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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Differentiation of gram-positive and gram-negative bacteria and yeasts using a modification of the "string" test.

Solutions of potassium hydroxide and sodium hydroxide with concentrations between 0.5% and 4% were found to produce mucoid and sticky suspensions when added in drops, using a bacteriological loop, to smears of 609 strains of gram-negative bacteria on glass slides. A total of 461 strains of gram-positive bacteria and yeasts did not produce any mucoid or "string" formation when treated with the same solutions. It was concluded that this modified test could aid in differentiating gram-positive from gram-negative organisms.[1]

References

  1. Differentiation of gram-positive and gram-negative bacteria and yeasts using a modification of the "string" test. Agbonlahor, D.E., Odugbemi, T.O., Udofia, P.O. The American journal of medical technology. (1983) [Pubmed]
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