September 22, 2011

students and staff


Maria-Jose Fuenzalida

A Chilean native, Maria-Jose received her DVM from the Universidad Austral de Chile, Valdivia-Chile in 2009. While studying veterinary medicine, she was struck by how little research described the relationship between mastitis and reproduction performance in dairy cows. Now, as a Master’s student at UW-Madison, she is filling in this gap. Her research project aims to identify the impact of mastitis on fertility and pregnancy loss in lactating dairy cows.


johnJohn Penry

John is a cattle veterinarian from Camperdown in SW Victoria, Australia. Earning both his Bachelor’s degree in Veterinary Science and his Master’s degree in Dairy Medicine from Melbourne University, he is now undertaking his PhD at UW. John has worked in his field for 21 years, while owning a mixed animal/dairy practice in Camperdown. Since 1999, he has been involved in Australia’s national milk quality and mastitis program, Countdown, along with other national extension programs in reproduction, feedbase and human resources. At UW, John’s research will examine new aspects of milk harvesting and milk quality risks, spanning both the Dairy Science and Biological Systems Engineering departments.

stefaniaStefania Leonardi

Born in Italy, Stefania earned her Master’s degree in Science and Technology of Animal Productions at the Università degli Studi di Milano. After graduation she moved to Argentina to work with the Facultad de ciencias Veterinarias at the Universidad Nacional de la Plata. Back in Milan, Stefania began her PhD in the Department of Health, Animal Science and Food Safety. Her PhD studies lead her to be involved in the European project, “Internet of Thing,” which examines the implementation of technological innovations and sensors applied to livestock production for dairy automation. Stefania will spend the next six months at UW developing a similar project in collaboration with the Biological Systems Engineering department to study overpressure and its effects on teat health.

stefaniaStephanie Metzger

Stephanie was born and raised in Akron, Ohio and received her Bachelor’s and Master’s degrees from The Ohio State University. After finishing her Master’s thesis on antimicrobial resistance in mastitis-causing bacteria, she spent three years working as a research associate in a beef and sheep nutrition laboratory at Ohio State. Stephanie is now a PhD student at the University of Wisconsin-Madison and is studying the milk microbiome and inflammation of the mammary gland.


marcelMarcel Gomes Paixão

Born in Itajubá, south of Minas Gerais State, Brazil, Marcel graduated in Animal Science in the Federal University of Lavras (2010) and has a Master degree in Food Science (2013) from the same institution. During his PhD candidacy, Marcel had the opportunity to work with Dr. Ruegg. His experiences in both areas of Animal Science and Food Science led him to investigate the different mastitis pathogens and its influence on milk quality at the cows udder quarter levels.



Tonia Peters

Lab Manager, Department of Dairy Science


Terry Walker

Lab Manager, Department of Dairy Science


Nikki Lennart

Outreach Specialist, Department of Dairy Science