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Results of the quantitative and qualitative analysis of ESBL-producing E. coli in cfu/g of litter for the winter trial samples (A) and the summer trial samples (B). The geometric mean of 3 samples is shown for each point in time. The error bars indicate the upper and lower 95% confidence intervals. The graphs were shifted to improve the visibility of the error bars. ESBL, extended-spectrum beta-lactamase.
