Soil PH and clay content associated with chronic wasting disease in white-tailed deer in northern Illinois

Dorak, Sheena Jean

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https://hdl.handle.net/2142/100416 Copy

Description

Title

Soil PH and clay content associated with chronic wasting disease in white-tailed deer in northern Illinois

Author(s)

Dorak, Sheena Jean

Issue Date

2016-12-06

Director of Research (if dissertation) or Advisor (if thesis)

Mateus-Pinilla, Nohra

Department of Study

Natural Res & Env Sci

Discipline

Natural Res & Env Sciences

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Chronic wasting disease
• soil

Abstract

Soil is an important reservoir for chronic wasting disease (CWD) which is a prion disease that infects cervids through both direct contact with infected animals and contact with contaminated environments. I built a boosted regression tree model that accurately predicted (AUC = 0.954) the probability of CWD presence in northern Illinois based on soil characteristics (soil texture, pH, cation exchange capacity, organic matter, and water content), then used the outcome to assess possible pathways by which soil characteristics increase the probability of transmission via environmental contamination. The model indicates CWD is likely to be present where: soil pH is greater than 6.6, percent clay is lower than 20%, cation exchange capacity (CEC) is lower than 15 meq/100g, and soil organic matter is less than 4.5%. Soil pH and the abundance of clays and associated soil organic matter and CEC appear to alter the availability of prions immobilized in soil. The results suggest that exposure to prions through probable routes of infection such as inhalation or ingestion is greatest where pH is greater than 6.6 and the percent clay is less than 20%.

Graduation Semester

2016-12

Type of Resource

text

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http://hdl.handle.net/2142/100416

Copyright and License Information

Copyright 2016 Sheena Dorak

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