Isolation Techniques and Selective Media, A Photographic Atlas for the Microbiology Laboratory, Tellurite Glycine Agar
Purpose
Tellurite Glycine Agar is an undefined, selective, and differential medium used for the isolation of coagulase-positive staphylococci from various sources. The most common and clinically important coagulase-positive staphylococcus is Staphylococcus aureus.
Principle
Among the ingredients of Tellurite Glycine Agar are the carbohydrate mannitol, potassium tellurite, and lithium PurposeTellurite Glycine Agar is an undefined, selective, and differential medium used for the isolation of coagulase-positiv staphylococci from various sources. The most common and clinically important coagulase-positive staphylococcus is Staphylococcus aureus.
2-28 TELLURITE GLYCINE AGAR Clockwise from
the top right: Gram-positive, coagulase-negative
Staphylococcus epidermidis, Gram-positive, coagulasepositive
Staphylococcus aureus, and Gram-negative
Escherichia coli, grown on Tellurite Glycine Agar. Notice
that E. coli is inhibited, and that the two staphylococci
may be differentiated by their ability to reduce sulfur
and turn the growth black.
Suggested Reading
- Michael J. Leboffe & Burton E. Pierce. A Photographic Atlas for the Microbiology Laboratory 4th edition 2011
COMMENTS