Brief Summary of Minutes of Annual Meeting

Please see the attached file below for S1081's annual meeting minutes.

Past projects

1. Essential oils (phytogenics). KY working on manuscript.
2. Boron. AK will put additional sows on this objective in 2023. KY has data from approximately 150 litters with limited detectable effect. Some evidence of effect on birth weight. Unsure of the overall value of additional data.
3. Phase feeding. One manuscript in final review process from SD. Expect publication soon. Other data waiting submission by past student to finalize another manuscript. No additional sows expected on this objective.

Current projects

1. Iron. One student completed thesis work on this project from KY. Two students working on this objective at SD. At SD, first parity data indicates a dip in sow Hb status around 90 d of gestation and at least 60% of piglets below target Hb status at birth with 40% still below target at weaning and no clear relationship with birth or weaning weight. Additional sows going on test at SD in 2023.
2. Histidine (HIS). Extensive discussion on study proposal. Added His during lactation, greater milk output based on dairy cattle. Proposed limit to 2 sow groups to strengthen statistical power at individual stations and for ease of treatment application. Proposed Control diet and Control + 0.2% added His. Based on quick gestation diet formulation, 0.2% represents about 40% added His. Recommend to limit SID Lys to 0.93%. Proposed variables of interest: farrowing and litter performance, milk at d10 – 14; N balance at d10 – 14; total tract digestibility at d15. Eric at SD to look into measuring milk casein content. Robert at GA to contact CJ Bio about providing His. Crystal at SD has Val to share for diet formulations. Recommended all stations interested (UK, GA, AK, SD) to put sows on test starting spring 2024 to try to limit differences in lactation intake due to heat. At present, expect about 150 total sows on test. Recommend separate His diet rather than top dress to better account for specific sow intake (hence His intake). Crystal at SD to prepare draft study protocol to share. Robert at GA to finalize diet formulations.
3. Sow metabolic status. Discussion around what samples are either already being collected or easily added to existing projects that could be used for metabolic screening of sows in late gestation to be correlated with ‘good’ and ‘bad’ lactation performance. Proposed each station to collect serum sample at loading to farrowing room from as many sows as possible Once lactation is complete, identify ‘good’ vs ‘bad’ performing sows and send those specific samples to Eric at SD along with specific farrowing/lactation performance. Eric to analyze samples for cytokines and/or acute phase proteins.
4. Sensory additives. AK has some initial data. KY plans to start sows on test, specific to an umami product.

Published Outputs from S1081 activity 2021-2022

Journal Article, Academic Journal

Chevalier, T. B., Monegue, H. J., ~ Lindemann, M. D. (2021). Effects of iron injection dosage to newborn piglets on hematological measures, growth performance pre and postweaning, and postweaning tissue mineral content, Journal of Swine Health and Production, 29, 189-199.

Elefson, S. K., Lu, N., Chevalier, T., Dierking, S., Wang, D., Monegue, H. J., Matthews, J. C., Jang, Y. D., Chen, J., Rentfrow, G. K., Adedokun, S. A., Lindemann, M. D. (2021). Assessment of visceral organ growth in pigs from birth through 150 kg, Journal of Animal Science, 99(9). doi: 10.1093/jas/skab249

Presentations Given

Chevalier T. B., Lindemann M. D., (September 2022). Injecting Different Amounts of Iron - Effects on Blood Parameters During Late Nursery-Early Grower Phase, Midwest Swine Nutrition Conference. Invited, Regional.

Chevalier T. B., Lindemann M. D., (March 2022). Effects of boron supplementation on apparent digestibility and retention of nutrients in growing pigs, Midwest meeting, American Society of Animal Science. Accepted, National.

Chevalier T. B., Lindemann M. D., (July 2021). Effects of dietary boron supplementation on growth performance, fasting and postprandial serum insulin, and glucose concentration of pigs, National meeting, American Society of Animal Science. Accepted, National.

Lee J. W., Monegue H. J., Williams K., Estienne M. J., Chapman J., Humphrey B., Lindemann M. D., (July 2021). Long-term evaluation of dietary OmniGen AF supplementation on reproductive performance and milk composition of sows National meeting, American Society of Animal Science. National.

Chevalier T. B., Adeola O., Carter S. D., Dove C. R., Estienne M. J., Levesque C. L., Maxwell C. V., Tsai T. C.C, Lindemann M. D., (March 2021). A multistate evaluation of an additional iron injection administered to piglets before weaning Midwest section, American Society of Animal Science. Accepted, National.

Dierking, S., Morton, J.M., Pinilla, J.C., Gonda, M.G., Rekabdarkolaee, M., Clapper, J.A., and Levesque, C.L. 2022. Identification of potential biomarkers of reproductive development in vaginal gene expression associated with serum concentrations of reproductive hormones at key periods in gilt development. 2022 ASAS Annual Meeting. June 27-30. Oklahoma City, OK. 

Dierking, S.L., Morton, J., Pinilla, J.C., Gonda, M., Clapper, J.A., and Levesque, C.L. 2022. Identification of biological markers to detect early estrus in pre-pubertal gilts. 2022 ASAS Midwest Section Meeting. March 14-16. Omaha, NE 

 Ramirez-Camba, C. and C.L. Levesque. 2022. An empirical model of essential amino acid requirements in the pregnant sow that optimizes maternal reproductive performance and offspring development. 2022 ASAS Midwest Section Meeting. March 14-16. Omaha, NE

Poster Session

Lindemann M. D., Chen J., Lee J. W., (July 2021). Evaluation of dietary OmniGen AF supplementation and PG600 injection on reproductive characteristics of gilts National meeting, American Society of Animal Science. Accepted, National.