Publications by Dr. Plant
Jon D. Plant, Wayne S. Rosenkrantz, Craig E. Griffin. Factors associated with and prevalence of high Malassezia pachydermatis numbers on dog skin. J Am Vet Med Assoc. 201(6), 1992, Pages: 879-82.
The prevalence of cutaneous Malassezia spp was evaluated in a semiquantitative fashion at 3 sites on 98 dogs examined because of various dermatoses. Thirty (10.2%) of the sites and 19 (19.4%) of the dogs had Malassezia spp amounts higher than that found on grossly normal skin. The prevalence of higher than normal amounts did not correlate significantly with sample site, sex, or age. The factors associated with an increased prevalence of increased Malassezia spp counts were seborrheic dermatitis, recent antibiotic treatment, and breed.
Jon D. Plant, Jack N. Giovanini and Aurora Villarroel. Frequency of appropriate and inappropriate presentation and analysis methods of ordered categorical data in the veterinary dermatology literature from January 2003 to June 2006. Veterinary Dermatology, 18(4), 2007, Pages: 260–266.
Clinical outcomes that are difficult to measure directly are often graded with ordinal scales in the veterinary dermatology literature to approximate objective evaluation. Ordered categorical scales require statistical presentation and analysis methods consistent with the structure of the data. The objective of this study was to determine the frequency of inappropriate presentation and analysis methods of ordered categorical data in the recent veterinary dermatology literature. A total of 62 articles published between 1 January 2003 and… (read more)
Jon D. Plant. Repeatability and reproducibility of numerical rating scales and visual analogue scales for canine pruritus severity scoring. Veterinary Dermatology, 18(5), 2007, Pages: 294–300.
Although they are used frequently in veterinary dermatology, the reliability of canine pruritus severity scales has not been reported. The objective of this study was to evaluate the reliability of pruritus severity numerical rating scales (NRS) and pruritus severity visual analogue scales (VAS). Videos of 16 dogs were evaluated for pruritus severity by 24 observers utilizing three NRS and three VAS. Intraobserver repeatability and interobserver reproducibility were evaluated with Cohen's kappa and Kendall's rank correlation statistics, respectively. (read more)
Jon D. Plant. Correlation of observed nocturnal pruritus and actigraphy in dogs. Veterinary Record 2008;162:19 624-625. (abstract not available).
Jon D. Plant, Elizabeth M. Lund and Mingyin Yang. A case–control study of the risk factors for canine juvenile-onset generalized demodicosis in the USA. Veterinary Dermatology, 22(1), 2011, Pages: 95–99.
Canine juvenile-onset generalized demodicosis (JOGD) is a common skin disorder suspected to be associated with multiple risk factors, including breed predispositions. These risk factors have not been well documented in a large population. A retrospective case–control study was conducted by searching the electronic medical records of 1,189,906 dogs examined at 600 hospitals during 2006 in order to assess the risk factors associated with JOGD in the USA. Multivariate analyses were conducted using logistic regression to estimate the relative risk with the odds ratio for variables hypothesized to influence the risk for canine demodicosis…(read more)