The Ames strain is one of 89 strains of the anthraxbacterium (Bacillus anthracis). It was isolated from a diseased cow that died in Texas in 1981. Researchers at the time mistakenly believed the strain came from Ames, Iowa and mislabeled the specimen. In biology, Strain can be used two ways. ... Phyla/Divisions Actinobacteria Aquificae Bacteroidetes/Chlorobi Chlamydiae/Verrucomicrobia Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Nitrospirae Omnibacteria Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Bacteria (singular, bacterium) are a major group of living organisms. ... Binomial name Cohn 1872 Structure of Bacillus anthracis. ... For other uses, see Texas (disambiguation). ... Main Street in downtown Ames in 2006 Ames is a city located in the central part of the U.S. state of Iowa, about 30 miles north of Des Moines in Story County. ...
The Ames strain came to wide public attention in association with the 2001 anthrax attacks. Seven letters mailed to media outlets and US Senators on September 18, 2001 and October 9, 2001 contained anthrax bacteria of this particular strain. This strain is a monomorphic disease, mutating slowly if at all. The 2001 anthrax attacks in the United States, also known as Amerithrax from its FBI case name, occurred over the course of several weeks beginning on September 18, 2001. ... is the 261st day of the year (262nd in leap years) in the Gregorian calendar. ... This article is about the year. ... is the 282nd day of the year (283rd in leap years) in the Gregorian calendar. ... This article is about the year. ...
Because of its virulence, the Ames strain is used by the United States as a "gold standard" for development of vaccines and testing their effectiveness, starting in the 1980s, after work on weaponizing the Vollum 1B strain ended and all weaponized stocks were destroyed after the end of the U.S. biological warfare program in 1969.  Virulence refers to the degree of pathogenicity of a microbe, or in other words the relative ability of a microbe to cause disease. ... A vaccine is an antigenic preparation used to establish immunity to a disease. ... For the use of biological agents by terrorists, see bioterrorism. ...
Understanding the distribution of the Amesstrain may be critical to the government's search for those behind the attacks that have killed five people, infected 13 others and disrupted the federal government.
Those attacks involved the Amesstrain, a virulent anthrax bacteria named for the Iowa city where it was originally isolated, according to an Oct. 25 statement from Tom Ridge, the White House director of homeland security.
A natural or "wild" strain, Ames was recognized relatively early for its virulence and for its ability to resist vaccines.
Strain A can immediately be ruled out as the attack strain as it is missing a plasmid, and is non-pathogenic.
The strains from the collaborative labs appear certain to be strains B, C and D. In that case, one was the reference Ames in Keim's collection that came from a freezer at Porton Down, which in turn had got it from USAMRIID.
The difference between D and the attack strain is not great - there are 36 alanines in a row, instead of 35 - but Keim's team made doubly sure by sequencing that part of the D strain's genome.
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