Fig. 2

The livestock-associated methicillin-resistant Staphylococcus aureus counts (CFU/mL) on concrete surfaces over time. Two different concrete surfaces were used (concrete disks and concrete pieces). Concrete disks were observed for 4 weeks and concrete pieces for 11 weeks. All strain and material combinations were plated in triplicates on Oxoid Brilliance MRSA 2 agar (MRSA) and as a single sample on 5% bovine blood agar (BA). The points represent the observed viable counts; counts with less than 30 CFU are also included in the figure. If a sample had a count below the quantification limit (< 30) on multiple dilution plates, the count from lowest dilution is presented. The lines represent the mean viable count of each concrete type, strain and plate combination