String culture inoculum

摘要

The present invention is concerned with a string culture inoculum comprising a string having stabilized cells of one of }Salmonella typhimurium ATCC 6994 }Klebsiella pneumoniae ATCC 10031 }Enterobacter cloacae ATCC 11367 }Escherichia coli ATCC 25922 }Citrobacter freundii ATCC 6750 }Proteus vulgaris ATCC 881 }Pseudomonas aeruginosa ATCC 15442 }Shigella sonnei ATCC 11060 }Serratia marcescens ATCC 14756 }Staphylococcus aureus ATCC 25923 }Staphylococcus epidermidis ATCC 17917 }Streptococcus faicalis ATCC 10541 }Streptococcus pyogenes ATCC 12202 } dispersed throughout, said string culture inoculum having a sufficient number of stabilized cells adhered thereto to produce at least 105 cells per milliliter upon incubation in 3 milliliters of suitable broth at 37 DEG C. for 2 hours. The string culture inocula of the present invention are useful as quality control cultures for positive as well as negative controls in clinical bacteriology procedures and drug susceptibility testing.