Translator Disclaimer
1 April 2005 EPIDEMIOLOGY OF CHRONIC WASTING DISEASE IN FREE-RANGING MULE DEER: SPATIAL, TEMPORAL, AND DEMOGRAPHIC INFLUENCES ON OBSERVED PREVALENCE PATTERNS
Author Affiliations +
Abstract

We analyzed chronic wasting disease (CWD) prevalence data from mule deer populations in northcentral Colorado, USA, to discern the likely influences of temporal, spatial, and demographic factors on patterns observed in naturally infected populations. In addition to reaffirming spatial heterogeneity among wintering mule deer subpopulations, we report marked differences in CWD prevalence by sex and age groups as well as clear local trends of increasing prevalence over a 7-yr period. Prevalence of CWD differed by age (yearling vs. adult), sex, and geographic area at two different spatial scales (game management unit or population unit winter range) and increased over time at both geographic scales. Disease status (positive or negative) was not independent of age for males (n = 285, df = 6, χ2 = 18.4, P = 0.005) or females (n = 387, df = 8, χ2 = 17.2, P = 0.028). Among males, prevalence increased and then declined across age classes, peaking in 5- to 6-yr-old individuals; among females, prevalence showed no definite age-related pattern. Demographic, spatial, and temporal factors all appear to contribute to the marked heterogeneity in CWD prevalence in endemic portions of northcentral Colorado, USA. These factors likely combine in various ways to influence epidemic dynamics on both local and broad geographic scales.

Miller and Conner: EPIDEMIOLOGY OF CHRONIC WASTING DISEASE IN FREE-RANGING MULE DEER: SPATIAL, TEMPORAL, AND DEMOGRAPHIC INFLUENCES ON OBSERVED PREVALENCE PATTERNS
Michael W. Miller and Mary M. Conner "EPIDEMIOLOGY OF CHRONIC WASTING DISEASE IN FREE-RANGING MULE DEER: SPATIAL, TEMPORAL, AND DEMOGRAPHIC INFLUENCES ON OBSERVED PREVALENCE PATTERNS," Journal of Wildlife Diseases 41(2), 275-290, (1 April 2005). https://doi.org/10.7589/0090-3558-41.2.275
Received: 1 March 2004; Published: 1 April 2005
JOURNAL ARTICLE
16 PAGES


SHARE
ARTICLE IMPACT
Back to Top