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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Prevalence of pathogen DNA on each date of analysis (n = 63) for the dairy herd improvement (DHI) sampling set. Each black dot represents an outlier date, whereas the red dots represent the average prevalence.