"IDEXX-QC IS A SET OF BACTERIAL CULTURES FOR USE IN QUALITY CONTROL TESTING OR AS PERFORMANCE EVALUATION STANDARDS; THE IDEXX-QC COLIFORM AND E. COLI KIT PROVIDES AN E. COLI POSITIVE CONTROL, A COLIFORM POSITIVE CONTROL (K. PNEUMONIAE) AND A NEGATIVE CONTROL (P. AERUGINOSA); THE VIABLE ORGANISMS ARE EACH CONTAINED IN A COLORED DISC, WHICH RESIDES ON TOP OF A COTTON PLUG AND SILICA GEL DESICCANT IN THE VIAL; STORAGE: THE VIALS MUST BE STORED UNOPENED AT OR BELOW -10 DEG C; THE REAGENTS ARE STABLE THROUGH THE EXPIRATION DATE WHEN STORED AT THIS TEMPERATURE"