Fig 3. Mean (±SE, n = 30) C. difficile counts (log₁₀ cfu/mL) for all strains following inoculation of faecal filtrate (FF) washed spores onto CCEYL agar.

Statistical significance was determined using two-sample t-test. Horizontal dashed line indicates limit of detection (1.22 log₁₀ cfu/mL). #a = Too many colonies to count at neat dilution, therefore log₁₀ cfu/mL extrapolated from a countable dilution. #b = no growth at neat dilution, log₁₀ cfu/mL recorded as limit of detection. #c = log₁₀ cfu/mL in 10⁻⁴ dilution.