Valerie E Ryman Assistant Professor Animal & Dairy Science
Portrait of Valerie E Ryman
Contact Information 706-542-9105
Mailing Address Athens, CAES Campus Stru Animal Dairy Sci -, 425 River Road, Athens, GA 30602
Shipping Address Athens, CAES Campus Stru Animal Dairy Sci -, 425 River Road, Athens, GA 30602

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Portrait of Valerie E Ryman


Dr. Valerie Ryman is an Assistant Professor and Extension Dairy Specialist in the Animal and Dairy Science Department. She received her B.S. from Clemson University, M.S. from University of Georgia, and Ph.D. from Michigan State University. After completing her Ph.D., Dr. Ryman worked as a Postdoctoral Research Associate at University of Georgia before accepting a position as a Public Service Assistant and Extension Dairy Specialist in the Animal and Dairy Science Department. Her responsibilities as an Extension Dairy Specialist included teaching and extension activities in mammary health, mastitis, and milk quality. Currently, as an Assistant Professor and Extension Dairy Specialist, she continues to serve the dairy stakeholders in Georgia while also teaching the next generation of animal and dairy scientists. In pursuit of continual improvement as an instructor, Dr. Ryman has been selected as a Teaching Academy Fellow (2020-2021) and Lilly Teaching Fellow (2020-2022). She also participated in the Active Learning Summer Institute as active learning and interactive classrooms is a central tenet of her teaching philosophy. In 2023, she received the Active Learning Leader Certificate.

B.S., Clemson University
M.S., University of Georgia
Ph.D., Michigan State University

Courses Taught

ADSC 2000 – Practicum in Animal and Dairy Science
ADSC 2000L – Practicum in Animal and Dairy Science Lab
ADSC 3420 – Physiology of Lactation in Farm Animals
ADSC 3810 – Animal and Dairy Science Orientation
ADSC 4250/6250 – Microbiology and Immunology in Domestic Animal Health
ADSC 4820 – Senior Seminar in Animal and Dairy Science
ADSC 4960 – Undergraduate Research in Animal and Dairy Science
ADSC 8800 – Graduate Seminar
FYOS 1001 – First Year Odyssey Seminar “Does Chocolate Milk Come From Brown Cows?”

Description of Extension and Research Interests

Dr. Ryman’s extension interests are focused on assisting dairy cattle producers with strategies to maximize mammary health and milk quality. Dr. Ryman works with dairy producers and stakeholders in Georgia to reduce mammary disease (i.e., mastitis) in dairy cattle and its associated health and economic impacts through on-farm evaluations and consultations, hands-on workshops, seminars, and extension publications. Dr. Ryman also maintains an applied research program in this area to train both undergraduate and graduate students in dairy cattle science and extension activities, as well as, explore techniques that can be directly implemented on dairy operations.


Selected Recent Publications

Ryman, V.E., Tao, S., and S.C. Nickerson. 2022. Management Strategies to Reduce Heat Stress, Prevent Mastitis and Improve Milk Quality in Dairy Cows and Heifers. B 1426.

Williamson, J. R., Callaway, T. R., Rollin, E., & Ryman, V. E. 2022. Association of pre-treatment somatic cell counts with bacteriological cure following diagnosis of intramammary infection. Res Vet Sci, 152, 537-545.

Edmunds, C. E., Cornelison, A. S., Farmer, C., Rapp, C., Ryman, V. E., Schweer, W. P.,. Dove, C. R. 2022. The Effect of Increasing Dietary Manganese from an Organic Source on the Reproductive Performance of Sows. Agriculture, 12(12), 16 pages.

Williamson, J. R., Callaway, T. R., Lourenco, J. M., & Ryman, V. E. 2022. FRONT MICRO, 13, 17 pages.

Williamson, J., Callaway, T., Rollin, E., & Ryman, V. 2022. Association of Milk Somatic Cell Count with Bacteriological Cure of Intramammary Infection-A Review. Agriculture, 12(9), 18 pages.

Welch, C. B., Ryman, V. E., Pringle, T. D., & Lourenco, J. M. 2022. Utilizing the Gastrointestinal Microbiota to Modulate Cattle Health through the Microbiome-Gut-Organ Axes. Microorganisms, 10(7), 21 pages.

Ryman, V.E., Kautz, F.M., Nickerson, S.C. 2021. Case Study: Misdiagnosis of Nonhemolytic Staphylococcus aureus Isolates from Cases of Bovine Mastitis as Coagulase-Negative Staphylococci. Animals, 11, 252.

Ryman, V.E., Sapp, P., and P. Sapp. 2021 The Importance of Forestripping on Milk Letdown, Milk Quality, and Mastitis Detection. University of Georgia Cooperative Extension Bulletin. B 1543.

Nickerson, S.C. and V. Ryman. 2019. Role of Antibiotic Therapy in Mastitis Control for Lactating and Dry Cows. UGA Cooperative Extension Bulletin 1516. Pages 1-11.

Ryman, V.E., N. Packiriswamy, B. Norby, J.C. Gandy, S.M. Schmidt, A.L. Lock, and L.M. Sordillo. 2017. Supplementation of linoleic acid (C18:2n-6) or α-linolenic acid (C18:3n-3) changes microbial agonist-induced oxylipid biosynthesis. J Dairy Sci, 100:1870-1887.

Ryman, V.E., N. Packiriswamy, J.C. Gandy, and L.M. Sordillo. 2016. Apoptosis of endothelial cells by 13-HPODE contributes to impairment of endothelial barrier integrity. Mediat Inflamm. vol. 2016, Article ID 9867138, 13 pages. doi:10.1155/2016/9867138.

Ryman, V.E., N. Packiriswamy, and L.M. Sordillo. 2015. Role of endothelial cells in bovine mammary gland health and disease. Anim Health Res Rev, 16:135-149.

Mavangira, V, J.C. Gandy, C. Zhang, V.E. Ryman, A.D. Jones, and L.M. Sordillo. 2015. Polyunsaturated fatty acids influence differential biosynthesis of oxylipids and other lipid mediators during bovine coliform mastitis. J Dairy Sci, 98:6202-6215.

Ryman, V.E., G.M. Pighetti, J.D. Lippolis, J.C. Gandy, C.M. Applegate, and L.M. Sordillo. 2015. Quantification of bovine oxylipids during intramammary Streptococcus uberis infection. Prostaglandins Other Lipid Mediat, 121:207-217.

Ryman, V.E., S.C. Nickerson, D.J. Hurley, R.D. Berghaus, and F.M. Kautz, 2013. Influence of horn flies (Haematobia irritans) on teat skin condition, intramammary infection, and serum anti-S. aureus antibody titres in Holstein heifers. Res Vet Sci, 95:343-346.

Ryman, V.E., S.C. Nickerson, F.M. Kautz, D.J. Hurley, L.O. Ely, Y.Q. Wang, and N.E. Forsberg. 2013. Effect of dietary supplementation on the antimicrobial activity of blood leukocytes isolated from Holstein heifers. Res Vet Sci, 95:969-974.