Colistin-Oxolinic Acid-Blood Agar (COBA)
The figure shows a COBA plate, on which Streptococcus equi subsp. zooepidemicus, that produces β-hemolysis has been cultivated. The plate is shown with lighting from above (A) and from below (B). - Click on the image to enlarge it.
The figure shows COBA plates. Bacteria have not been cultivated on plate A. On plate B and C Streptococcus dysgalactiae subsp. dysgalactiae, that produces α-hemolysis has been cultivated. The plate is shown with lighting from above (B) and from below (C). - Click on the image to enlarge it. ApplicationsColistin-Oxolinic Acid-Blood Agar (COBA) is a selective medium, which is used for isolation of streptococci. The medium contains antibiotics that inhibits growth of gramnegative bacteria Content of the medium:COBA is a blood agar based medium, which contains colistin sulfate and oxolonic acid. Other comments:Most streptococci are not inhibited by colistin sulfate and oxolonic acid, whereas members of the family Enterobacteriace, Pseudomonas aeruginosa, staphylococci and corynebacteria are inhibited. Updated: 2019-05-28. |
