Side 1: Primary UTI Chromogenic Agar
This is a chromogenic medium based on CLED that has been developed to allow differentiation and presumptive identification of organisms typically found in urinary tract infections. Reduced electrolyte concentration prevents swarming of Proteus spp. A sophisticated binary chromogenic system and supplementation with tryptophan allows differentiation of enterococci (turquoise colonies), Proteus spp (clear colonies with a brown halo), Enterobacter spp (metallic blue colonies), staphylococci (white colonies), and E. coli (purple colonies).
Side 2: Columbia Agar w 7% Defibrinated Horse Blood & CNA
This is a selective medium for the isolation of Staphylococcus/ spp and Streptococcus spp. It is based on Columbia Agar enriched with defibrinated horse blood which promotes good colony appearance, pigment production and excellent haemolysis from beta-haemolytic streptococci. The medium is made selective by the inclusion of colistin and nalidixic acid to suppress growth of the majority of Gram-negative bacteria.