October 12, 2004
A new nanoparticle test for dangerous bacteria such as Escherichia coli O157:H7 is so sensitive it can detect a single bacterial cell within minutes.
The new test consists of silica nanoparticles, each housing thousands of fluorescent dye molecules and each attached to an antibody for a given bacterium.
The nanoparticles are added to a solution of the test sample, such as ground beef. If the bacterium sought is… read more