Evaluation of Two Supplemented Culture Media for Long-Term, Room-Temperature Preservation of Streptococcus pneumoniae Strains

Figure 3

Pneumococcal survival-time curves based on the means and standard deviation of CFU of clinical isolates group (H2 and 61), nasopharyngeal isolates group (EF28 and EF33), and S. pneumoniae ATCC 49619 strain stored on TH-HYC agar, along test 2. CFU (+): the number of CFU was expressed as crosses of growth in the recovery plate. TH-HYC: Todd-Hewitt/Hemoglobin/Yeast/Charcoal.