WHO, South Africa detected mutants designated as "Omicron" and "Variant of Concern"
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"Until proper testing is done, we still don't know if this mutant will avoid the antibodies that protect us from the virus," Fauci told CNN.
The World Health Organization announced on the 26th that a new mutant strain of the new coronavirus "B.1.1.529" detected in South Africa ... → Continue reading
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BiologyInstock(stocks,British: strain) IsmicroorganismOr similarcultureRepresents the same strain, although maintained by.Virus classificationBut also used..In the sense of being separatedSeparation stockThe word (isolate) is also used.
For example,Bacteria,FungiWhen studying, first take a sample from the field and use an appropriate method.cultureThen, take out what you are aiming for from the various microorganisms that emerge from it.In other words, pure culture is performed, but at that time, the extracted microorganisms are first appropriate.Culture medium,generallyAgar mediumStick on top.thisPlantIt is often expressed as.And when the microorganism grows well there, it eventually fills the petri dish,NutritionWill run out and die.That would be a problem, so before that happens,colonyI'll cut out a part of it and put it on a new medium (Subculture,SucceedOften expressed as).By repeating this, the microorganism can be kept at hand.
Therefore, the microorganism to be studied in that case cannot distinguish a single individual, and the strain maintained by subculture in this way must be the target.About such a systemstockCalled.Perhaps it is a plant rather than an operation of planting it, separating it when it grows large, and then succeeding it.stockIt will be an association from.English OfstrainToplantThe stock has no meaning, it is a word that means a family line.In addition, when the microorganisms are collected from the field sample and cultured, the operation of isolation is indispensable.Therefore, the strain obtained by this may be called isolate.
Initially, the term meant the strain of cultivated microorganisms, but as the technique of culturing was applied to various fields, the term also expanded.Cell cultureIn the strain (Cell lineAlternatively, it is called a cell line).Furthermore, there is an example in which those bred by higher plants are also called strains.So to speakReimport.
The same stockCell divisionSince it is inherited by repeating the above, it is basically from the same cell.cloneIt is considered to be a genetically homogeneous population.CytologyIn such fields, a large number of culture strains are treated with unique names as experimental materials because it is possible to carry out unified research if there are common materials in such respects.In addition, wild strains are generally those isolated from the field, and mutant strains are those that represent mutations (especially those that represent mutations).British: variant strain, mutant strain), orAuxotrophyAnd so on.
However, new mutations may occur during culture.There may be new discoveries from there, but in general it is a well-established strain, so it is desirable not to mutate.Therefore, now[When?]Then at low temperatureVacuum dryingThe cells are preserved in an inactive state.Also, various microorganismsCultured cellsCollect and save stocks such asResearch,Education,industrySome institutions distribute it to those who need it for the above reasons.These institutions have plant lineagesseedSave in the form ofSeed bankWith, etc., Genebank or Cellbank (gene,細胞 Ofbank).
- ^ National Institute of Infectious Diseases Virus Department XNUMX, Naokazu Takeda, Toko Shirato, Chiichiro Oka, Kazuhiko Katayama, Etsuko Udagawa, Katsuro Natori, Tatsuo Miyamura "About the name change of calicivirusPathogenic Microorganisms Detection Information (IASR) Vol.24 (12) No.286, p 311 --312,2003 (Heisei15 years)