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Modified Edwards Agar



This is a special isolation agar is specifically designed to optimally detect Streptococcus agalactiae from individual cow and bulk tank milk samples.



This dark purplish red, translucent agar is prepared from a blood agar base with the addition of 5% washed bovine erythrocytes and Beta hemolysin.  This agar has been formulated with inhibitors to discourage a variety of non-target organisms. The addition of Beta hemolysin allows for the capability of differentiating Streptococci by providing a camp-like hemolytic reaction, typically within 24 hours.  The media will exhibit a complete circular hemolysis around each suspect Streptococcus agalactiae colony.  All suspect Streptococcus agalactiae organisms should be moved to our special Camp media for confirmation.  The inhibitors in the media will inhibit Staphylococcus and most coliform organisms.

Refer to table on back for expected culture responses.


Organism Growth Reaction
Strep. agalactiae Excellent Complete Hemolysis
Staph. aureus Inhibited
Mycoplasma Not Applicable
Strep. dysgalactiae Excellent Hemolytic negative
Strep. uberis Excellent Hemolytic variable
E- strep Excellent Hemolytic negative
Staph. species Inhibited
E. Coli Inhibited
Klebsiella pneumoniae Inhibited
Klebsiella species Inhibited
Pseudomonas species Fair
Pseudomonas aeruginosa Weak
Pasteurella Inhibited
Proteus Inhibited
Serratia Inhibited
Bacillus Inhibited
Yeast Inhibited
Mold Inhibited
Nocardia Inhibited
Prototheca Inhibited
Trueperella pyogenes Inhibited
C. bovis Inhibited

Additional information

Weight .06 lbs
Dimensions 3.5 × 3.5 × .5 in


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