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Trans-epidermal water loss (TEWL) following infestation of sheep skin with P. ovis. TEWL expressed as grams per square meter per hour, values represent the mean values across four sheep, over two independent sites with triplicate measurements from each site at each time point. *** = p < 0.005, ** = p < 0.01. Error bars show standard deviation of values across all samples (n = 4).
