Papillomatous digital dermatitis in Chilean dairies and evaluation of a screening method

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)197-207
Journal / PublicationPreventive Veterinary Medicine
Volume37
Issue number1-4
Publication statusPublished - 1 Dec 1998
Externally publishedYes

Abstract

Outbreaks of papillomatous digital dermatitis (PDD) have been reported from many countries, but there is little information on prevalence and geographic distribution of the disease. Our objectives were to describe prevalence of PDD on dairies belonging to the two main dairy-producer associations in Chile, and to evaluate a milking-parlor screening method for detection of PDD in dairy cows. First, a self-administered questionnaire was sent to all 214 association dairy managers. Seventy percent of the 119 respondents had observed PDD on their dairies. About 83% of the 63 responding managers had first seen PDD during the previous 10 years. Subsequently, a random sample of 43 dairies stratified by association was selected from the total 214 for PDD screening. During milking, we inspected cows' feet for PDD lesions; 91% of dairies had cows affected by PDD; median PDD prevalence for milking cows in dairies was 6.1%. Finally, in one dairy, PDD screening at the parlor was compared to PDD diagnosis by inspecting restrained cows in a chute. The screening method had a sensitivity of 0.72, and a specificity of 0.99. This study demonstrated that PDD was widespread on study dairies in Chile. The screening test presented can be used as a cost efficient method to estimate prevalence of PDD either on individual dairies or in large-scale surveys. © 1998 Elsevier Science B.V. All rights reserved.

Research Area(s)

  • Cattle - microbiological diseases, Digital dermatitis, Lameness, Papillomatous digital dermatitis

Bibliographic Note

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Citation Format(s)

Papillomatous digital dermatitis in Chilean dairies and evaluation of a screening method. / Rodriguez-Lainz, Alfonso; Melendez-Retamal, Pedro; Hird, David W. et al.
In: Preventive Veterinary Medicine, Vol. 37, No. 1-4, 01.12.1998, p. 197-207.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review