Association between ATP luminometry of feeding equipment and environmental and health parameters of preweaned calves on dairy farms.

The objective of this study was to examine the influ- ence of different environmental factors on ATP lumi- nometry measurements of feeding equipment and to investigate associations with health of preweaned calves and the levels of ATP identified through luminometry. On 50 commercial dairy farms in Quebec, Canada, ATP lu- minometry measurements (in relative light units (RLU)) were obtained using the direct swabbing technique with Hygiena UltraSnap swabs and a liquid rinsing technique with the...