Case-Control Study of Papillomatous Digital Dermatitis in Southern California Dairies
DOI:
https://doi.org/10.21423/aabppro19965974Keywords:
papillomatous digital dermatitis, PDD, dairy environment, management, PDD occurrenceAbstract
In order to describe papillomatous digital dermatitis (PDD), and to determine risk factors for highly affected dairies, data from 37 southern California dairies with >5% of cows affected (highly affected dairies, cases) were compared with those from 20 dairies with 5.5% of cows affected (controls). Information on dairy environment, management and PDD occurrence was obtained from dairy managers, veterinarians and hooftrimmers, and by direct measurement.