CAES Profile

Jeferson Lourenco Assistant Professor Animal & Dairy Science

Contact Information jefao@uga.edu 706-542-5364

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

Biography

Dr. Jeferson Lourenco started his career managing commercial farms in Brazil (dairy and beef-producing farms) and accumulated almost a decade of experience in that role. After moving to the U.S., he pursued his Masters and PhD at the University of Georgia. His master’s program focused on feeds and nutrition of ruminants, while his PhD studies expanded into the fields of microbiology and bioinformatics.

Dr. Lourenco has been working with microbiology applied to animal sciences, bioinformatics, and biostatistics utilizing several animal species (particularly cattle, chicken, and swine). His research relies heavily on metagenomic approaches, however, he is also interested in the biologically relevant metabolites (e.g. short chain fatty acids) produced by microorganisms, which may have a significant impact on animal health and productivity.

B.S., State University of Maringá (Brazil)

D.V.M., Unicesumar (Brazil)

M.S., University of Georgia

Ph.D., University of Georgia

Research Interests

Dr. Lourenco is interested in using metagenomics and bioinformatics approaches to understand the biological relationship between animals and their microbial populations (their microbiota), including their metabolites. The main purpose of his research is to understand how the host-microbe interactions affect animal health, productivity, the quality of final products (e.g. meat and dairy products), and the excretion of nutrients to the environment.

Selected Recent Publications

Refereed Research Articles

1) C. B. Welch, J. M. Lourenco, T. R. Krause, D. S. Seidel, F. L. Fluharty, T. D. Pringle, T. R. Callaway. (2021). Evaluation of the Fecal Bacterial Communities of Angus Steers With Divergent Feed Efficiencies Across the Lifespan From Weaning to Slaughter. Frontiers in Veterinary Science, 8:597405. https://doi.org/10.3389/fvets.2021.597405.

2) R. E. Jeni, D. K. Dittoe, E. G. Olson, J. Lourenco, N. Corcionivoschi, S. C. Ricke, and T. R. Callaway. (2021). Probiotics and Potential Applications for Alternative Poultry Production Systems. Poultry Science. https://doi.org/10.1016/j.psj.2021.101156.

3) J. M. Lourenco, R. S. Hampton, H. M. Johnson, T. R. Callaway, M. J. Rothrock Jr., and M. J. Azain. (2021). The Effects of Feeding Antibiotic on the Intestinal Microbiota of Weanling Pigs. Frontiers in Veterinary Science, 8:601394. https://doi.org/10.3389/fvets.2021.601394.

4) R. E. Jeni, D. K. Dittoe, E. G. Olson, J. Lourenco, D. S. Seidel, S. C. Ricke, and T. R. Callaway. (2021). An Overview of Health Challenges in Alternative Poultry Production Systems. Poultry Science. https://doi.org/10.1016/j.psj.2021.101173.

5) T. J. Hendricks, D. W. Hancock, J. J. Tucker, F. J. Maia, and J. M. Lourenco. (2021). Ensiling Alfalfa and Alfalfa-Bermudagrass with Ferulic Acid Esterase-Producing Microbial Inoculants. Crop, Forage, & Turfgrass Management, 2021;e20093. https://doi.org/10.1002/cft2.20093.

6) J. Jeon, J. Lourenco, E. E. Kaiser, E. S. Waters, K. M. Scheulin, X. Fang, H. A. Kinder, S. R. Platt, M. J. Rothrock Jr., T. R. Callaway, F. D. West, and H. J. Park. (2020). Dynamic Changes in the Gut Microbiome at the Acute Stage of Ischemic Stroke in a Pig Model. Frontiers in Neuroscience, 14:587986. https://doi.org/10.3389/fnins.2020.587986.

7) J. M. Lourenco, T. J. Kieran, D. S. Seidel, T. C. Glenn, M. F. da Silveira, T. R. Callaway, and R. L. Stewart Jr. (2020). Comparison of the ruminal and fecal microbiotas in beef calves supplemented or not with concentrate. PLOS ONE 15(4): e0231533. https://doi.org/10.1371/journal.pone.0231533.

8) T. R. Krause, J. M. Lourenco, C. B. Welch, M. J. Rothrock Jr., T. R. Callaway, and T. D. Pringle. (2020). The relationship between the rumen microbiome and carcass merit in Angus steers. Journal of Animal Science, 98(9). https://doi.org/10.1093/jas/skaa287.

9) C. B. Welch, J. M. Lourenco, D. B. Davis, T. R. Krause, M. N. Carmichael, M. J. Rothrock Jr., T. D. Pringle, and T. R. Callaway. (2020). The impact of feed efficiency selection on the ruminal, cecal, and fecal microbiomes of Angus steers from a commercial feedlot. Journal of Animal Science, 98(7). https://doi.org/10.1093/jas/skaa230.

10) J. M. Lourenco, S. C. Nunn, E. J. Lee, C. R. Dove, T. R. Callaway, and M. J. Azain. (2020). Effect of Supplemental Protease on Growth Performance and Excreta Microbiome of Broiler Chicks. Microorganisms, 8, 475. https://doi.org/10.3390/microorganisms8040475.

11) J. M. Lourenco, F. J. Maia, J. H. J. Bittar, J. R. Segers, J. J. Tucker, B. T. Campbell, and R. L. Stewart, Jr. (2020). Utilization of exogenous enzymes in beef cattle creep feeds. Journal of Applied Animal Research, 48: 70-77. https://doi.org/10.1080/09712119.2020.1732985.

12) J. M. Lourenco, T. R. Callaway, T. J. Kieran, T. C. Glenn, J. C. McCann, and R. L. Stewart Jr. (2019). Analysis of the Rumen Microbiota of Beef Calves Supplemented During the Suckling Phase. Frontiers in Microbiology, 10:1131. https://doi.org/10.3389/fmicb.2019.01131.

13) J. M. Lourenco, Rothrock Jr., M. J., Sanad Y. M., and Callaway T. R. (2019). The Effects of Feeding a Soybean-Based or a Soy-Free Diet on the Gut Microbiome of Pasture-Raised Chickens Throughout Their Lifecycle. Frontiers in Sustainable Food Systems, 3:36. https://doi.org/10.3389/fsufs.2019.00036.

14) J. M. Lourenco, Rothrock Jr., M. J., Fluharty F. L., and Callaway T. R. (2019). The Successional Changes in the Gut Microbiome of Pasture-Raised Chickens Fed Soy-Containing and Soy-Free Diets. Frontiers in Sustainable Food Systems, 3:35. https://doi.org/10.3389/fsufs.2019.00035.

15) Fishman-Holland, H., A. Stoskute, M. S. Ferrer, D. Veal, J. H. J. Bittar, E. Rollin, J. Lourenço, and R. A. Palomares. (2019). Comparison of follicular development, timing of ovulation, and serum progesterone, estradiol and luteinizing hormone concentrations in dairy heifers treated with 4- or 5-day CoSynch + CIDR protocols. Veterinary Medicine and Science, 5: 379-389. https://doi.org/10.1002/vms3.171.

16) J. M. Lourenco, Fluharty F. L., and Callaway T. R. (2018). A Refreshed View of the Rumen Microbiome of Beef Cattle in Light of Next-Generation DNA Sequencing. Archives of Animal and Poultry Sciences, 1(1): 555554.

17) Bittar, J. H. J., Hoyos-Jaramillo, A., Hurley, D. J., Woolums, A. R., Havenga, L. J., Lourenço, J. M., Barnett, G., Gomes, V., Saliki, J. T., Harmon, D. D. and Palomares, R. A. (2018). Effects of injectable trace minerals administered concurrently with a modified live virus vaccine on long-term protection against bovine viral diarrhea virus acute infection in dairy calves. Research in Veterinary Science, 119: 250-258. https://doi.org/10.1016/j.rvsc.2018.07.003.

18) J. M. Lourenço, M. A. Froetschel, J. R. Segers, J. J. Tucker, and R. L. Stewart, Jr. (2017). Utilization of canola and sunflower meals as replacements for soybean meal in a corn silage-based stocker system. Translational Animal Science. Volume 1, Issue 4: 592-598. https://doi.org/10.2527/tas2017.0068.

19) J. M. Lourenco, N. DiLorenzo, A. M. Stelzleni, J. R. Segers, and R. L. Stewart, Jr. (2016). Use of by-product feeds to decrease feed cost while maintaining performance of developing beef bulls. The Professional Animal Scientist. Volume 32, Issue 3: 287-294. https://doi.org/10.15232/pas.2015-01436.

Refereed Book Chapters

1) J. M. Lourenço, I. I. Kassem, S. C. Ricke. (2021). Book: Instant Insights: Antibiotics in poultry production. Burleigh Dodds Science Publishing Limited. Cambridge, UK. Publication date: January 26, 2021. ISBN-13: 9781801460101.

2) Hales, K., J. M. Lourenco, D. S. Seidel, O. Y. Koyun, D. Davis, C. Welch, J. E. Wells, and T. R. Callaway. (2020). The use of feedlot/cereal grains in improving feed efficiency and reducing by-products such as methane in ruminants. Chapter of book: Improving rumen function. Editors: Dr. Chris McSweeney and Professor Roderick I. Mackie. Burleigh Dodds Science Publishing Limited. Cambridge, UK. Publication date: June 22, 2020. http://dx.doi.org/10.19103/AS.2020.0067.23.

3) J. M. Lourenço, D. S. Seidel, and T. R. Callaway. (2019). Antibiotics and gut function: historical and current perspectives. Chapter of book: Improving gut health in poultry. Editor: Professor Steven C. Ricke. Burleigh Dodds Science Publishing Limited. Cambridge, UK. Publication date: November 25, 2019. http://dx.doi.org/10.19103/AS.2019.0059.10.