[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 34.226.244.70. Please contact the publisher to request reinstatement.
[Skip to Content Landing]
Article
July 25, 1959

SIMPLE PAPER TEST FOR DETERMINING BACTERIAL SENSITIVITY TO ANTIBIOTICS

Author Affiliations

Omaha

Assistant Professor of Biochemistry (Dr. Ryan), medical student (Mr. Igel), and Instructor in Medicine (Dr. Williams), Creighton University School of Medicine.

JAMA. 1959;170(13):1528-1530. doi:10.1001/jama.1959.03010130032008
Abstract

The test paper here described makes it relatively easy to choose the antibiotic best suited for treatment of a given bacterial infection. Each type of test paper bears both a culture medium and an antibiotic and is supplied, dry and sterile, in a transparent envelope. For a given test, the paper is wetted and inoculated and the envelope with its contents is incubated. It is not necessary to wait for the appearance of visible colonies because the metabolic activity of the bacteria is detected by an indicator (triphenyltetrazolium chloride) which is colorless until reduced to a bright red dye by bacterial enzymes. The reliability of the new test was established by a comparative study with other methods in 100 clinical cases. The test paper is easily stored, and the entire unit can be incinerated after use. It is therefore useful in general office practice and should help to make sure that each patient receives the most effective antibiotic.

×