channel proteins that determines the specificity of a particular channel.
(awk-soh-trohf)
A nutritional mutant that is unable to synthesize and that cannot grow on media lacking certain essential molecules normally synthesized by wild-type strains of the same species.
Aves ...
You have incubated super bacteria! It's happening all the time in hospitals. We are killing off the easy diseases but some mutant strains are surviving. We might not be able to cure people next time a bad disease infects people.
We have embarked on a detailed study of the structure and mechanism of PETN reductase from a strain of Enterobacter cloacae.
This relaxes the torsional strain needed to maintain supercoiling, producing the familiar form of plasmid. (See Plasmid.) NIH. See National Institutes of Health. Nitrocellulose.
Tumor suppressor gene -- genes that normally function to restrain the growth of tumors; the best understood case is for hereditary retinoblastoma.
 See also: Trans, Organ, Human, Cells, DNA
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