Dr. Fernando Leite, a PhD student under the supervision of Dr. Richard Isaacson, won the Lynn Jones Memorial Award for the best oral presentation at the 97th Conference of Research Workers in Animal Diseases (CRWAD). His talk entitled “Lawsonia intracellularis vaccination decreases Salmonella enterica serovar Typhimurium shedding in co-infected pigs” presented the results of the work he did in collaboration with Drs. Gebhart, Singer, and Isaacson at the University of Minnesota.
Please join us in congratulating Fernando for his award!
Abstract: Salmonella enterica serovar Typhimurium and Lawsonia intracellularis are two of the most prevalent intestinal pathogens of swine. S. Typhimurium causes diarrhea but also results in subclinical persistent colonization of pigs and can lead to food borne illnesses. S. enterica is responsible for over 1 million cases of food borne illness per year in the United States. L. intracellularis infection has been found as a risk factor for increased S. Typhimurium shedding in swine. The objective of this study was to investigate if vaccination against L. intracellularis could lead to decreased S. Typhimurium shedding. To test this hypothesis, groups of nine pigs were either challenged with S. Typhimurium, S. Typhimurium and L. intracellularis, S. Typhimurium and vaccinated against L. intracellularis, or S. Typhimurium L. intracellularis and vaccinated against L. intracellularis. A non-infected control group served as a negative control. Fecal shedding of S. Typhimurium was monitored using an enrichment most probable number method two days after infection and weekly thereafter until animals reached the age of 14 weeks. The co-challenged vaccinated group had a tendency of shedding the least S. Typhimurium and at one-week post infection is when the greatest differences among groups was observed and the vaccinated co-challenged group shed significantly less Salmonella (p>0.05) than the group co-infected without vaccination and the group challenged with Salmonella alone. These differences were of 1.63 and 2.12 Log10 organisms per gram of feces, respectively. The instestinal microbiome of these animals is being investigated to understand how it may have impacted Salmonella shedding levels in the different treatments. These results indicate that vaccination against L. intracellularis may aid in the control of S. Typhimurium in herds co-infected with L. intracellularis.
Tuesday marked the end of the 2016 Allen D. Leman conference held in St. Paul, MN. The conference gathered more than 850 professionals and veterinarians from the swine industry for 4 days of conferences and exchanges on the latest science-driven solutions.
Among the highlights from this conference, we would like to congratulate Dr. Deb Murray from New Fashion Pork for receiving the Science in Practice Award. The Pijoan lecture was given by Dr. Peter Davies from the University of Minnesota whereas Dr. Paul Ruen from Fairmont Veterinary Clinic presented the Hanson lecture. Dr. Joe Connor was recognized as the Breakfast Conversation Honoree this year. Lastly, our Distinguished Lecturer, Dr. Alison Van Eenennaam challenged the audience on Genetically Modified Organisms (GMOs).
If you attended the conference, you may have received an email with a link to a survey. Please, consider taking a few minutes to answer it as we very much value your input and feedback.
Thank you and see you next year, September 16−19, for another amazing edition of the Allen D. Leman conference!
The 2nd International Conference on One Medicine One Science will be held from April 24th to April 27th at the Commons Hotel in Minneapolis.
iCOMOS is a global forum to:
communicate the importance of science in solving pressing health issues at the interface of humans, animals and the environment;
facilitate interdisciplinary, international collaborations embracing health, science and economics;
inform public policy development that is necessary for preserving human and animal health.
Human and animal health care scientists and professionals, economists, trainees, environmental scientists, ethicists, public health and chronic disease specialists, and policy experts in health, agriculture, food, and environmental affairs are invited to come and exchange on this essential topic that is One Health.
UMN students did a fantastic job at the 2016 American Association of Swine Veterinarians (AASV) meeting. Four students presented their projects as a poster presentation and two gave a presentation, reaching 2nd and 3rd position of the student competition. Alyssa Anderson was one of the five students awarded with the Merck-AASV Foundation scholarship.
On the faculty side, Dr. Mike Murtaugh’s research project concerning the development of a challenge-free model to predict vaccine efficacy, was one of the four recognized by and received support from the AASV Foundation.