Combining
a PET scanner with a new chemical tracer that selectively tags specific types
of bacteria, researchers working with mice report they have devised a way to
detect and monitor in real time infections with pathogenic Gram-negative
bacteria.
The
new model emerged from a combination of existing PET scan technology -- a
sophisticated 3-D visualization system for tumor imaging -- with an ingredient
commonly used in sugar-free foods known as sorbitol. The model capitalizes on
Gram-negative bacteria's fondness for sorbitol, which they readily soak up. By
contrast, other classes of bacteria and other microorganisms, cancer, and human
cells do not absorb sorbitol. The researchers hypothesized that converting an
already available PET imaging tracer into radio-labeled sorbitol would
selectively tag and light up clusters of Gram-negative bacteria inside the
body.
For
further details, see:
Posted by Tim Sandle
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