Dr. David Smith, DVM, PhD

Dr. David Smith, DVM, PhD

Titles:

  • Endowed Professor
  • Mikell and Mary Cheek Hall Davis Endowment for Beef Cattle Health and Reproduction

Contacts:

drs198@msstate.edu
Office: (662) -32-5-13

Overview

Summary:

As an epidemiologist, I have studied the cause, control, and prevention of diseases of cattle important to human and cattle health. My contributions to science have the central theme of creating teams of investigators to discover how food animal production-systems can be modified to improve the health, well-being, and productivity of animals (primarily cattle), and also benefit human and environmental health.

Education:

  • Doctor of Philosophy (Ph.D.), Veterinary Preventive Medicine, Ohio State University, The, 1997
  • Doctor of Veterinary Medicine (D.V.M.), Veterinary Medicine, Ohio State University, The, 1983
  • Bachelor of Science (B.S.), Agriculture, Ohio State University, The, 1980

Research interests:

Applying systems thinking to solve common health and productivity problems of cattle, including:

antimicrobial resistance
bovine respiratory disease
failure of transfer of maternal immunity
pre-harvest food safety

Publications

Conference Proceeding

  • Identification of potential predictive biomarkers and molecular mechanisms contributing to BRD-associated mortality in post-weaned beef cattle.  World Buiatrics Congress. 2022
  • Sorry, but this cow is open, too: investigating and monitoring reproduction..  Academy of Veterinary Consultants. 2022
  • Understanding the nature of epidemics and how to quell them. .  Convention of the American Veterinary Medical Association. 2022
  • A simulation model to study the effects of dog density on illness and release rates in animal shelters. .  International Symposium of Veterinary Epidemiology and Economics. 2022
  • The effect of removing arrival metaphylaxis on the pre-harvest beef value chain..  International Symposium of Veterinary Epidemiology and Economics. 2022
  • Case-control study to identify management practices associated with morbidity and mortality from bovine anaplasmosis in Mississippi USA cow-calf herds..  International Symposium of Veterinary Epidemiology and Economics. 2022
  • Multipopulational transcriptomic analysis of high-risk beef cattle on arrival reveals genes and mechanisms which may predict bovine respiratory disease.  American Association of Bovine Practitioners. 2021
  • Increased expression of viral defense genes at arrival may contribute to BRD-associated mortality.  Conference of Research Workers in Animal Diseases . 2019
  • Whole blood RNA-seq analysis at arrival to identify biomarkers of respiratory disease risk in stocker cattle.  Conference of Research Workers in Animal Diseases . 2019
  • Whole blood RNA-Seq analysis of stocker calves reveals insights into BRD.  Conference of Research Workers in Animal Diseases . 2019
  • Whole blood RNA-Seq analysis of stocker calves at arrival provides immunological and metabolic distinction related to BRD.  2019 Bovine Respiratory Disease Symposium . 2019
  • Whole blood transcriptome analysis reveals altered pathways related to inflammation and fatty acid metabolism in stocker calves that develop bovine respiratory disease.  International Veterinary Immunology Symposium . 2019
  • On-arrival blood transcriptomes identify altered immune pathways in stocker cattle that develop bovine respiratory disease.  American College of Veterinary Internal Medicine Forum . 2019
  • Assesment of On-Arrival Vaccination and Deworming on Stocker Cattle Health and Growth Performance.  Journal of Animal Science. 2018
  • Effect of crude protein levels and metaphylaxis on feedlot and carcass performance.  Southern Section Animal Science. 2015

Journal Article

MAFES Research Publication

Published Abstract

  • Describing the consumption of chlortetracycline-containing supplement offered free-choice to commercial beef cows on pasture. Journal of Animal Science. 2023
  • Describing the consumption of chlortetracycline-containing mineral offered free-choice to commercial beef cows on pasture. MSU Undergraduate Research Symposium. Issue Spring 2023. 2023
  • Describing the consumption of chlortetracycline-containing mineral offered free-choice to commercial beef cows on pasture. Mississippi State University Undergraduate Research and Creative Discovery. 2023

Presentations

Abstract

  • "Effect of crude protein levels and metaphylaxis on feedlot and carcass performance." 2015 Southern Section Animal Science Meeting, ASAS, Atlanta, GA. 2015

Oral Presentation

  • "Identification of potential predictive biomarkers and molecular mechanisms contributing to BRD-associated mortality in post-weaned beef cattle." World Buiatrics Congress, WBC, Madrid, Spain. 2022
  • "Multipopulational transcriptomic analysis of high-risk beef cattle on arrival reveals genes and mechanisms which may predict bovine respiratory disease." Conference of the American Association of Bovine Practitioners (AABP), AABP, Salt Lake City, UT. 2021
  • "A system dynamics model of shelter capacity for care." Conference for Research Workers in Animal Disease, Conference for Research Workers in Animal Disease , Chicago, IL. 2020
  • "Economic Impact of Removing Arrival Metaphylaxis in the U.S. Stocker and Feedlot Industry." Conference for Research Workers in Animal Disease , Conference for Research Workers in Animal Disease , Chicago. 2020
  • "Exploring state-level risks for introducing chronic wasting disease into wild cervid populations." Conference for Research Workers in Animal Disease , Conference for Research Workers in Animal Disease , Chicago, IL. 2020
  • "A system dynamics model of shelter capacity for care." Conference of Research Workers in Animal Diseases, , Virtual. 2020
  • "Blood biomarker discovery in high-risk stocker cattle at-arrival: differentiating respiratory health and disease.." Conference of Research Workers in Animal Diseases(CRWAD) , CRWAD, Virtual. 2020
  • "Transcriptomic profiling of BRD-attributed mortality in stocker cattle identifies active inflammatory and antiviral pathways at arrival.." Conference of the American Association of Bovine Practitioners (AABP), AABP, Virtual. 2020

Poster

  • "Describing consumption of chlotetracycline-containing mineral offered free-choice to fall-calving cows on pasture: a pilot study." North MS Producer Advisor Council, NMREC, Verona. 2023

Areas of Expertise

Epidemiology cattle population medicine one health food safety veterinary medicine