1. Comparative Medicine & Integrative Biology, Michigan State University , East Lansing, MI 48824 , USA
2. Department of Fisheries & Wildlife, Michigan State University , East Lansing, MI 48824 , USA
3. Berrien County Health Department , Benton Harbor, MI 49023 , USA
4. Michigan Department of Health and Human Services , Lansing, MI 48933 , USA
5. Department of Large Animal Clinical Sciences, Michigan State University , East Lansing, MI 48824 , USA